tag:blogger.com,1999:blog-48971834862948075222024-03-13T02:52:43.252-07:00Scienceguyorg RamblingsAdditional information related to http://www.ideas-inspire.com website and personal experiences of Bill Kuhl.Scienceguyorghttp://www.blogger.com/profile/17457833204658259656noreply@blogger.comBlogger387125tag:blogger.com,1999:blog-4897183486294807522.post-74869142562932152822020-01-17T12:35:00.001-08:002020-01-18T09:43:50.085-08:00Getting the Wrinkles out of Webcam Sessions<div class="separator" style="clear: both; text-align: center;">
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<span style="font-family: "arial" , "helvetica" , sans-serif;">Writing a blog post in hopes of getting some advice on using a webcam to do video conference over the Internet. Within recent weeks I have done several and it is a learning experience. First, I found out my Internet speed was too slow, especially the upload speed. It is now several times faster after a call to my ISP and an increase in monthly charge. After the increase speed the video was much better and now rarely get disconnected. I did two web conferences with people across the country but wondered about the webcam I had which was several years old so I purchased a new one that had good comments on Amazon for $30. </span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;">Before the web session I had yesterday I tested out the video quality by looking at my image on Google Hangouts. It did not seem very bright yet I had three studio lights. I wondered about the how well the built-in webcam microphone would work but gave it a try yesterday in my web session with Milton at Geazel STEM Network. Milton on the other end uses earphones and I can understand why now as when he spoke to my system the sound came out my speakers and back to him through the microphone that was close to my speakers. I will try earphones next time or maybe a headset.</span><span style="font-family: "arial" , "helvetica" , sans-serif;"><br /></span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;">After the web session I began experimenting with different background colors. First I tried my green screen background and this turned my skin color almost to purple. Next I tried a black background and now I was as white as a ghost with almost no background light. At this point the light bulb went off in my head that this was a "white balance" issue. My video camera does automatic white balance, the the webcam does not. It seems that some webcams come with software to make these adjustments, maybe there is a program I could acquire to do this.</span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;">After this I tried an old blue blanket which was better but the old gold colored blanket seemed to fix the color issue the best. Now I could get by using a gold background but it would be nice to be able to use other color backgrounds. No background color will fix the serial killer look on my face, joke related to a video I watched about talking to the camera.</span><span style="font-family: "arial" , "helvetica" , sans-serif;"><br /></span><br />
<span style="font-family: "arial" , "helvetica" , sans-serif;">I am open to suggestions while I literally iron out the wrinkles in my background sheets.</span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;">Bill Kuhl</span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;">I downloaded an $8 program for the Apple App Store that does a bunch of adjustments</span><br />
<span style="font-family: "arial" , "helvetica" , sans-serif;">on my webcam. As for the audio loop back issue, I am thinking using a headset might be best solution.</span><br />
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Scienceguyorghttp://www.blogger.com/profile/17457833204658259656noreply@blogger.com1tag:blogger.com,1999:blog-4897183486294807522.post-5846840444776879492019-09-21T09:11:00.000-07:002019-09-21T11:30:36.153-07:00Probability, Research and Bass Fishing from Shore<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
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<span style="font-family: "arial" , "helvetica" , sans-serif;">I would like to think this article is not so much about my bass fishing experience but about matching my observations with research. I am comparing snippets of this article “<b>The Behavior and Habits of Largemouth Bass</b>” by William K Johnke.</span></div>
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<span style="font-family: "arial" , "helvetica" , sans-serif;">First of I want to state my observations from fishing from a small lake close to my home very often in the evening: </span></div>
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<li><span style="font-family: "arial" , "helvetica" , sans-serif;">From the experience of casting artificial lures from shore over many fishing sessions I find there are places that I have caught fish and other places where I have not caught any.</span></li>
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<li><span style="font-family: "arial" , "helvetica" , sans-serif;">Fishing the general areas that have been successful I will cast a half a dozen times before moving a short distance if I do not catch a fish. Often I will catch a fish in the first couple casts to one small area or I will not, chances of repeatedly casting to the same area are less likely to be successful.</span></li>
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<li><span style="font-family: "arial" , "helvetica" , sans-serif;">Chances seem to be better if you catch a fish right away that you will catch more on that day.</span></li>
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<li><span style="font-family: "arial" , "helvetica" , sans-serif;">More likely I will catch small fish but there are days when I will catch more large fish. </span></li>
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<span style="font-family: "arial" , "helvetica" , sans-serif;">From the article I learned largemouth bass feed primarily from sensing vibration and sight. The lures I most often use wiggle and/or disturb the surface. “They take full advantage of periods or areas of subdued light”, that is why I fish later evening until it is almost dark. “The overwhelming majority of bass will be found in that 10 percent of water”, this is why it is so important to find the best locations. “All bass beyond the smaller sizes (nine to thirteen inches in length and averaging a pound in weight) are basically deep-water fish”, no doubt why I catch so many small fish from shore. “Anything which even hints that his survival may be in jeopardy causes him to retreat hastily”, I find after one fish is caught in a spot that it scares other fish for a short time. Returning to that same spot several minutes later another will often be caught.</span></div>
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<span style="font-family: "arial" , "helvetica" , sans-serif;">Bill Kuhl</span></div>
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Scienceguyorghttp://www.blogger.com/profile/17457833204658259656noreply@blogger.com0tag:blogger.com,1999:blog-4897183486294807522.post-49467734676520973862019-09-10T09:36:00.002-07:002019-09-10T09:36:33.325-07:00Small Field Free Flight with RC Assist<span style="font-family: "arial" , "helvetica" , sans-serif;">I live in a small city with an abundance of opportunities for outdoor activities with a major river, small lakes, trout streams, and bluffs; but there is not much space for free flight model airplanes. In the past I flew simple free flight models that would not be much of a loss if lost. A few years ago I became interested in outdoor competition free flight but I had to travel fairly far to fly the models.</span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;">I have tried to think of ways that I could fly the free flight models from a smaller site. On the first e36 I built I installed RC with rudder control only, used the electronic timer for motor cutoff. The idea being I could fly it in small flying site and then would remove the RC when I could get to a larger flying site. Being completely inexperienced I did not have enough in decalage and crashed, should have used the RC for motor speed also so the power could have been cut; or worked my way up through really short motor runs. With enough decalage it flew fine. I took the RC off and had help trimming it at 2016 Nats.</span><br />
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<tr><td class="tr-caption" style="text-align: center;">Time to use RDT on Satellite 320</td></tr>
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<span style="font-family: "arial" , "helvetica" , sans-serif;">My next attempt to build a free flight model for small field was to build a Sniffer with electric motor and RC controlling the motor speed and DT. This worked pretty well in trimming the model out as I could start with low power and cut power immediately if the model appeared to be in trouble. To work on the transition I could ease off the motor speed at the top of the climb. When adjusted properly I would use full speed and cut off like a normal power free flight. If it was really calm I took it up fairly high and it would stay flying over the small area. Using the RDT function I found it was often hard to judge where it was over. There are numerous obstacles on this field and one time when I did a remote DT it landed in a chain link fence, luckily no damage. Flying this at a somewhat larger field it worked great.</span><br />
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<tr><td class="tr-caption" style="text-align: center;">Sniffer Dt'd into Fence</td></tr>
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<span style="font-family: "arial" , "helvetica" , sans-serif;">From the small field I find I can test the climb of E36 models for about 5 seconds and set for quick DT, maybe could go to 10 seconds but models can drift while DT’ed. I test rubber models for very initial trim by only winding to a hundred turns. I put RC and electric motor on Satellite 320 that I was struggling to trim on glow. This was great at bigger site but was gliding too close to edge of the field in a hurry.</span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;">My latest temporary RC on a free flight was to add rudder control on a Lil Dip towline glider. To start with I have been using a hi-start based on 1/8” rubber. I was able to get the stab incidence set for a good glide. If it started stalling I would use rudder control to turn the plane enough to stop the stalling. With more flights, I would launch the glider and not touch the RC at all as it climbed up and off the hi-start. As it glided around the field I would try to use the RC as little as possible but the unaided glide time has been pretty short so far. In the future I want to try setting trim lever for a gentle circle and see if can stay over field longer.</span><br />
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<tr><td class="tr-caption" style="text-align: center;">Eureka e36 Quick DT Flight</td></tr>
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<span style="font-family: "arial" , "helvetica" , sans-serif;">Bottom line is this is better than not flying at all but not really free flight. It might be helpful in learning to trim out planes without crashing but that should not be an issue to a more experienced free flighter. I still plan to pursue this more and will write again.</span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;">Bill Kuhl</span><br />
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Scienceguyorghttp://www.blogger.com/profile/17457833204658259656noreply@blogger.com0tag:blogger.com,1999:blog-4897183486294807522.post-9595216020583120252019-06-06T19:44:00.003-07:002019-06-06T19:47:31.101-07:00Rocket Glider Aleda-R<span style="font-family: "arial" , "helvetica" , sans-serif;">I have six successful launches on my Aleda-R Boost Glider from J&H Aerospace. This evening I made three launches. So far only the 1/2 A3-4T motors have been used which for the smaller area I fly from get it plenty high, Sometimes it gets rather low before the glider releases but other launches the glider releases rather high giving a long glide. The rocket powered portion of the flight has always been fairly straight vertical. I have also built a swing wing rocket glider but have not launched it yet.</span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;">This is a real short blog post but I want to share some pictures and two videos.</span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;">Bill Kuhl</span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;">To purchase: <a href="https://jhaerospace.com/product/aleda-r-boost-glider/">https://jhaerospace.com/product/aleda-r-boost-glider/</a></span><br />
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Scienceguyorghttp://www.blogger.com/profile/17457833204658259656noreply@blogger.com0tag:blogger.com,1999:blog-4897183486294807522.post-2189205046686769392019-06-01T19:54:00.002-07:002019-06-01T19:54:16.583-07:00Slope Flying With Friends<span style="font-family: "arial" , "helvetica" , sans-serif;">I have not done much slope soaring for awhile and it has been a long time since I have flown with other people so flying from a larger earth dam today was a real treat. I really was not ready with my gliders and forgot the fuselage for the glider that would have worked the best. The drive was interesting with all the curves in the road that seem to take you out in the middle of nowhere.</span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;">To dynamic soar over the grass covered back of the slope you need a wind that is close to North which normally is not real common in nice weather. By afternoon it was sunny and the temperature was perfect. When I arrived I had forgot how steep and long the hill is to the top, not that bad if you walk a diagonal path. Paul and Dave were flying as I arrived, Paul with conventional slope gliders and Dave was flying a F3RES sailplane. The light F3RES climbed easily in the not real strong wind on the front side and Dave even took it to the backside for DS.</span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;">Paul who is very experienced with DS had good laps at times and the wind would die also. So I flew the 2 meter Highlander glider that was given to me, I had never flown it before. After getting the ailerons moving the correct direction I launched it out over the rocky front side and it flew well. I landed for a time and when I tried to fly it again the battery was dead. That was a concern as I have no idea how old the glider is. When I was home I took the battery out and the builder had glued it to the foam. Darn near ripped the nose apart getting it out.</span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;">I tried flying my Super Scooter but there really wasn't enough wind to stay up much of the time but at least being foam it survived landing in the rocks without damage. Later the wind picked up for a time and I could fly on the front side if very gentle on the controls. When it had some altitude I took it too the backside for some DS but never made more than 3 laps before running out of energy. Ali came a little later and flew tiny electric plane that climbed super high in the slope lift.</span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;">The trip back started a little challenging as I could get no cell signal in the remote valley so no GPS to help. I remembered enough of the roads to get where cell service was picked up again. It was a great day and hope to fly this spot again when my slope gliders are tested. </span><br />
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<tr><td class="tr-caption" style="text-align: center;">Trying to Remove Old Battery</td></tr>
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<span style="font-family: "arial" , "helvetica" , sans-serif;"></span>Scienceguyorghttp://www.blogger.com/profile/17457833204658259656noreply@blogger.com0tag:blogger.com,1999:blog-4897183486294807522.post-89412822086031777742019-03-26T06:20:00.000-07:002019-03-26T06:20:17.138-07:00Retirement<span style="font-family: Arial, Helvetica, sans-serif;">Time for new adventures, this is my final week of work before starting a new chapter in my life, retirement. Everyone asks me what I will do, as I never seem to find time for what I want to do now, maybe I will start to catch up. Like most people with a model aviation hobby, there is a never enough time to build all the airplane kits or plans in your stash. Maybe I will take up another hobby like golf, nothing too dangerous like racing motorcycles on frozen lakes. I was watching this winter, and they were trying to talk me into trying it.</span><br />
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<span style="font-family: Arial, Helvetica, sans-serif;">For years it had been my plan to spend more time promoting science projects that are on my website for youth. Sadly it seems there is not much interest in this any longer but I really have not pursued finding interested groups either. With my model aviation hobby I plan to create more videos. Also I want to get to more model airplane contests for sure.</span><br />
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<span style="font-family: Arial, Helvetica, sans-serif;">Working with computers for over 30 years now has been interesting and always changing. My first job after college was mainly computer programming which I really enjoyed, it seemed more creative than what I do now. My current job is more about troubleshooting, and with computers there is plenty of trouble to shoot at. The issues change somewhat over time but there are always new ones. </span><br />
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<a href="https://4.bp.blogspot.com/-VN0fmTlDktA/XJomVSPcXtI/AAAAAAAAV08/wtR5xIMXNk4KWLQIljYhBsa2oO3NUQC9QCLcBGAs/s1600/20190325_105720.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1184" data-original-width="1600" height="295" src="https://4.bp.blogspot.com/-VN0fmTlDktA/XJomVSPcXtI/AAAAAAAAV08/wtR5xIMXNk4KWLQIljYhBsa2oO3NUQC9QCLcBGAs/s400/20190325_105720.jpg" width="400" /></a></div>
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<span style="font-family: Arial, Helvetica, sans-serif;">My attitude towards technology has changed somewhat over time in that I see the positives and a whole lot of negative also. The Internet has put me contact with a whole lot of interesting people who I would never have known if it wasn’t for the Internet. Negatively I think it has completely ruined the music industry, a lot of printed media, and much of retail. </span><br />
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<a href="https://3.bp.blogspot.com/-KfqNXPhkrWk/XJom2R_L-WI/AAAAAAAAV1Q/IRRXX6-WcnUS0V-kcR3Ix6qzum-SlzmyACLcBGAs/s1600/FooPainted.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="640" data-original-width="1297" height="196" src="https://3.bp.blogspot.com/-KfqNXPhkrWk/XJom2R_L-WI/AAAAAAAAV1Q/IRRXX6-WcnUS0V-kcR3Ix6qzum-SlzmyACLcBGAs/s400/FooPainted.jpg" width="400" /></a></div>
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<span style="font-family: Arial, Helvetica, sans-serif;">The biggest challenge right away will be fixing up a house that is very outdated in several areas. Some of the work I will do but major projects will have to be hired out. Hopefully I will learn much as the project progresses. I certainly have learned much in constructing all the balsa model airplanes I have built in the last few years. The latest two nearing completion I am rather proud of, this was the first time covering UltraCoat Lite covering and using epoxy paint on the fuselage.</span><br />
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<span style="font-family: Arial, Helvetica, sans-serif;">Bill Kuhl</span><br />
<span style="font-family: Arial, Helvetica, sans-serif;"><br /></span>
<span style="font-family: Arial, Helvetica, sans-serif;">http://www.ideas-inspire.com</span><br />
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Scienceguyorghttp://www.blogger.com/profile/17457833204658259656noreply@blogger.com0tag:blogger.com,1999:blog-4897183486294807522.post-79313646229902573962019-02-05T09:17:00.001-08:002019-02-05T10:38:05.495-08:00Sig Cub Electric Free Flight<div class="MsoNormal">
<span style="font-family: "arial" , "helvetica" , sans-serif;">For me there is something fun and challenging about trying
to push something of lower performance to perform at close to an optimum level.
The people that build and race the full-scale solar cell powered cars would be
a good example of this. My challenge has been to build and fly an electric
powered free flight model using the STRIX motor timer, 7 mm coreless electric
motor, and one cell lipo battery of around 200 mah. <o:p></o:p></span></div>
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<tr><td class="tr-caption" style="text-align: center;">Sig Cub Electric </td></tr>
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<span style="font-family: "arial" , "helvetica" , sans-serif;">Constraints of the timer dictate a motor run time of 10
seconds or less, and the size of motor and battery are limited also. I have personally limited myself
to not using a gear drive. The weight of the electrical components is around 12
grams, if I remember correctly. From my experiments with adding the electrical
system to various rubber models I believe optimum wingspan is about 22” to 24”.
The most recent plane that I constructed just for this electric system is the
Sig Cub. Several years ago I had built a Sig Cub for the intended rubber power
and lost it to a thermal with just hand winds.<o:p></o:p></span></div>
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<tr><td style="text-align: center;"><a href="https://1.bp.blogspot.com/-xOjBz7z_NkY/XFnDHBCi8xI/AAAAAAAAVsA/gszCxbZ2CCIYFc6KCeDbf_3DaVmWNbEdACLcBGAs/s1600/SigLakeglide.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" data-original-height="659" data-original-width="960" height="273" src="https://1.bp.blogspot.com/-xOjBz7z_NkY/XFnDHBCi8xI/AAAAAAAAVsA/gszCxbZ2CCIYFc6KCeDbf_3DaVmWNbEdACLcBGAs/s400/SigLakeglide.jpg" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Flying at 23 Degrees F Motor would cut out</td></tr>
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<span style="font-family: "arial" , "helvetica" , sans-serif;">To cut the weight and the drag down further of electric
system I left off the landing gear and cut the height of the pylon down. For
the wing I used 3 mil mylar and then tissue just on the bottom for some color.
The tail surfaces are covered with Esaki tissue and sprayed with an art spray
which someone suggested might help the warping problem. It has not worked well
and at the right conditions the stab starts to look like a potato chip. I did
not pre-shrink tissue, but I think some type of plastic will be used to replace
the tissue on the tail.</span></div>
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<tr><td style="text-align: center;"><a href="https://2.bp.blogspot.com/-7CIxXACOuQw/XFnDXRhc5_I/AAAAAAAAVsM/yxN2vtN6-oUJaQZrvBERblRkeP739BfXgCLcBGAs/s1600/SigTooSteep.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" data-original-height="960" data-original-width="853" height="400" src="https://2.bp.blogspot.com/-7CIxXACOuQw/XFnDXRhc5_I/AAAAAAAAVsM/yxN2vtN6-oUJaQZrvBERblRkeP739BfXgCLcBGAs/s400/SigTooSteep.jpg" width="355" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Launched Too Steep</td></tr>
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<span style="font-family: "arial" , "helvetica" , sans-serif;">Beyond the specifications of the airplane, I try to improve
the flight by constantly tweaking what I can easily adjust on the airplane.
That is position of the wing, rudder trim tab, and angle of launch. To get a
longer flight you want it to climb as steep as possible without stalling and
the plane transitioning from power to glide as close to level as possible. With
this rather weak power package a real steep climb results in bad stalling and a
very short flight. Other times I notice the plane climbing and diving in a very
gentle manner. No doubt it is stalling but by a smaller amount. The best
flights are in a constant climb angle with no hint of a stall with a fairly
large turn radius because too tight a spiral wastes energy also.<o:p></o:p></span></div>
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<tr><td style="text-align: center;"><a href="https://1.bp.blogspot.com/-kAgrRzv8hBI/XFnDj5TtSrI/AAAAAAAAVsQ/LK9zs2QTnQoIZawY0c487MAKl9BkoU89wCLcBGAs/s1600/SigWarmerFLight.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" data-original-height="841" data-original-width="960" height="350" src="https://1.bp.blogspot.com/-kAgrRzv8hBI/XFnDj5TtSrI/AAAAAAAAVsQ/LK9zs2QTnQoIZawY0c487MAKl9BkoU89wCLcBGAs/s400/SigWarmerFLight.jpg" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">This Looks to be Good Altitude for this Power System</td></tr>
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<tr><td style="text-align: center;"><a href="https://4.bp.blogspot.com/-xM4zA90EaDU/XFnD7t5DOcI/AAAAAAAAVsY/JVzTuTtVqfUYOu-G0-9U5y4gBRZ5MpdfgCLcBGAs/s1600/SigCubVerticalFin.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" data-original-height="960" data-original-width="944" height="320" src="https://4.bp.blogspot.com/-xM4zA90EaDU/XFnD7t5DOcI/AAAAAAAAVsY/JVzTuTtVqfUYOu-G0-9U5y4gBRZ5MpdfgCLcBGAs/s320/SigCubVerticalFin.jpg" width="314" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Straight Pins Used on Rudder Trim Tab</td></tr>
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<span style="font-family: "arial" , "helvetica" , sans-serif;">What I like about electric is it is possible to get a large
number of flights in because time is not needed to wind a rubber motor or fill
an engine with fuel. Batteries need to be swapped out fairly quickly however
because performance goes down with multiple runs. What I like about this weak
electric flight is the plane is relatively close in and easier to observe. A negative I have found is that the electric
system does not work well below 30 degrees F, but then that is not great flying
weather either.<o:p></o:p></span></div>
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<span style="font-family: "arial" , "helvetica" , sans-serif;">Bill Kuhl</span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;"><b>Related Links</b></span><br />
<span style="font-family: "arial" , "helvetica" , sans-serif;"><br /></span>
<span style="font-family: "arial" , "helvetica" , sans-serif;"><a href="https://sigmfg.com/products/sigff1-sig-cub-kit%C2%A0" target="_blank">https://sigmfg.com/products/sigff1-sig-cub-kit </a> Sig Cub on Sig Website</span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;"><a href="https://scienceguyorg.blogspot.com/2018/10/experiments-with-strix-free-flight.html">https://scienceguyorg.blogspot.com/2018/10/experiments-with-strix-free-flight.html</a></span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;"><a href="https://scienceguyorg.blogspot.com/2019/01/electric-free-flight-strix-timer-2.html">https://scienceguyorg.blogspot.com/2019/01/electric-free-flight-strix-timer-2.html</a> </span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;">In the video the climb is not consistent all the way up and duration is not as good as it could be. Probably turning a little tight also.</span><br />
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<iframe allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen="" frameborder="0" height="315" src="https://www.youtube.com/embed/X7i1ABm6wzQ" width="560"></iframe>
Scienceguyorghttp://www.blogger.com/profile/17457833204658259656noreply@blogger.com3tag:blogger.com,1999:blog-4897183486294807522.post-82847104609172302662019-01-08T06:56:00.000-08:002019-02-05T11:17:35.026-08:00Adventure with Green Hornet Electric Starter<span style="font-family: "arial" , "helvetica" , sans-serif;">Now that I keep acquiring more ½ A glow engines to power free flight and control line model airplanes, I decided an investment in a ½ A glow starter might be wise. Besides the starter I ordered a couple of new glow clips that are like a clothespin and some metal tanks for control line from Brodak. Last evening I was anxious to try the starter out on an AME .049 that had only been run once before. This time I used a Red Cap bladder cut in half because I did not need the larger capacity.</span><br />
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<tr><td class="tr-caption" style="text-align: center;">AME .049 Did not Run Well on Suction Feed</td></tr>
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<span style="font-family: "arial" , "helvetica" , sans-serif;">First thing I notice was the Hornet starter turns the .049 engine over really fast. Pushing it into the prop nut the prop came lose sending the nut, shaft, and propeller shooting across my messy basement. Luckily I found everything, this time I really tightened it. Yet it kept coming loose. Now I think it had something to do with the fit of the drive washer. After many times of tightening it stayed tight.</span><br />
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<tr><td class="tr-caption" style="text-align: center;">Starter Cone on Hornet 1/2 A Starter</td></tr>
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<span style="font-family: "arial" , "helvetica" , sans-serif;">As I had found out from questions after the first time running this engine, it does need to run on pressure. I did not want to run it for long as this was in my basement but I could tell that it was not having trouble with fuel suction as it did without pressure. I did not put a tach on it but it sounded like it was turning up pretty good. This is with a Cox 5x3 propeller; I have on order the APC props that people recommend for this engine. The new glow clip worked much better than using a Cox clip.</span><br />
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<tr><td style="text-align: center;"><a href="https://2.bp.blogspot.com/-wI1iUqflh4Y/XDS5RPo-1NI/AAAAAAAAVp0/I3Bw3jDHvTAl4vogu1BgK123kP7zi8ZmQCLcBGAs/s1600/GHscrewTest.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" data-original-height="773" data-original-width="1280" height="241" src="https://2.bp.blogspot.com/-wI1iUqflh4Y/XDS5RPo-1NI/AAAAAAAAVp0/I3Bw3jDHvTAl4vogu1BgK123kP7zi8ZmQCLcBGAs/s400/GHscrewTest.jpg" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Bolt Ran into an Obstruction</td></tr>
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<span style="font-family: "arial" , "helvetica" , sans-serif;">After some frustration I was pretty happy that I will be able to start and run this engine without much trouble. As I put stuff away I noticed the aluminum cone on the starter was loose, there was a hole for a set screw but I could not see anything in it. I found a bolt that fit the hole and the threads matched perfectly. It would turn easily but about ¼” in it would stop; now I am worried I broke off a screw inside. Then it dawned on me that the set screw might use an allen wrench to tighten. Sure enough I found the correct size and was able to loosen the set screw and re-tighten the aluminum cone. </span><br />
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<tr><td style="text-align: center;"><a href="https://1.bp.blogspot.com/-9ZGEPr5TITM/XDS5eS6mGYI/AAAAAAAAVp8/GCVhmvUBUdw3f6YoUfu-z4PCmtcu5XibQCLcBGAs/s1600/Allen.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" data-original-height="1134" data-original-width="1280" height="353" src="https://1.bp.blogspot.com/-9ZGEPr5TITM/XDS5eS6mGYI/AAAAAAAAVp8/GCVhmvUBUdw3f6YoUfu-z4PCmtcu5XibQCLcBGAs/s400/Allen.jpg" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Bringing the Set Screw Out</td></tr>
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<span style="font-family: "arial" , "helvetica" , sans-serif;">It appears to me that having the acorn nut used with an electric starter come loose is more of an issue than when I flew glow RC using a plastic spinner years ago. I am afraid if I tighten too tight something could break or strip out. The only prop nut I had for my Witch Hawk 500 came off at the Nats and luckily I found it in the grass. Any suggestions on this are Welcome.</span><br />
<span style="font-family: "arial" , "helvetica" , sans-serif;"><br /></span>
<span style="font-family: "arial" , "helvetica" , sans-serif;">Bill Kuhl</span><br />
<a href="http://www.ideas-inspire.com/"><span style="font-family: "arial" , "helvetica" , sans-serif;">http://www.ideas-inspire.com</span></a><br />
<br />Scienceguyorghttp://www.blogger.com/profile/17457833204658259656noreply@blogger.com0tag:blogger.com,1999:blog-4897183486294807522.post-30422805185748156622019-01-04T11:21:00.000-08:002019-01-14T08:45:59.436-08:00Electric Free Flight STRIX Timer #2<span style="font-family: "arial" , "helvetica" , sans-serif;">I have been having so much fun experimenting with electric free flights using the cheap STRIX motor timer and a 7 mm coreless motor. It will only run up to 10 seconds but that gives you a real good view of how the airplane is flying. You can really notice the slightest stall or if it is turning too tight. Making tiny adjustments to get the climb and glide paths just right can make a huge difference in the height of the climb and length of the glide.</span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;">This winter I finished a new plane for the electric combo a Sig Cub which looks to fly really well but I have been hesitant to make longer flights with it on the hard surfaces. Instead I have been flying a plane I made up from wing and tail of Flying Aces Moth, which is rather beat-up anyways. The wing is angled giving it too much stab tilt but I just do not seem to get around to fix it.</span><br />
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<tr><td class="tr-caption" style="text-align: center;">Sig Cub over Snow</td></tr>
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<a href="https://4.bp.blogspot.com/-7wS5SRyhNzI/XC-xX_1-cqI/AAAAAAAAVoc/cSD3PZwVrQg7noWOZR0wWKVWSenMXNzdgCLcBGAs/s1600/SigCubtopview.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="645" data-original-width="960" height="268" src="https://4.bp.blogspot.com/-7wS5SRyhNzI/XC-xX_1-cqI/AAAAAAAAVoc/cSD3PZwVrQg7noWOZR0wWKVWSenMXNzdgCLcBGAs/s400/SigCubtopview.jpg" width="400" /></a></div>
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<a href="https://1.bp.blogspot.com/-s-ed2NASde0/XC-xeY-NQEI/AAAAAAAAVok/lI1H_0oM2sg7W8bA0sCKnT6h4jUaNhqbACLcBGAs/s1600/SigCubGlide.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="706" data-original-width="960" height="293" src="https://1.bp.blogspot.com/-s-ed2NASde0/XC-xeY-NQEI/AAAAAAAAVok/lI1H_0oM2sg7W8bA0sCKnT6h4jUaNhqbACLcBGAs/s400/SigCubGlide.jpg" width="400" /></a></div>
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<span style="font-family: "arial" , "helvetica" , sans-serif;">The optimum size appears to be about 24" wingspan. Joshua Finn experimented with a plane using STRIX timer that appeared to be around that size. He even tried using the 8.5 mm motor used in E20 planes but found the battery was out of charge real fast. It would be fun to try a geared propeller too and see if the climb improves.</span><br />
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<tr><td class="tr-caption" style="text-align: center;">AMA Maxi Jr Electric</td></tr>
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<tr><td class="tr-caption" style="text-align: center;">Dog Retrieved the Plane and this was the only Damage</td></tr>
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<a href="https://2.bp.blogspot.com/-ul2iwJL3DYI/XC-zAjef1jI/AAAAAAAAVpE/ggypl0hSPkgCZPSG0AEVl3LGoarMQY-6QCLcBGAs/s1600/RochCLimb.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="894" data-original-width="913" height="391" src="https://2.bp.blogspot.com/-ul2iwJL3DYI/XC-zAjef1jI/AAAAAAAAVpE/ggypl0hSPkgCZPSG0AEVl3LGoarMQY-6QCLcBGAs/s400/RochCLimb.jpg" width="400" /></a></div>
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<span style="font-family: "arial" , "helvetica" , sans-serif;">One session flying the FA Moth type plane I had it in lift for a time and was happy it didn't fly any better. Recent flights have been from a frozen lake which gives a huge area to fly from but a crash into the bare ice would not be good. At some point I would like to design my own plane for the electric combo or maybe a couple planes with one using foam sheet.</span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;">The timer is now being sold for $5.99 <a href="https://www.banggood.com/STRIX-3_7V-1S-Free-Flight-Motor-Timer-For-6mm-7mm-Motor-p-1363923.html?akmClientCountry=America&cur_warehouse=CN%C2%A0" target="_blank">https://www.banggood.com/STRIX-3_7V-1S-Free-Flight-Motor-Timer-For-6mm-7mm-Motor-p-1363923.html?akmClientCountry=America&cur_warehouse=CN </a></span><br />
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<b>Joshua Finn video on STRIX timer</b> <a href="https://youtu.be/kBThvOBYUzc%C2%A0" target="_blank"> https://youtu.be/kBThvOBYUzc </a><br />
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First article<br />
<a href="https://scienceguyorg.blogspot.com/2018/10/experiments-with-strix-free-flight.html">https://scienceguyorg.blogspot.com/2018/10/experiments-with-strix-free-flight.html</a><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;">Bill Kuhl</span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;">I had much longer flights than this one but this is close.</span><br />
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<iframe allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen="" frameborder="0" height="315" src="https://www.youtube.com/embed/0qpXSQRprEk" width="560"></iframe>
Scienceguyorghttp://www.blogger.com/profile/17457833204658259656noreply@blogger.com1tag:blogger.com,1999:blog-4897183486294807522.post-83099908353614942312018-12-27T13:25:00.002-08:002018-12-27T13:26:17.449-08:00Thoughts on 2018 Looking to 2019<span style="font-family: "arial" , "helvetica" , sans-serif;">It has been an interesting year, mostly good but not completely, my mother passed away just before Thanksgiving but harder than that was seeing her suffer before it was all over. I enjoyed my hobbies when I could but found time to visit her every weekend and pushed her in the wheelchair either inside or outside the nursing home where she lived. I was so happy to see how nice the other residents were to her even though she seemed rather grumpy at times. It was strange to hear them tell me how proud she was of me, something she never told me which seems typical for her generation. </span><br />
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<tr><td class="tr-caption" style="text-align: center;">New Gollywock Repaired</td></tr>
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<tr><td class="tr-caption" style="text-align: center;">Sig Cub Electric Free Flight</td></tr>
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<tr><td style="text-align: center;"><a href="https://3.bp.blogspot.com/-e5ABZT0CJaI/XCVCod2TgFI/AAAAAAAAVm4/-2owgqyjIFQByWTBoKdzlWg8GHmlylOSwCLcBGAs/s1600/ParkClimb.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" data-original-height="684" data-original-width="960" height="285" src="https://3.bp.blogspot.com/-e5ABZT0CJaI/XCVCod2TgFI/AAAAAAAAVm4/-2owgqyjIFQByWTBoKdzlWg8GHmlylOSwCLcBGAs/s400/ParkClimb.jpg" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Eureka E36 Climbing After Wing Recover</td></tr>
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<span style="font-family: "arial" , "helvetica" , sans-serif;"><br /></span><span style="font-family: "arial" , "helvetica" , sans-serif;">There is so much to do now as I pretty much left everything go but sure glad I did that. By the end of March I plan to have much more time when I retire. I am not counting the days as I enjoy my job and the people I work with, it is just there are things I rather do. Now I realize that all the time can’t be spent building model airplanes as my house is pretty well full now. Related to the model aviation I would like to work more again with young people and the science projects.</span><br />
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<tr><td class="tr-caption" style="text-align: center;">Profile 1/2 A Control -line 2018 </td></tr>
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<span style="font-family: "arial" , "helvetica" , sans-serif;">This fall I repaired some of my free flight model airplanes and started building new ones. Simpler projects first like rocket gliders, sport electric free flight, and a catapult glider. For 2019 I have a good start on the construction of the BMJR Satellite GLH 320 ½ A gas free flight and ¼ A for TeeDee .020 Foo-2. I am also constructing a ½ A control line with built-up wing and fuselage the ½ A Viper.</span><br />
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<tr><td style="text-align: center;"><a href="https://1.bp.blogspot.com/-jrzWPmjZYfc/XCVDMnizT5I/AAAAAAAAVnM/HSATPBKXZjkB-Q7URp5jYGvBNCtcpA2JQCLcBGAs/s1600/WingHalf.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" data-original-height="640" data-original-width="1316" height="193" src="https://1.bp.blogspot.com/-jrzWPmjZYfc/XCVDMnizT5I/AAAAAAAAVnM/HSATPBKXZjkB-Q7URp5jYGvBNCtcpA2JQCLcBGAs/s400/WingHalf.jpg" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Satellite 320 Wing Half</td></tr>
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<span style="font-family: "arial" , "helvetica" , sans-serif;">The other thing I want to expand in writing in the future is just how important science and engineering are to society. It seems emphasis is on athletics and arts but science and engineering is forgotten.</span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;">Bill Kuhl</span><br />
<span style="font-family: "arial" , "helvetica" , sans-serif;"><a href="http://www.ideas-inspire.com/">http://www.ideas-inspire.com</a></span><br />
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Scienceguyorghttp://www.blogger.com/profile/17457833204658259656noreply@blogger.com2tag:blogger.com,1999:blog-4897183486294807522.post-74269341592333443962018-12-03T09:06:00.002-08:002018-12-03T09:06:49.729-08:00Catching Up Almost Month Since Last Post<span style="font-family: Arial, Helvetica, sans-serif;">Outdoor flying in Minnesota has pretty much ended for me and I am trying to repair planes before building new ones for 2019. I have done some quicker builds between repairs; two rocket gliders, Science Olympiad catapult glider, and a Sig Cub setup for electric with STRIX timer. I did get one launch of Aleda R boost glider in the cold that went pretty well, just some stall in the glide. </span><br />
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<tr><td style="text-align: center;"><a href="https://2.bp.blogspot.com/-7PefZg1uMVk/XAVfR5X_ipI/AAAAAAAAVkM/ujOykgS2RtocJDvz44cUUv9lhAGFxia_gCLcBGAs/s1600/NewMylarGolly.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" data-original-height="640" data-original-width="1316" height="193" src="https://2.bp.blogspot.com/-7PefZg1uMVk/XAVfR5X_ipI/AAAAAAAAVkM/ujOykgS2RtocJDvz44cUUv9lhAGFxia_gCLcBGAs/s400/NewMylarGolly.jpg" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">New Gollywock Fuselage Covered with Clear Mylar<br /></td></tr>
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<tr><td class="tr-caption" style="text-align: center;">Esaki Tissue Added</td></tr>
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<span style="font-family: Arial, Helvetica, sans-serif;">My mother passed away a couple of weeks ago and I have been busy with things related to her death. I did get the chance to give a science demo on electric motors, model solar cars, and model wind turbines. Made a visit to an after school class doing Science Olympiad and demonstrated my Protégé catapult glider. I hope to spend more time working with students and science related activities but I do not find much interest in that locally. </span><br />
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<tr><td style="text-align: center;"><a href="https://2.bp.blogspot.com/-CPSQDtJkREE/XAVfyR7BAFI/AAAAAAAAVkc/GPd0w8lmG38YE1Q9I4_Ou3CKx0Gxen_FACLcBGAs/s1600/20181015_191846.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" data-original-height="964" data-original-width="1600" height="240" src="https://2.bp.blogspot.com/-CPSQDtJkREE/XAVfyR7BAFI/AAAAAAAAVkc/GPd0w8lmG38YE1Q9I4_Ou3CKx0Gxen_FACLcBGAs/s400/20181015_191846.jpg" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Aleda R Boost Glider</td></tr>
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<tr><td class="tr-caption" style="text-align: center;">Eureka E36 Short Test Flight</td></tr>
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<span style="font-family: Arial, Helvetica, sans-serif;">Reflecting on my free flight flying this year, I want to improve on my building and covering for next seasons models. I have been trying the tissue over mylar in more models and it is working better for me as I get the tissue attached without loose spots or wrinkles. On my Euerka e36 I recovered the wing with Polyspan lite which keeps the structure rigid in humid conditions but it is hard to fill the covering without using too much dope. I try to spot the places where tiny holes appear instead of so many coats on the whole structure. To get the stick joints closer to perfect in construction I ordered a Fourmost Miter Sander.</span><br />
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<tr><td style="text-align: center;"><a href="https://3.bp.blogspot.com/-CmfT_VAFe_s/XAVgJFXw3tI/AAAAAAAAVkk/Bj6DMpVvps0T8n1qnxCgowcrg3joJq4BgCLcBGAs/s1600/SigCubtopview.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" data-original-height="645" data-original-width="960" height="268" src="https://3.bp.blogspot.com/-CmfT_VAFe_s/XAVgJFXw3tI/AAAAAAAAVkk/Bj6DMpVvps0T8n1qnxCgowcrg3joJq4BgCLcBGAs/s400/SigCubtopview.jpg" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Sig Cub Electric</td></tr>
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<span style="font-family: Arial, Helvetica, sans-serif;">For several years I did not fly any model airplanes powered by a glow engine, only flew gliders or electric. At first I did not miss the mess or the noise but as I got into outdoor competition free flight I wanted to try glow engines again. Part of this was to be able to fly in more events, part has to do with nostalgia, and it is fun working with the engines. A friend even sent me a couple of model diesel engines which will be fun to get running. </span><br />
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<tr><td style="text-align: center;"><a href="https://4.bp.blogspot.com/-N745w3uJoOw/XAVgTE6mPFI/AAAAAAAAVko/dvUWkRiJ2_cPVU-5PMcLOwkXvjD4jWmIwCLcBGAs/s1600/EDHunter.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" data-original-height="853" data-original-width="960" height="284" src="https://4.bp.blogspot.com/-N745w3uJoOw/XAVgTE6mPFI/AAAAAAAAVko/dvUWkRiJ2_cPVU-5PMcLOwkXvjD4jWmIwCLcBGAs/s320/EDHunter.jpg" width="320" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">ED Hunter Diesel</td></tr>
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<tr><td style="text-align: center;"><a href="https://1.bp.blogspot.com/-08UTAyg7Ek0/XAVglpDcYuI/AAAAAAAAVk0/qgOukhq8EkcmuBaDSQxQxp8QHziasADtACLcBGAs/s1600/Medallion049.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" data-original-height="870" data-original-width="960" height="362" src="https://1.bp.blogspot.com/-08UTAyg7Ek0/XAVglpDcYuI/AAAAAAAAVk0/qgOukhq8EkcmuBaDSQxQxp8QHziasADtACLcBGAs/s400/Medallion049.jpg" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Test Running Cox Medallion .049</td></tr>
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<span style="font-family: Arial, Helvetica, sans-serif;">In the back of mind I am thinking of attending a distant free flight contest this winter. Maybe not to fly or maybe fly an event that lends to easy airline travel.</span><br />
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<span style="font-family: Arial, Helvetica, sans-serif;">Bill Kuhl</span></div>
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<span style="font-family: Arial, Helvetica, sans-serif;"><a href="http://www.ideas-inspire.com/">http://www.ideas-inspire.com</a></span></div>
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<b>Related Links</b></div>
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<a href="https://jhaerospace.com/product/protege-science-olympiad-glider-2018-2019-season/%C2%A0" target="_blank">https://jhaerospace.com/product/protege-science-olympiad-glider-2018-2019-season/ </a>Protege SO</div>
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<a href="https://jhaerospace.com/product/aleda-r-boost-glider/%C2%A0" target="_blank">https://jhaerospace.com/product/aleda-r-boost-glider/ </a> Aleda R Boost Glider</div>
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<a href="https://sigmfg.com/collections/free-flight-kits/products/sigff1-sig-cub-kit">https://sigmfg.com/collections/free-flight-kits/products/sigff1-sig-cub-kit</a> Sig Cub Kit</div>
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Scienceguyorghttp://www.blogger.com/profile/17457833204658259656noreply@blogger.com0tag:blogger.com,1999:blog-4897183486294807522.post-5548074538397636132018-11-08T07:31:00.001-08:002018-11-08T07:31:58.464-08:00Importance of Materials in Model Aviation<span style="font-family: Arial, Helvetica, sans-serif;">After the end of the outdoor free flight contest season I have been reflecting on what I need to improve on for the future. I have also spent more time reading and watching videos on history and science. One aspect of my model building that I try to improve on is “materials”. In studying history, the most important discoveries that enabled new innovations, were the discovery of new materials. With the discovery of iron and later improving on this to create steel, so many things could be built or improved on as an example.</span><br />
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<tr><td style="text-align: center;"><a href="https://2.bp.blogspot.com/-iIcYA1dvN-g/W-RUo10QvaI/AAAAAAAAViE/QP_GU0mAlRA1m2T_FS0TWhYZbxXiQ-_QgCLcBGAs/s1600/TopCG.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" data-original-height="791" data-original-width="960" height="328" src="https://2.bp.blogspot.com/-iIcYA1dvN-g/W-RUo10QvaI/AAAAAAAAViE/QP_GU0mAlRA1m2T_FS0TWhYZbxXiQ-_QgCLcBGAs/s400/TopCG.jpg" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Witch Hawk 500 - Polyspan & Silkspan Covering</td></tr>
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<span style="font-family: Arial, Helvetica, sans-serif;">The model airplanes I most enjoy building are built primarily of balsa wood. Balsa is very strong for its weight and great to work with simple hand tools. It does vary in weight and hardness considerably and matching the proper density for the requirements needed in the model construction is critical to build a competitive free flight model. Not paying enough attention to this I have built models that were too heavy or were not strong enough in critical places and broke just from flight loads. Not only is the density of balsa important but also the grain types created by how the balsa was cut from the balsa logs.</span><br />
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<tr><td style="text-align: center;"><a href="https://4.bp.blogspot.com/-tgF75Xn2wpQ/W-RVIDXJGyI/AAAAAAAAViM/upvUqDybSjMfqBuzP6w1GPmzH7nMhSH1QCLcBGAs/s1600/StreakDew.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" data-original-height="640" data-original-width="1316" height="193" src="https://4.bp.blogspot.com/-tgF75Xn2wpQ/W-RVIDXJGyI/AAAAAAAAViM/upvUqDybSjMfqBuzP6w1GPmzH7nMhSH1QCLcBGAs/s400/StreakDew.jpg" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">1/2 A Streak Wing Does Not Sag with Polyspan Lite</td></tr>
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<span style="font-family: Arial, Helvetica, sans-serif;">Another part of the model construction I have been trying to refine is the proper covering material for the type of model I am building. In the past I most often used a plastic iron-on covering when possible, for smaller models it was tissue paper. For the past couple of years I have had a fascination with the older free flight models. With the older designs the structure was lacking the rigidity needed without using a covering material that gave the structure the strength needed. Yet another aspect of the covering selection that became apparent with the past flying season was what humidity did to the covering. Esaki tissue which is really the only choice for many smaller models starts to sag terribly in early morning or late evening when I often fly. Besides taking on extra weight now that the covering is no longer tight on the model, the structure becomes less rigid.</span><br />
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<tr><td style="text-align: center;"><a href="https://1.bp.blogspot.com/-_P8CTk0X9CQ/W-RVesMjQoI/AAAAAAAAViU/nH6iQAEUQ_wQ9eQPtBu6VHIWptUwlUdPQCLcBGAs/s1600/WilburTranslucent.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" data-original-height="779" data-original-width="1600" height="193" src="https://1.bp.blogspot.com/-_P8CTk0X9CQ/W-RVesMjQoI/AAAAAAAAViU/nH6iQAEUQ_wQ9eQPtBu6VHIWptUwlUdPQCLcBGAs/s400/WilburTranslucent.jpg" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Wilbur Center Section Repaired with Tissue over Mylar</td></tr>
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<span style="font-family: Arial, Helvetica, sans-serif;">Last winter in my building I tried covering with Polyspan and using mylar under the Esaki tissue. Polyspan does not change with water; to shrink it heat is used. It only comes in white and needs to be filled with nitrate dope before applying the color. I had purchased airbrush equipment and this worked well for finishing the Polyspan. There is also a Polyspan Lite which is considerably lighter but harder to fill. I used this on smaller gas models; it did stay tight but will puncture easily. </span><br />
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<tr><td style="text-align: center;"><a href="https://1.bp.blogspot.com/-AW5yj0JxHbs/W-RVyC6u6ZI/AAAAAAAAVic/EvhqaR2XwAcvOegoWTO7OUeN5iqFolzpgCLcBGAs/s1600/GollyCoverednotFin.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" data-original-height="624" data-original-width="960" height="260" src="https://1.bp.blogspot.com/-AW5yj0JxHbs/W-RVyC6u6ZI/AAAAAAAAVic/EvhqaR2XwAcvOegoWTO7OUeN5iqFolzpgCLcBGAs/s400/GollyCoverednotFin.jpg" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">New Gollywock Tissue over Mylar</td></tr>
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<span style="font-family: Arial, Helvetica, sans-serif;"><br /></span>
<span style="font-family: Arial, Helvetica, sans-serif;">Many people recommend covering models with ¼ mylar and then covering over this with tissue. It sounded like a lot of work but I did try it on a New Gollywock model I was building. On the first model I believe I did not get the tissue attached properly resulting in loose spots and wrinkles. In doing a repair on center section of Wilbur rubber model I did a better job of sealing the tissue to the mylar. The covering does not sag in humid conditions but the tissue will still take on weight from the water.</span><br />
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<tr><td style="text-align: center;"><a href="https://4.bp.blogspot.com/-aGxNZWGQ0uo/W-RWmz0vmCI/AAAAAAAAVik/CRXQKe-rn8kJ9aYjQEXCiYeazxHYjfa-wCLcBGAs/s1600/EurekaPolyBEfore.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" data-original-height="540" data-original-width="960" height="225" src="https://4.bp.blogspot.com/-aGxNZWGQ0uo/W-RWmz0vmCI/AAAAAAAAVik/CRXQKe-rn8kJ9aYjQEXCiYeazxHYjfa-wCLcBGAs/s400/EurekaPolyBEfore.jpg" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Eureka e36 Wing Recover with Polyspan Lite - Sagging Tissue on Stab</td></tr>
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<span style="font-family: Arial, Helvetica, sans-serif;"><br /></span>
<span style="font-family: Arial, Helvetica, sans-serif;"><br /></span>
<span style="font-family: Arial, Helvetica, sans-serif;">For me the challenges of getting the choices closer to optimum in building an outdoor free flight model is what makes it so fun. No doubt with more experience I will become more uniform on the choices of wood and covering material. What I appreciate with the rules for the classes of free flight models I fly is that I am forced to do this and cannot just buy a high-tech composite model that was constructed in molds.</span><br />
<span style="font-family: Arial, Helvetica, sans-serif;"><br /></span>
<span style="font-family: Arial, Helvetica, sans-serif;">Bill Kuhl</span><br />
<span style="font-family: Arial, Helvetica, sans-serif;"><a href="http://www.ideas-inspire.com/">http://www.ideas-inspire.com</a></span><br />
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Scienceguyorghttp://www.blogger.com/profile/17457833204658259656noreply@blogger.com0tag:blogger.com,1999:blog-4897183486294807522.post-7762381140459435912018-11-02T07:31:00.003-07:002018-11-02T08:48:16.401-07:00Free Flight Fun Projects & Repairs<div class="separator" style="clear: both; text-align: center;">
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<span style="font-family: "arial" , "helvetica" , sans-serif;">After the outdoor free flight contest season has finished I have been busy repairing planes and trying some quick new planes. In a previous post I had mentioned working with the STRIX electric timer and flying on a direct drive 7 mm motor. Last weekend I had some good flights using this setup in an AMA Maxi Jr rubber model converted to electric. As I got the turn circle dialed in the flights became higher lasting about 35 seconds on the 10 second power run. The last flight ended when a dog grabbed the plane by the wing and started to carry it back. Only the tissue was ripped. I have to believe with a lighter plane a minute flight is possible, which would be about perfect for a small flying site.</span><br />
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<tr><td style="text-align: center;"><a href="https://4.bp.blogspot.com/-EV71NoI2FsM/W9xcHYySjOI/AAAAAAAAVgI/9_kl_K8tGeEDtBAegZM57F6gDZUX4xUwACLcBGAs/s1600/NJAPFREcovered.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" data-original-height="810" data-original-width="1440" height="225" src="https://4.bp.blogspot.com/-EV71NoI2FsM/W9xcHYySjOI/AAAAAAAAVgI/9_kl_K8tGeEDtBAegZM57F6gDZUX4xUwACLcBGAs/s400/NJAPFREcovered.jpg" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">NJAPF Fuselage Repaired </td></tr>
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<tr><td style="text-align: center;"><a href="https://2.bp.blogspot.com/-EbLFid6jYb4/W9xcYddIH9I/AAAAAAAAVgQ/4tZDYKbNntwyNJf5Ydlk78zTSKudwbATgCEwYBhgL/s1600/DogAttack.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" data-original-height="540" data-original-width="960" height="225" src="https://2.bp.blogspot.com/-EbLFid6jYb4/W9xcYddIH9I/AAAAAAAAVgQ/4tZDYKbNntwyNJf5Ydlk78zTSKudwbATgCEwYBhgL/s400/DogAttack.jpg" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Only Damage After Carried by Dog</td></tr>
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<tr><td style="text-align: center;"><a href="https://1.bp.blogspot.com/-gmIVYKvW584/W9xc3Ib6eGI/AAAAAAAAVgY/U29sZFJ2ztgQNIJr7QDN8_-FVMNMhZ7EgCLcBGAs/s1600/MaxiLow.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" data-original-height="719" data-original-width="1280" height="223" src="https://1.bp.blogspot.com/-gmIVYKvW584/W9xc3Ib6eGI/AAAAAAAAVgY/U29sZFJ2ztgQNIJr7QDN8_-FVMNMhZ7EgCLcBGAs/s400/MaxiLow.jpg" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">AMA Maxi Jr Electric</td></tr>
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<span style="font-family: "arial" , "helvetica" , sans-serif;">At the last outdoor Minnesota contest I flew my NJAPF p30 and the DT line broke, after the contest I decided it was time to recover the fuselage that had numerous patches. What surprised me a little was there were broken glue joints that the covering had hidden. After repairing the structure and twisting it to check for more questionable joints, I did find more. My plan is to replace the viscous stab DT system with a wing pop off using a fuse.</span><br />
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<tr><td style="text-align: center;"><a href="https://4.bp.blogspot.com/-7VoBY95Xo6A/W9xdN2YDKkI/AAAAAAAAVgg/rjy2IcnomIwJQxfQr_D4LrBAeJN4UbNrgCLcBGAs/s1600/ParkClimb.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" data-original-height="684" data-original-width="960" height="285" src="https://4.bp.blogspot.com/-7VoBY95Xo6A/W9xdN2YDKkI/AAAAAAAAVgg/rjy2IcnomIwJQxfQr_D4LrBAeJN4UbNrgCLcBGAs/s400/ParkClimb.jpg" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Eureka E36 Test Flight after Repairs</td></tr>
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<a href="https://4.bp.blogspot.com/-LWTQ4r2oUSU/W9xdcpymysI/AAAAAAAAVgk/7-PGdf0SCAAGatCuT-JwHh5K2wUdTfaAACLcBGAs/s1600/ParkBank.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="960" data-original-width="940" height="400" src="https://4.bp.blogspot.com/-LWTQ4r2oUSU/W9xdcpymysI/AAAAAAAAVgk/7-PGdf0SCAAGatCuT-JwHh5K2wUdTfaAACLcBGAs/s400/ParkBank.jpg" width="391" /></a></div>
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<span style="font-family: "arial" , "helvetica" , sans-serif;">After a crash at the Nats I finished repairs on my Eureka e36 NOS. The wing was recovered with Polyspan Lite because I did not like the sagging tissue in humid conditions. My repair in one spar in the wing was not adequate as it broke again on the first low level DT landing. This has been repaired and more short flights went well. </span><br />
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<tr><td class="tr-caption" style="text-align: center;">FAC Tic Catapult Gliders</td></tr>
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<tr><td class="tr-caption" style="text-align: center;">G12 Catapult Glider</td></tr>
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<span style="font-family: "arial" , "helvetica" , sans-serif;">A couple of simple catapult gliders were finished the first being the FAC Tic from Easybuilt which comes in a 2-pack. The first one I messed up in that I did not get the dihedral blocked up well when using Testors glue, trying to fix this I did not do the best job either. The second one I used CA and got everything aligned. This glider flies really well for only having a 6” wingspan. I also finished up a second G12 Catapult glider with the flapped trailing edge. Richard Bertrand uses this glider in his Free Flight Rescue program for kids. The glider is stable and can handle a full stretch launch with ¼” rubber.</span><br />
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<tr><td class="tr-caption" style="text-align: center;">Aleda R Boost Glider</td></tr>
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<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://3.bp.blogspot.com/-TJC4Sm-xcLU/W9xeIdIFCEI/AAAAAAAAVg8/sYmbOqaPV-ovPUXx-yw7fkNqvZ3YWzLVwCEwYBhgL/s1600/20181101_182100.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" data-original-height="799" data-original-width="1600" height="198" src="https://3.bp.blogspot.com/-TJC4Sm-xcLU/W9xeIdIFCEI/AAAAAAAAVg8/sYmbOqaPV-ovPUXx-yw7fkNqvZ3YWzLVwCEwYBhgL/s400/20181101_182100.jpg" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Switchblade S Wing Forward<br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;"> For something different I have built two rocket glider kits purchased from J&H Aerospace. One is a boost glider where the motor tube and nose cone separate from a glider. The other is a swing wing glider that has the wing halves move forward when the ejection charge releases the tension on two lines holding the wing halves swept back 90 degrees. This should be fun to see go up.</span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;">I have a new fuselage to build for a New Gollywock and then plan to start building some new models.</span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;">Bill Kuhl</span><br />
<span style="font-family: "arial" , "helvetica" , sans-serif;"><a href="http://www.ideas-inspire.com/">http://www.ideas-inspire.com</a></span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;"><b>Related Links</b></span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;"><a href="https://jhaerospace.com/product/aleda-r-boost-glider/">https://jhaerospace.com/product/aleda-r-boost-glider/</a> Aleda R Boost Glider</span><br />
<span style="font-family: "arial" , "helvetica" , sans-serif;"><a href="https://jhaerospace.com/product/switchblade-s-rocket-glider-kit">https://jhaerospace.com/product/switchblade-s-rocket-glider-kit</a>/ Switchblade S Rocket Glider</span><br />
<span style="font-family: "arial" , "helvetica" , sans-serif;"><a href="https://easybuiltmodels.com/g09.htm" target="_blank">https://easybuiltmodels.com/g09.htm </a>Easy Built FAC Tic catapult glider</span><br />
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Scienceguyorghttp://www.blogger.com/profile/17457833204658259656noreply@blogger.com0tag:blogger.com,1999:blog-4897183486294807522.post-55831326137052582892018-10-22T13:36:00.002-07:002018-10-22T13:38:47.786-07:00Dewey Bird Control Line Adventures 2018<span style="font-family: "arial" , "helvetica" , sans-serif;">My first real start in model aviation was with ½ A control line planes, I remember building a Carl Goldberg Stuntman 23 when I was 9 years old. Last year in the fall I was trying to fly an electric control line for the first time after no control line flying for many years. I was running out of warm weather and tried to fly in too much wind with too long of lines. The plane was repaired and flown successfully but it looked like this plane was rather fragile to be crashing from beginner mistakes, so over the winter I built a Sig ½ A Dewey Bird to be powered with a Cox Babe Bee .049. </span><br />
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<tr><td class="tr-caption" style="text-align: center;">1/2 A Dewey Bird</td></tr>
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<tr><td class="tr-caption" style="text-align: center;"><span style="font-family: "arial" , "helvetica" , sans-serif;">Bottom of Piston shows Where Connecting Rod Came Apart</span></td></tr>
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<span style="font-family: "arial" , "helvetica" , sans-serif;">The Cox Babe Bee is another story, I saw it on a hobby shop counter. The owner said it didn't run and that I could have it. It felt like something was broken, it turned out the connecting rod had ripped out of where it connects to the piston. I thought maybe it had over heated as it had a 7-6 wood propeller on it but people tell me larger propellers are run on .049's for Texaco event. I found a piston in my junk parts collection and the engine ran great.</span><br />
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<tr><td class="tr-caption" style="text-align: center;"><span style="font-family: "arial" , "helvetica" , sans-serif;">Dewey Bird in Stooge</span></td></tr>
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<tr><td class="tr-caption" style="text-align: center;"><span style="font-family: "arial" , "helvetica" , sans-serif;">Electric Control Line</span></td></tr>
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<span style="font-family: "arial" , "helvetica" , sans-serif;">Free flight kept me really busy for most of the summer but after the Nats I fly my Dewey Bird for first time. There was no one to help so I made a stooge using a couple pieces of wood in a drillpress vise. I was using 35' .012 metal lines which I had from childhood. I think 26' lines are recommended, it flew on the long lines but tension was not great. Next time out I flew the Dewey Bird on 26 foot Spider wire lines which were better but it was really gusty that day. It was a good lesson in keeping the line tight when a gust hit it. For the next time flying, I added sidethrust and moved leadouts back. It might have helped a little. Again I tried to loop and stepped backwards really quick to try to regain tension. I tripped in the tall grass and fell on my butt. One more try and the plane went around once but lost tension and went up for another loop but crashed on the bottom. Only broke the propeller but I fell again.</span><br />
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<tr><td style="text-align: center;"><a href="https://4.bp.blogspot.com/-wxQ-JfBUirU/W84x4b8btxI/AAAAAAAAVew/qpEslfDon1IY0GtM0_GNFu1IoPQtS2sdQCLcBGAs/s1600/20180930_184554.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><span style="font-family: "arial" , "helvetica" , sans-serif;"><img border="0" data-original-height="1600" data-original-width="778" height="400" src="https://4.bp.blogspot.com/-wxQ-JfBUirU/W84x4b8btxI/AAAAAAAAVew/qpEslfDon1IY0GtM0_GNFu1IoPQtS2sdQCLcBGAs/s400/20180930_184554.jpg" width="193" /></span></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;"><span style="font-family: "arial" , "helvetica" , sans-serif;">Damage from Slack Lines</span></td></tr>
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<span style="font-family: "arial" , "helvetica" , sans-serif;"> Next time out I tried loops twice and crashed but no damage. Then I leaned the motor out more, I was afraid it would get too lean in the air but it didn't. Now tension was better, I tried a loop and it went around easy with plenty of room to spare. Tried it again and it went around fine. Fly more laps and then decided to try one more time but hesitated and the plane went into the wind and there was slack in the lines. The crash did damage this time, it only took a few minutes to fix when I got home. </span><br />
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<tr><td style="text-align: center;"><a href="https://4.bp.blogspot.com/-unFJ5Z5jKE4/W84xS_hxGlI/AAAAAAAAVec/NXtksJrDiAcyZJL4sDDO0DfDNTNLhPCTgCLcBGAs/s1600/deweypennychip.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><span style="font-family: "arial" , "helvetica" , sans-serif;"><img border="0" data-original-height="640" data-original-width="1316" height="193" src="https://4.bp.blogspot.com/-unFJ5Z5jKE4/W84xS_hxGlI/AAAAAAAAVec/NXtksJrDiAcyZJL4sDDO0DfDNTNLhPCTgCLcBGAs/s400/deweypennychip.jpg" width="400" /></span></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;"><span style="font-family: "arial" , "helvetica" , sans-serif;">Add Weight to Tail to Move CG Back</span></td></tr>
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<span style="font-family: "arial" , "helvetica" , sans-serif;">Now it gets dark so early and it has been windy for a couple of weeks. One evening I flew my electric control line again and it flew well. Then tension is much better with this plane but I still want to get more practice with the ½ A. I still have a Carl Goldberg Buster with a Fox .35 on it from my childhood I want to fly that again also. </span><br />
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<tr><td style="text-align: center;"><a href="https://4.bp.blogspot.com/-ammNif3W9Xc/W84xht39pcI/AAAAAAAAVek/-OaQVAmafDgfhebOE7KWudp3PnE279kgwCLcBGAs/s1600/Buster.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><span style="font-family: "arial" , "helvetica" , sans-serif;"><img border="0" data-original-height="749" data-original-width="1024" height="292" src="https://4.bp.blogspot.com/-ammNif3W9Xc/W84xht39pcI/AAAAAAAAVek/-OaQVAmafDgfhebOE7KWudp3PnE279kgwCLcBGAs/s400/Buster.jpg" width="400" /></span></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;"><span style="font-family: "arial" , "helvetica" , sans-serif;">Goldberg Buster</span></td></tr>
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<span style="font-family: "arial" , "helvetica" , sans-serif;">I realize it would no doubt be easier to learn aerobatic maneuvers with a larger plane; at this point I am just too afraid of crashing a larger plane. There is also the challenge of pushing for higher performance with a small plane. </span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;">Bill Kuhl</span></div>
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<span style="font-family: "arial" , "helvetica" , sans-serif;"><a href="http://www.ideas-inspire.com/">http://www.ideas-inspire.com</a></span></div>
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<a href="https://scienceguyorg.blogspot.com/2017/11/adventures-in-electric-control-line.html%C2%A0" target="_blank"><span style="font-family: Arial, Helvetica, sans-serif;">https://scienceguyorg.blogspot.com/2017/11/adventures-in-electric-control-line.html </span></a><br />
<span style="font-family: Arial, Helvetica, sans-serif;">Electric Control Line Story</span></div>
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Scienceguyorghttp://www.blogger.com/profile/17457833204658259656noreply@blogger.com0tag:blogger.com,1999:blog-4897183486294807522.post-34942224522151120452018-10-17T08:00:00.003-07:002018-12-12T14:29:40.714-08:00Experiments with STRIX Free Flight Electric Motor Timer<span style="font-family: "arial" , "helvetica" , sans-serif;">In the past few weeks I have been experimenting with using a small electric motor timer that I purchased from the RMRC company for under $7. An online friend had sent me a link to this and I ordered a couple of the timers. After receiving the timer I discovered it used the larger JST 2.0 plug in connecting to the battery, so another order was placed for a couple of batteries and a charger that fits this connector. The connector is slightly larger than the connector used on the Eflite planes I have. In the future I want to replace the connector on the timer with the more standard connector on a sample timer. This would make it possible to use batteries and chargers that many people already have.</span><br />
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<tr><td class="tr-caption" style="text-align: center;">Electric Powered Guillow's Cloud Buster</td></tr>
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<tr><td class="tr-caption" style="text-align: center;">STRIX Timer, motor, and battery</td></tr>
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<span style="font-family: "arial" , "helvetica" , sans-serif;">My first test aircraft was an injected foam glider the Guillow’s Skyraider, the motor was mounted on a pylon I constructed out of balsa, everything held together with low temperature hot glue. The total weight was 56 grams which is too heavy for much of a climb. For a propeller I used one from an Aero Ace biplane I had, it did not overheat the motor like when trying an E20 size propeller. The specifications of the timer call for 6 mm or 7 mm motor, I used 7 mm motors from RMRC which come for in packages of four motors, two wired for clockwise and two counter-clockwise. </span><br />
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<tr><td class="tr-caption" style="text-align: center;">Robbed the Propellers</td></tr>
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<tr><td class="tr-caption" style="text-align: center;">Comparison of Plug Sizes</td></tr>
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<tr><td class="tr-caption" style="text-align: center;">Charging Board and AC Power Supply, can use Lipo Battery 3S or 4S</td></tr>
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<span style="font-family: "arial" , "helvetica" , sans-serif;">The foam glider might be great if it were lighter, the first flights it only got maybe 20 feet high. I removed some foam from the glider and it started climbing higher. The stability was just okay, it tended to wander around in the sky but it always survived a hard landing.</span><br />
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<tr><td class="tr-caption" style="text-align: center;">Electric Foam Glider</td></tr>
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<span style="font-family: "arial" , "helvetica" , sans-serif;">For the next plane I wanted to try a balsa plane with a really simple structure, I found a Super Dart in my basement which is similar to Sig Thermal Dart, flat pointy wings. A real short test fight with timer a battery taped on showed that this will climb better with a total weight of 23 grams. The weather has turned windy all the time which is bad for test flying. After another flight in the wind the second flight resulted in the fuselage breaking in multiple places. In the future would like to try this with a basswood fuselage as I would like to find really simple planes for the electric setup.</span><br />
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<tr><td class="tr-caption" style="text-align: center;">Super Dart Crash Damage</td></tr>
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<span style="font-family: "arial" , "helvetica" , sans-serif;">As I see this timer/motor setup, it would be good for kids flying in a schoolyard, the maximum run is only 10 seconds. You can select between 5,8, or 10 seconds very easily. With the battery that I found to fit the connector at 220 mah it will give many flights on a single charge. The battery is rather heavy at 6 grams, timer 3 grams, and motor at 3 grams. The increased weight over a rubber motor would explain why crashes on models designed for rubber power would be more damaging. </span><br />
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<tr><td class="tr-caption" style="text-align: center;">Cloud Buster Electric</td></tr>
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<span style="font-family: "arial" , "helvetica" , sans-serif;">The last model I have tried was a Guillow’s Cloud Buster built a long time ago. I think this model will work well but again I tried to fly it in way too much wind. First short flight it went too much right but recovered. I added too much weight on left wingtip to correct on second flight and it hit the ground in a left spiral dive breaking the pylon. I started building a new pylon that I can mount the timer and battery inside and have the wing held on by rubber bands. This type of model I have to believe should climb high enough to glide around for an additional 30 seconds or more. Kids do not even have to wind the rubber which should not be a big deal but I find some have trouble. I am looking for other sources of motors and propellers at an inexpensive price. I will write another article as I progress with this farther.</span><br />
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<tr><td class="tr-caption" style="text-align: center;">Crash in Progress</td></tr>
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<tr><td class="tr-caption" style="text-align: center;">Rebuilding Pylon</td></tr>
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<span style="font-family: "arial" , "helvetica" , sans-serif;"><b>Update 10/18/2018</b></span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;">It was relatively calm this morning as the sun was coming up but there was frost in the grass. I was determined to get in more test flights on the Cloud Buster I rebuilt the pylon for with the wing now held by a rubber band before work. First flight at 5 seconds looked alright so went to 8 seconds. The plane had too much right turn, adding clay to wingtip had it going straight with a series of small stalls, taking a small amount off it was better but it seemed to easily circle either direction. The plane climbs but not very steep, I think more wing area might help. Someone suggested the AMA Maxi Jr might work which I have and will probably try, it has a constant chord wing. The Cloud Buster tapers to thin at the tips. If I used a lighter battery I think that would help too.</span><br />
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<tr><td style="text-align: center;"><a href="https://1.bp.blogspot.com/-qvUnK-DjCJ8/W8iK0dm84-I/AAAAAAAAVd8/bF7VfHl_yDANfckKNBR_3_3mRyWLjMHlQCLcBGAs/s1600/20181018_075521.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" data-original-height="836" data-original-width="1600" height="208" src="https://1.bp.blogspot.com/-qvUnK-DjCJ8/W8iK0dm84-I/AAAAAAAAVd8/bF7VfHl_yDANfckKNBR_3_3mRyWLjMHlQCLcBGAs/s400/20181018_075521.jpg" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Cloud Buster with New Pylon</td></tr>
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<span style="font-family: "arial" , "helvetica" , sans-serif;"><br /></span><span style="font-family: "arial" , "helvetica" , sans-serif;"><b>12/11/2018</b> - Sig Cub Electric</span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;">Bill Kuhl</span><br />
<span style="font-family: "arial" , "helvetica" , sans-serif;"><a href="http://www.ideas-inspire.com/">http://www.ideas-inspire.com</a></span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;"><b>Related Links</b></span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;"><a href="https://www.readymaderc.com/products/details/strix-free-flight-motor-timer">https://www.readymaderc.com/products/details/strix-free-flight-motor-timer</a> Link to Timer</span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;"><a href="https://www.guillow.com/skyraider.aspx?fbclid=IwAR0SfrzjxBnE65FCku_MfoVtW3UlShyPUQRYGQ5_-Kr36en5CPV7TcFUusI%C2%A0" target="_blank">https://www.guillow.com/skyraider.aspx?fbclid=IwAR0SfrzjxBnE65FCku_MfoVtW3UlShyPUQRYGQ5_-Kr36en5CPV7TcFUusI </a> </span><br />
<span style="font-family: "arial" , "helvetica" , sans-serif;">Foam Guillow's Glider</span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;"><a href="https://www.guillow.com/cloudbuster.aspx%C2%A0" target="_blank">https://www.guillow.com/cloudbuster.aspx </a> Guillow’s Cloud Buster</span><br />
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<iframe allow="autoplay; encrypted-media" allowfullscreen="" frameborder="0" height="315" src="https://www.youtube.com/embed/amqAw0IFiNo" width="560"></iframe>
Scienceguyorghttp://www.blogger.com/profile/17457833204658259656noreply@blogger.com0tag:blogger.com,1999:blog-4897183486294807522.post-19871738776576041902018-10-08T08:50:00.002-07:002018-10-09T08:16:29.333-07:00Last 2018 Free Flight Contest Minnesota<div class="separator" style="clear: both; text-align: center;">
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<span style="font-family: "arial" , "helvetica" , sans-serif;">I was so close to not attending the last 2018 outdoor free flight contest in Minnesota because of the wind prediction and threat of rain. It was cool, dark, and windy at times but the direction gave a good deal of room to drift without getting into trees or corn. For me it was one small problem after another but I still had a great time. At least I should have more time now to get my equipment better prepared for next year.</span><br />
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<a href="https://2.bp.blogspot.com/-bIjU2UvoJYg/W7t5hTGvHjI/AAAAAAAAVZ0/AaYEZ9X9qIwYZv0EbTq62sjKFQxLSafoQCLcBGAs/s1600/WinderProblem.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="816" data-original-width="1280" height="255" src="https://2.bp.blogspot.com/-bIjU2UvoJYg/W7t5hTGvHjI/AAAAAAAAVZ0/AaYEZ9X9qIwYZv0EbTq62sjKFQxLSafoQCLcBGAs/s400/WinderProblem.jpg" width="400" /></a></div>
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<tr><td style="text-align: center;"><a href="https://3.bp.blogspot.com/-ZhBzPhwU2AI/W7zGCnENs4I/AAAAAAAAVbQ/OyDaQ6VCYW47XsBqdfuW0NHSOHHN1q0CQCLcBGAs/s1600/20181007_181618.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" data-original-height="745" data-original-width="1024" height="290" src="https://3.bp.blogspot.com/-ZhBzPhwU2AI/W7zGCnENs4I/AAAAAAAAVbQ/OyDaQ6VCYW47XsBqdfuW0NHSOHHN1q0CQCLcBGAs/s400/20181007_181618.jpg" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">First Wilbur Flight was high enough for prop to fold</td></tr>
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<span style="font-family: "arial" , "helvetica" , sans-serif;">To start flying I decided to take out my Wilbur rubber model that normally flies great but has had issues at the last two contests. Two months ago the center of the wing folded on launch and last contest it would barely climb. The blades were loose on the hub which I repaired and it climbed better in test flight but I did not get up to full winds. At this contest the counter on my winder came loose and the screw was stripped out so I had to count winds and with weird gear ratio that isn’t easy. First test flight it did better than when the blades were loose but after that it just got worse.</span><br />
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<tr><td style="text-align: center;"><a href="https://1.bp.blogspot.com/-nja0jgY9vfU/W7t8n_9CuxI/AAAAAAAAVbE/KwTdOv1gbHAJdfKiFV0cX5gRa3AwneAhQCLcBGAs/s1600/bearingpackage.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" data-original-height="1100" data-original-width="844" height="400" src="https://1.bp.blogspot.com/-nja0jgY9vfU/W7t8n_9CuxI/AAAAAAAAVbE/KwTdOv1gbHAJdfKiFV0cX5gRa3AwneAhQCLcBGAs/s400/bearingpackage.jpg" width="306" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Bearing that is Dragging</td></tr>
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<span style="font-family: "arial" , "helvetica" , sans-serif;">When I picked up the model with turns left the propeller would barely turn over. The metal sleeve that goes into noseblock hole was loose because it was trying to turn in the balsa. Someone squirted some fuel into the ball bearing thrust bearing that appeared to be dragging. After I glued the sleeve I tried a couple more flights and result was the same. When I got home I looked closer at the ball bearing and it seemed like the two sides of the bearing could be wiggled apart farther than the same type of bearing in another airplane. At times it appeared to turn real hard but not all the time. Replacing the bearing would not be easy as the propeller shaft would have to be broken loose in front where it attaches to the hub.</span><br />
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<tr><td style="text-align: center;"><a href="https://1.bp.blogspot.com/-E3TrJ9sv_Dg/W7t5wowvh5I/AAAAAAAAVZ4/aWcEwSUekKorW73cQNLUARiWaKHItOWdgCLcBGAs/s1600/20181007_115714.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" data-original-height="793" data-original-width="1280" height="247" src="https://1.bp.blogspot.com/-E3TrJ9sv_Dg/W7t5wowvh5I/AAAAAAAAVZ4/aWcEwSUekKorW73cQNLUARiWaKHItOWdgCLcBGAs/s400/20181007_115714.jpg" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">P30 Still on the Field</td></tr>
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<span style="font-family: "arial" , "helvetica" , sans-serif;">For the P30 event I brought my older NJAPF p30 along because I didn’t want to risk my Polecat X in the wind. The fuselage really needs a recovering but the DT line broke just as I tried to wrap it around the rear peg. I didn’t have any line along so I bypassed the DT and hoped for the best. I did not wind it too much because I did not have a counter but I did have a torque meter for P30. Problem was I was not sure what torque would break the rubber. At least I got in 3 official flights and did not lose the model.</span><br />
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<tr><td style="text-align: center;"><a href="https://3.bp.blogspot.com/-nmdGHBxQBLM/W7t6H2wZAlI/AAAAAAAAVaE/bxa_O9QHXiInfVacxRVWkJIUNdbwrgNXQCLcBGAs/s1600/P30NoDT.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" data-original-height="528" data-original-width="1028" height="205" src="https://3.bp.blogspot.com/-nmdGHBxQBLM/W7t6H2wZAlI/AAAAAAAAVaE/bxa_O9QHXiInfVacxRVWkJIUNdbwrgNXQCLcBGAs/s400/P30NoDT.jpg" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">No DT Sunday P30</td></tr>
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<span style="font-family: "arial" , "helvetica" , sans-serif;">There was another guy flying P30 that did not use a DT because he thought the popoff wing line was causing a trim problem. He made a joke about it being “no DT Sunday” and needing to build a new model. I timed his flight and the model really climbed high, it must have been in enough lift to maintain although it wasn’t climbing any higher. After 2 ½ minutes I lost sight of it but he was able to find the model without a tracker. </span><br />
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<tr><td style="text-align: center;"><a href="https://3.bp.blogspot.com/-Zkl4I1-W7PQ/W7t6bsI3CtI/AAAAAAAAVaM/mJGwMcy1EjsxMIQB3jKi1FvceBDe9WTpwCLcBGAs/s1600/StreakbyPuddle.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" data-original-height="580" data-original-width="1024" height="226" src="https://3.bp.blogspot.com/-Zkl4I1-W7PQ/W7t6bsI3CtI/AAAAAAAAVaM/mJGwMcy1EjsxMIQB3jKi1FvceBDe9WTpwCLcBGAs/s400/StreakbyPuddle.jpg" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">1/2 A Streak Missed Puddle</td></tr>
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<span style="font-family: "arial" , "helvetica" , sans-serif;">I flew my ½ A Streak after that just for fun. It was a little harder getting the glow motor running at 50 degrees than when it is 80 degrees. The needle valve needed some adjusting but then it ran well and pulled the plane to a good height. Transition was good and the glide did not stall and was in a gentle right circle, just came down too fast.</span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;">My DLG changed trim from last time flying, thought I was getting it readjusted and then it crashed. </span><span style="font-family: "arial" , "helvetica" , sans-serif;">Like every contest the time just went too fast, I leave rather early because it is a 3 hour drive home. Closing with more pictures from the contest.</span><br />
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<tr><td class="tr-caption" style="text-align: center;">Gary Oakin's Rubber Model</td></tr>
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<tr><td class="tr-caption" style="text-align: center;">Dave Braun's Scale Model Did not Like the Wind<br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;">Bill Kuhl</span><br />
<span style="font-family: "arial" , "helvetica" , sans-serif;"><a href="http://www.ideas-inspire.com/">http://www.ideas-inspire.com</a></span><br />
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<br />Scienceguyorghttp://www.blogger.com/profile/17457833204658259656noreply@blogger.com0tag:blogger.com,1999:blog-4897183486294807522.post-29097742957677080982018-10-01T13:53:00.002-07:002018-10-02T19:54:36.016-07:00Witch Hawk 500 Free Flight Story<span style="font-family: "arial" , "helvetica" , sans-serif;"> In the Fall of 2016 I purchased the Witch Hawk 500 kit from BMJR because I wanted to try a larger glow powered free flight, at that time my only glow powered free flight was Cox PeeWee .020 powered. For 2017 the Witch Hawk was to be the One Design Plane at 2017 Nats. I didn’t get mine built for 2017 Nats and barely finished for 2018 Nats. </span><br />
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<tr><td class="tr-caption" style="text-align: center;">2018 Nats Before Picture</td></tr>
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<span style="font-family: "arial" , "helvetica" , sans-serif;">Building a larger kit went easier than a small one in that it is harder to break pieces during construction but I had new things to try with this project. I covered it with Polyspan which I had only done before on parts of models, it went pretty well other than trying to find the shiny side. The fuselage was covered with silkspan. I decided last winter I would like to try an airbrush so I ordered the components for a system; it needed some brass fittings for connections. Local auto supply store helped me with that. I sprayed it with the dye that Larry Davidson sells and that went well. For this large of model, a larger airbrush might have been better but it worked.</span><br />
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<tr><td class="tr-caption" style="text-align: center;">Under Construction</td></tr>
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<tr><td class="tr-caption" style="text-align: center;">Airbrush Compressor</td></tr>
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<span style="font-family: "arial" , "helvetica" , sans-serif;">For a larger glow model running on pressure I needed an electric starter attached to a stand, as I have a small car this had to be compact. I found a plastic stool that folded flat and attached my starter and connections to that. To turn it on and off I ordered a trolling motor foot switch.. This was the first time running pressure and I decided to use a Red Cap bladder for my K&B .19 engine with original needle valve. I ran it on a test stand first and it ran pretty well.</span><br />
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<tr><td class="tr-caption" style="text-align: center;">Starter Setup</td></tr>
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<span style="font-family: "arial" , "helvetica" , sans-serif;">Before the 2018 Nats I had just enough time for some test glides and to run the motor on the plane. At the Nats I picked the first really calm day to test fly. I was nervous, just sure something would go wrong. First short flight it went straight ahead; stalled and came down breaking the propeller. Added tiny bit of rudder trim, next flight went up and transitioned nice but with no wind it glided back into pit area and hit a golf cart. It broke the wing in half but worse than that broke the scroll off my Texas Timer Max IIIa timer.</span><br />
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<tr><td class="tr-caption" style="text-align: center;">First Short Flight</td></tr>
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<tr><td class="tr-caption" style="text-align: center;">Flew Through Golf Cart</td></tr>
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<tr><td class="tr-caption" style="text-align: center;">Broken Timer</td></tr>
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<tr><td class="tr-caption" style="text-align: center;">Broken Wing</td></tr>
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<span style="font-family: "arial" , "helvetica" , sans-serif;">Back closer to home I do not have very large flying fields to use so I made the decision to install RC for motor cutoff and RDT. Later I could install an electronic timer to control the servos. To cut the motor, Greg Stewart gave me the great idea to use a valve made for RC smoke systems, Dubro sold this but I had to order through eBay to find one. Fixing the wing was a fair amount of work but it looked pretty good even after spray paint.</span><br />
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<tr><td class="tr-caption" style="text-align: center;">RC Install</td></tr>
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<tr><td class="tr-caption" style="text-align: center;">Recover After Repair</td></tr>
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<span style="font-family: "arial" , "helvetica" , sans-serif;">As the flying season is winding down I wanted to fly it again, Saturday morning was darn near calm but there was frost on the ground. I had a little trouble getting the motor running and when I did it was surging a little. I launched it anyway and it went straight ahead and climbed darn near straight up. If it looked like there was any sign it would crash I would cut the motor. It climbed fine so I cut it when it was getting fairly high, it stalled straight ahead but had plenty of altitude to recover and as it leveled out it went into a nice glide to the right and landed. </span><br />
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<tr><td class="tr-caption" style="text-align: center;">Frost in the Grass</td></tr>
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<span style="font-family: "arial" , "helvetica" , sans-serif;">My hands were cold and I needed to be somewhere so I did not fly it again. I was really happy. I know people have told me larger free flights are easier than small ones but I know they can crash harder also.</span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;">Bill Kuhl</span></div>
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Scienceguyorghttp://www.blogger.com/profile/17457833204658259656noreply@blogger.com2tag:blogger.com,1999:blog-4897183486294807522.post-24427173414422626672018-09-11T10:35:00.002-07:002018-09-11T10:50:43.534-07:00Cox Tee Dee .010 and Nostalgia Thoughts<span style="font-family: "arial" , "helvetica" , sans-serif;">Jokingly I sometimes tell people I started my second childhood early; that is why I play with model airplanes. Besides reliving my childhood I try to experience the good times in the past that other people enjoyed with model airplanes that I missed out on, mainly free flight model airplanes. I have built some of the older free flight planes and acquired older glow engines as well CO2 engines. </span><br />
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<a href="https://2.bp.blogspot.com/-3ZBWzHqtfZk/W5f8z4gkVjI/AAAAAAAAVWc/HtZGjrCLipAna4_Clzvj3Sow654txExLwCLcBGAs/s1600/hankOldTimeGas.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="570" data-original-width="800" height="285" src="https://2.bp.blogspot.com/-3ZBWzHqtfZk/W5f8z4gkVjI/AAAAAAAAVWc/HtZGjrCLipAna4_Clzvj3Sow654txExLwCLcBGAs/s400/hankOldTimeGas.jpg" width="400" /></a></div>
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<span style="font-family: "arial" , "helvetica" , sans-serif;">In free flight I prefer the smaller glow powered planes and there are events that require a Cox TeeDee .020 engine that is no longer being manufactured. I have been having a great time flying a Cox PeeWee .020 powered PeeWee 30 free flight model, so thought I might try .020 Replica or Payload event. I have two Cox .020 TeeDees on the way and also two Cox .010 TeeDees. From my childhood I can remember gazing at a Cox TeeDee .010 in hobby shop display case but it was just too expensive for a kid.</span><br />
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<tr><td class="tr-caption" style="text-align: center;">PeeWee .020 Powered Free Flight</td></tr>
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<span style="font-family: "arial" , "helvetica" , sans-serif;">Last year I started flying an electric powered control line model but after crashing on the first flight because of the wind and too long of lines, I decided to build ½ A model powered with Cox Babe Bee. This was my first real start in model aviation at 10 years old. Like almost everyone says remembering the fun with model aviation in their childhood, these were great memories. Last week I flew my ½ A Dewey Bird for the first time but I had used too heavy metal lines that were maybe too long also. As an adult, I want to take this a little more serious and get details dialed in closer to the optimum.</span><br />
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<tr><td class="tr-caption" style="text-align: center;">Dewey Bird 1/2 A Control Line</td></tr>
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<span style="font-family: "arial" , "helvetica" , sans-serif;">There appears to be a good amount of interest by many people in acquiring items from the past, I read this article from Forbes and quoted this explanation:</span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;">“As such many people have looked back to simpler times and been attracted to products from that past that remind them of when life wasn’t so complicated.</span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;">This interest continues with more new “old” products where people just want something that is straightforward, basic, and tangible in a way that modern technology just can’t offer.”</span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;"><a href="https://www.forbes.com/sites/steveolenski/2016/08/04/nostalgia-sells-capitalizing-on-the-desire-for-simpler-times/#55fb5b6023e3">https://www.forbes.com/sites/steveolenski/2016/08/04/nostalgia-sells-capitalizing-on-the-desire-for-simpler-times/#55fb5b6023e3</a></span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;">I watched this video about flying some old plastic ½ A control lines and found the comments very interesting. The theme that was repeated was how great the memories were and many of the kids that did this did well in later life.</span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;">Antique Cox Control Line Plane's History and flights by NightFlyyer </span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;"><b>Sample of Comments:</b></span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;">“Everyone I know who flew these as a kid, grew up to be decent, hard working people. Great memories.”</span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;">“You know what ? you are so correct i am an engineer repairing photo copiers, like all my friends who i used to fly with we are all engineers owning our own homes all worked hard all our lives so true.”</span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;">“ After reading your comment, I did a quick mental role call, and 6 out of 7 of my friends that flew these, were and are successful. 2 became airline pilots, one worked at JPL and all were successful and respected in their given fields.”</span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;"> Bill Kuhl</span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;"><a href="http://www.ideas-inspire.com/">http://www.ideas-inspire.com</a></span><br />
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Scienceguyorghttp://www.blogger.com/profile/17457833204658259656noreply@blogger.com0tag:blogger.com,1999:blog-4897183486294807522.post-12267779321843645642018-09-07T13:38:00.001-07:002018-09-07T13:39:24.201-07:00Witch Hawk Repair & RDT<span style="font-family: "arial" , "helvetica" , sans-serif;">I was reading an exchange on Facebook recently that started out with someone giving a negative opinion of the use of Remote DT in free flight competition. This is not the first time I have heard comments like this and I can understand why people feel that way. Some people didn’t even like the idea of trackers but I think for the majority of the free flight population trackers are essential equipment. </span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;">The longer I fly free flight airplanes the more I appreciate the challenge of making a model airplane fly with no control from the ground. It can be a lot harder than it looks to get a model adjusted to fly consistently without control. At times it is frustrating not to be able to save the model from a spiral into the ground that results in more repairs. The rational for not liking RDT was the model was not truly flying free if you could bring it down at will; they also liked the thrill of the complete chase of the model. Another comment that came up was a dislike for auto surfaces, something I doubt I will get to that level in model complexity to use.</span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;">In my Witch Hawk 500 that broke the wing in half at 2018 Nats I am installing RC for DT and to cut the engine. When I feel the plane is trimmed I will attach an electronic timer to the engine cut off servo. The largest field I fly from in local area is 44 acres and the field has trees and powerline around the edges. Flying at the Minnesota contest field there are trees on one side that I really want to stay out of.</span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;">I was checking on eBay for mechanical timers and did not see a single Texas Timers timer, really not much of anything. Also looking for a Cox TeeDee .020 and have gotten my bid up way higher than I wanted too.</span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;">Last evening I did fly the Dewey Bird ½ A control line model. I made a really crude stooge to release it with but it worked okay. The lines I had .012 were too heavy and maybe too long at 35’, tension was not great but then it is a small model. With my free flight experience I am getting more concerned with details, finding out the hard way details matter.</span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;">Bill Kuhl</span><br />
<a href="http://www.ideas-inspire.com/"><span style="font-family: "arial" , "helvetica" , sans-serif;">http://www.ideas-inspire.com</span></a><br />
<br />Scienceguyorghttp://www.blogger.com/profile/17457833204658259656noreply@blogger.com2tag:blogger.com,1999:blog-4897183486294807522.post-56944161286350031752018-08-31T08:47:00.001-07:002018-08-31T11:18:28.953-07:00Learning From Model Aviation & New Challenges<div class="separator" style="clear: both; text-align: center;">
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<span style="font-family: "arial" , "helvetica" , sans-serif;">I was really overwhelmed by the number views (700) to my last blog post about my Wilbur rubber model, the repair was finished and I flew the plane last weekend. I covered the center section with ¼ mil Mylar with tissue over top; this kept the tissue tight in really
humid conditions.</span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;">After the Free Flight Nats was over I wanted to try control line flying again, last fall I was flying an electric powered control line that worked well after initial problems. This year it flew fine but I have been hesitant to try any stunting other than wingovers because it seems rather fragile. So last winter I had ordered a simple ½ A glow powered control line the Sig Dewey Bird. Construction went well but then I was hesitant to install blind nuts because of the challenge it has been for me in the past. This time it went worse in that I got epoxy inside of the threaded area and twisted off a bolt. I tried drilling out the bolt but my drill bit barely scratched the surface. I started asking questions to a free flight listserve group and I received a lot of good suggestions although most were what to do before I twisted the bolt off, like heating the epoxy or plugging the hole before the epoxy. At the local hardware store I bought a cobalt drill bit which did drill through the metal and I tapped it for 2-56. </span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;">Someone gave me a Cox Baby Bee .049 that would not turn over with a rather large wood propeller. I figured the propeller over heated the engine but in asking questions I found out that people run even larger propellers on reed valve Cox .049 engines in the Texaco event. When I took the engine apart the bottom of the piston that connects to the connecting rod looked like it exploded. From my stash of old engine parts I found another piston and pushed out the old one. After putting the engine back together it ran great after a short time, it will be used in the Dewey Bird. With my electric control line I added tip weight that I never put in, it really helped the tension on the line; for the Dewey Bird I used a nickel for tip weight. </span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;">A couple of weeks ago I helped a friend assemble some furniture, it went pretty well for me but I have to believe that having built model airplanes was a real help. I have lots of experience reading directions and diagrams with model airplanes. With so much purchased online being able to assemble anything can save a lot of money compared to paying someone to do it. I found this quote from Business Insider about “spatial reasoning ability” interesting:</span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;"><a href="https://www.blogger.com/%C2%A0https://www.businessinsider.com/spatial-ability-predicts-future-success-2013-7" target="_blank"> https://www.businessinsider.com/spatial-ability-predicts-future-success-2013-7</a></span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;"> “It's no surprise that high verbal and math SAT scores at a young age might predict future success, but when you add a test for spatial reasoning ability to the mix, you get an even better predictor of someone's future accomplishments, creativity, and innovative potential, a recent study found.” </span><br />
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<tr><td class="tr-caption" style="text-align: center;">G-12 Catapult Glider</td></tr>
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<span style="font-family: "arial" , "helvetica" , sans-serif;">This week I finished up building the G-12 catapult free flight glider which will be used in Dick Bertrand’s Free Flight Rescue Program. It went together really well as most parts are designed to lock together. In doing some hand launches with the glider it appeared to be really stable. Look for more to come about this glider. </span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;">Bill Kuhl </span><br />
<span style="font-family: "arial" , "helvetica" , sans-serif;"><a href="http://www.ideas-inpire.com/" target="_blank">http://www.ideas-inpire.com</a></span><br />
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<b>Related Links</b><br />
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<a href="http://scienceguyorg.blogspot.com/2017/11/adventures-in-electric-control-line.html" target="_blank">http://scienceguyorg.blogspot.com/2017/11/adventures-in-electric-control-line.html Electric U-control</a><br />
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<br />Scienceguyorghttp://www.blogger.com/profile/17457833204658259656noreply@blogger.com0tag:blogger.com,1999:blog-4897183486294807522.post-77238339715645112422018-08-24T08:09:00.001-07:002018-08-27T05:56:54.712-07:00Repairing Wilbur Wing Learning Experience<div class="separator" style="clear: both; text-align: center;">
<a href="https://1.bp.blogspot.com/-c2fvs0j71Ng/W4Ag-hbmAHI/AAAAAAAAVSY/CBBJDE7aycEzIdqmVUsrL8Bkl-nHOUQXQCLcBGAs/s1600/WilRochA.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="877" data-original-width="960" height="584" src="https://1.bp.blogspot.com/-c2fvs0j71Ng/W4Ag-hbmAHI/AAAAAAAAVSY/CBBJDE7aycEzIdqmVUsrL8Bkl-nHOUQXQCLcBGAs/s640/WilRochA.jpg" width="640" /></a></div>
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<span style="font-family: "arial" , "helvetica" , sans-serif;">In working with my contest free flight models I seem to have reinforced what I might have read about but did not act on become an issue. Let me explain, I have read that to build a competitive balsa free flight model wood selection is important, heavier wood is needed in places where strength is really important, while other parts of the model can utilize lighter wood. Hoping to build lighter models for short kit models I have order lighter density balsa for the balsa needed to finish the model.</span><br />
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<tr><td class="tr-caption" style="text-align: center;">Embryo Model Wrinkles from Too Light of Wood</td></tr>
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<span style="font-family: "arial" , "helvetica" , sans-serif;">My first big struggle with using too light of wood came when I used too light wood for the longerons in the fuselage of an embryo model. After breaking the fuselage during construction, I could not get the model covered without sags and wrinkles either. More recently I had the wing fold in my Wilbur old time rubber model just after launch. In asking online what normally causes this, everyone told me using too light of balsa for wing spars. The structure for the wing is minimal on this model so I can see the importance of adequate strength in the spars. </span><br />
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<tr><td class="tr-caption" style="text-align: center;">Wing Folded</td></tr>
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<tr><td class="tr-caption" style="text-align: center;">Inspecting the Damage</td></tr>
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<tr><td class="tr-caption" style="text-align: center;">Replacement Spars</td></tr>
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<span style="font-family: "arial" , "helvetica" , sans-serif;">To find heavier wood, I purchased several strips from local hobby shop. I weighed the strips and used an online balsa density calculator. This wood was really heavy. The lighter of the 1/8” square strip was almost 13 pound balsa and other strips were over 20 pound per square inch, the lightest strip was used. </span><br />
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<tr><td style="text-align: center;"><a href="https://1.bp.blogspot.com/-hlcoRq2SZsg/W4AeJUaDh_I/AAAAAAAAVRw/ihux6dqXATcHucZiUOpNpi51DCYQGmDawCLcBGAs/s1600/22gramspar..JPG" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" data-original-height="667" data-original-width="674" height="395" src="https://1.bp.blogspot.com/-hlcoRq2SZsg/W4AeJUaDh_I/AAAAAAAAVRw/ihux6dqXATcHucZiUOpNpi51DCYQGmDawCLcBGAs/s400/22gramspar..JPG" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Really Heavy Wood</td></tr>
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<tr><td class="tr-caption" style="text-align: center;">Not as Heavy</td></tr>
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<span style="font-family: "arial" , "helvetica" , sans-serif;">In doing the repair instead of splicing pieces I removed all the covering from the center section and replaced the two spars all the way to the wing panels. Using acetone on the Duco glue joints the broken spars were easily removed. My experience has been that when I splice balsa with another piece doubling it most likely there will be a break in the balsa right next to where the balsa has been doubled. Maybe on a larger piece splicing at an angle would work satisfactorily. I am also repairing a Witch Hawk 500 wing and went a fair distance back from the breaks in replacing with new spars.</span><br />
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<tr><td class="tr-caption" style="text-align: center;">Replaced Spars</td></tr>
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<tr><td style="text-align: center;"><a href="https://4.bp.blogspot.com/-klcoIiKIZs0/W4Ae4wviUBI/AAAAAAAAVSM/bBspK517ZjAxv9RfaKFhsKjoxyHVph_zwCLcBGAs/s1600/mylarcenter.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" data-original-height="780" data-original-width="1600" height="193" src="https://4.bp.blogspot.com/-klcoIiKIZs0/W4Ae4wviUBI/AAAAAAAAVSM/bBspK517ZjAxv9RfaKFhsKjoxyHVph_zwCLcBGAs/s400/mylarcenter.jpg" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">1/4 mil Mylar Before Tissue</td></tr>
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<span style="font-family: "arial" , "helvetica" , sans-serif;">With tissue covering there is also the issue of the covering sagging in times of higher moisture like early morning flying. No doubt the model takes on more weight and the tension tight tissue gives the model structure is less. To help combat this problem in the center I am covering the center with ¼ mil mylar and then covering with tissue over that.</span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;"><b>Update 8-25-2018</b></span><br />
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<a href="https://1.bp.blogspot.com/-NMt6BGHa3AM/W4P0yW3agcI/AAAAAAAAVS4/gJSQPKkUrEQPH5uFchL8swjbYEkSPTtKQCLcBGAs/s1600/CoveredCenter.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="859" data-original-width="1600" height="213" src="https://1.bp.blogspot.com/-NMt6BGHa3AM/W4P0yW3agcI/AAAAAAAAVS4/gJSQPKkUrEQPH5uFchL8swjbYEkSPTtKQCLcBGAs/s400/CoveredCenter.jpg" width="400" /></a></div>
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<span style="font-family: "arial" , "helvetica" , sans-serif;">I finished up covering the center section mylar and tissue then made some flights in really humid conditions. The center section remained tight, tip sections and stab sagged. Someone mentioned the tissue is still taking on water weight.</span><br />
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<a href="https://2.bp.blogspot.com/-zkNGhafbgAM/W4P06a5lfJI/AAAAAAAAVS8/Zis4CjhzE44M0HaX0RN6L3lwneZyfs3SACLcBGAs/s1600/FlyFog.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1100" data-original-width="1600" height="273" src="https://2.bp.blogspot.com/-zkNGhafbgAM/W4P06a5lfJI/AAAAAAAAVS8/Zis4CjhzE44M0HaX0RN6L3lwneZyfs3SACLcBGAs/s400/FlyFog.jpg" width="400" /></a></div>
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<span style="font-family: "arial" , "helvetica" , sans-serif;">Bill Kuhl</span><br />
<span style="font-family: "arial" , "helvetica" , sans-serif;"><a href="http://www.ideas-inspire.com/">http://www.ideas-inspire.com</a></span><br />
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<b>Balsa Density Calculator Link</b><br />
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<a href="http://www.nclra.org/Programs/BalsaDensity.php">http://www.nclra.org/Programs/BalsaDensity.php</a><br />
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Flight Video<br />
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<iframe width="560" height="315" src="https://www.youtube.com/embed/TJ5xZOp76FM" frameborder="0" allow="autoplay; encrypted-media" allowfullscreen></iframe>
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Scienceguyorghttp://www.blogger.com/profile/17457833204658259656noreply@blogger.com0tag:blogger.com,1999:blog-4897183486294807522.post-17168041264273509732018-08-14T08:43:00.001-07:002018-08-14T08:43:38.046-07:00MMAC Contest & Model Trim<span style="font-family: Arial, Helvetica, sans-serif;">Why do some planes fly pretty consistent day after day while others seem to vary? I thought using a covering that changes a great deal with humidity was the major part of it but it seems there is more to it than that. I have to believe the aerodynamics of some planes results in a plane that has greater stability and the plane is a little more tolerant in slight variations in the trim. I know wood changes with weather conditions and I would assume plastic does to a smaller extent. Many years ago when I first started flying radio control glow planes I remember people warning about the plastic pushrods and how they would change with temperature. The speed of the aircraft multiplies the trim issues. </span><br />
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<tr><td class="tr-caption" style="text-align: center;">Streak Landed on Sandy Road</td></tr>
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<span style="font-family: Arial, Helvetica, sans-serif;">As I build new planes I go to the extra effort to build in screw adjustments for rudder and stabilizer. I find that I am making small adjustments on different days; it is not just get one trim adjustment and leave it forever. Sometimes it seems the trim changes throughout the day. </span><br />
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<span style="font-family: Arial, Helvetica, sans-serif;">My goal with my competition free flight models has been just to get consistent flights so I can get as much experience as possible without breaking it. After three years I am starting to think more about the performance. Recently I have been working with ½ A Streak glow model. Throughout the first several flying sessions I worked getting a consistent climb and transition. Some of the short first flights were rather nerve racking, on a couple of occasions the plane did a loop after launch, one time it pulled out just as it hit the ground.</span><br />
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<tr><td class="tr-caption" style="text-align: center;">Dave B at North Branch</td></tr>
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<span style="font-family: Arial, Helvetica, sans-serif;">With a washin wedge on inside right panel and tiny amount of right rudder some of the time, the power pattern is good and the plane transitions well. The issue now is it comes down too darn fast, at first I thought I was just launching into bad air but that cannot be the case on every flight. My theory now is the plane is just too heavy; it weighs 6 ounces while other people have built the plane to slightly less than 5 ounces. My Basic Yeller Pee Wee 30 model which has slightly less wing area weighs much less than 4 ounces; a big difference. </span><br />
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<tr><td class="tr-caption" style="text-align: center;">Wilbur Folded Wing</td></tr>
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<span style="font-family: Arial, Helvetica, sans-serif;">At the last contest I attended near North Branch Minnesota on my second official flight of my Wilbur rubber model the wing folded right after launch. Between the test flight, the first official flight I had added a larger number of turns to the rubber but less than I have used in the past. The wing structure is minimal so I will try to strengthen it without adding too much weight. Even with a big boxy fuselage this model glides pretty well.</span><br />
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<tr><td class="tr-caption" style="text-align: center;">More Dramatic Wing Folding</td></tr>
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<span style="font-family: Arial, Helvetica, sans-serif;">Flew discus launch glider and catapult in the contest as well, with the discus I was getting good altitude compare to others but just couldn’t seem to get the glider in a thermal it could stay with. My catapult glider that I struggled with and broke so many times is now flying consistent.</span><br />
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<span style="font-family: Arial, Helvetica, sans-serif;">For a small contest there were several people flying towline glider, as it had gotten windy I did not attempt to fly my Jetstream towline. If you had a good flight there was a good chance it could land in a tree.</span><br />
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<span style="font-family: Arial, Helvetica, sans-serif;">Bill Kuhl</span></div>
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Scienceguyorghttp://www.blogger.com/profile/17457833204658259656noreply@blogger.com0tag:blogger.com,1999:blog-4897183486294807522.post-74829716632837904932018-08-08T06:33:00.002-07:002018-08-08T06:38:01.639-07:00Nats Concluded - Finally a Winner<div class="separator" style="clear: both; text-align: center;">
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<span style="font-family: "arial" , "helvetica" , sans-serif;">At least one person remarked I packed a lot of airplanes in my small car; I flew most of them but not all in competition. My Jetstream towline glider I never took out of the car. I flew my Wilbur rubber model just for fun but ran out of time to fly it Friday in competition. Friday I had too many events; P30 rubber, PeeWee 30 gas, hi-start glider, classic towline and OT Stick rubber. The last two I never flew, there was about an hour left Friday afternoon and that is not enough time if you are walking. Tuesday evening I ran the E20 event for Bob Stalick but did not fly. Taking pictures, video, and recording scores kept me plenty busy. I had created a scoring spreadsheet for my tablet which worked fine but it is hard to see a screen in sunlight.</span><br />
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<tr><td class="tr-caption" style="text-align: center;">Basic Yeller Pee Wee 30</td></tr>
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<tr><td class="tr-caption" style="text-align: center;">E20 Event Tuesday Evening</td></tr>
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<span style="font-family: "arial" , "helvetica" , sans-serif;">Friday morning started with very little wind, I wanted to fly my Polecat X p30 model first because it uses a long 3/32” rubber motor that runs a long time but climbs slowly, good for calm conditions. I had test flown it the day before and a strand of rubber broke, so I replaced the motor. The first contest flight I wound to 1200 turns and the plane barely flew. I tried winding to 1550 turns and the motor broke every strand in the rear. To speed up things I tried tying the strands together, it broke in front this time. New motor from same batch of rubber I carefully wound to 1500 turns.</span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;">I launch the model and it was stalling like crazy and came down, one attempt. In my stress to get in another flight I put a shim on the rear of the stab instead of the front. It stalls even worse, another attempt. Fix the shim and wind the motor to 1500 turns and the plane is flying better but bouncing around in the wind that is increasing. My last flight took it across the field almost to the camp ground but the duration was short of a max. It just seems to me the previous batch of rubber I used in the plane worked better.</span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;">On to my next event PeeWee 30, my Basic Yeller has had many flights just for fun but never flown in competition. The first launch it had a little too much right and not enough rpm and hit the ground breaking the pylon. I glued that up and flew two hand launched flights that were around a minute long. For the last flight I had the motor adjusted better which it needed because the last flight was the ROG flight. I was afraid it might hit a tree going into the wind but it turned back and provided another long walk down the field. There were 6 people signed up for the event and only 3 flew. I won my first trophy at the Nats and it was for first place. Having my name called in award ceremony for the first time in three years was nice.</span><br />
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<tr><td class="tr-caption" style="text-align: center;">Models Brought to Nats</td></tr>
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<span style="font-family: "arial" , "helvetica" , sans-serif;">The last event I flew was not an official event but fun just the same, hi-start glider. One evening I had flown the Retro Gnome glider I had built a couple of years ago using 1/16” rubber on the hi-start instead of 1/8” rubber which is really too much. With the thinner rubber the glider appears to adjust the flight path to straight better than when it launches too fast. Flying in the contest it was gusty but my glider launched without crashing every time. The last flight I think I stretched the rubber a little too much and the glider had a little trouble releasing. One flight resulted in a rather long chase but duration was not great in any of the flights. I was just happy how well it launches.</span><br />
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<tr><td class="tr-caption" style="text-align: center;">2018 Sympo</td></tr>
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<span style="font-family: "arial" , "helvetica" , sans-serif;">This concludes comments on my trip to the 2018 Free Flight Nats, it sure was a great time that went too fast. I really would have liked to have been more social but it was great getting so much flying in. The 2018 NFFS Sympo was for sale at the Nats, I have two articles in this issue. One is on recruiting kids to free flight and the other is on viscous DT timers.</span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;">Bill Kuhl</span><br />
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Scienceguyorghttp://www.blogger.com/profile/17457833204658259656noreply@blogger.com0tag:blogger.com,1999:blog-4897183486294807522.post-37678487361421015592018-08-06T12:19:00.001-07:002018-08-06T12:36:51.581-07:00Nats 2018 Adventures II<span style="font-family: "arial" , "helvetica" , sans-serif;">Monday morning early there was barely any wind and I thought I could no longer put off flying the Witch Hawk 500 I had built, having completed it not long before the Nats. This was my first larger glow powered free flight with 60” wingspan powered by an old K&B .19 Greenhead. I was really nervous to fly the model but then I didn’t build it to hang from ceiling. This was the first time using bladder pressure and using an electric starter strapped to a stand. If there wasn’t so much equipment needed I would have flown it far from the flightline. </span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;">First short flight it climbs completely straight and stalls. The wing pops off but only damage was a broken propeller. Adjusted the rudder a tiny amount to the right, next flight it climbs slightly right and transitions great. With no wind to drift it the glide circle was going right over the cars and people. I was so afraid it would hit a car but instead it hit a golf cart breaking the wing in half, worse than that it broke the Texas Timers Max IIIa timer. I have the wing almost repaired except for covering.</span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;">Wednesday was the E36 event and I flew the first e36 I built the Super Pearl e202 which is still flying well. Except on the first launch I did not have the stab adjustment screw on the platform, the plane went up rather flat and the glide was a dive, luckily no damage. My next two official flights were okay but short of a max. On the last flight the Pearl makes a huge circle around the edges of the field, I lost sight of where it landed but I had my tracker. This was my chance to use the tracker; I get a rather strong signal from the area by the two metal buildings across the field. </span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;">As I walk by the buildings I see at least two models but not mine. A guy cutting grass tells me there is a model in the next field beyond the buildings. I walk over there and these were high-tech FAI models, so I walk back towards the camp grounds. By now I am really doubting by ability to use the tracker; Dave Sechrist drives by on his little Honda motorcycle. He thought it could be by campground but drove in that direction and found nothing. It has to be towards the buildings and in a short jaunt on his cycle he found my plane real close to a building. He offered a ride back on the rack of his motorcycle and I accepted. Later I checked my smartphone as to how far I walked that day and it was a little over 14 miles. At least the flight was a max but my only one. What rather shocked me was looking at the results how even experts had poor flights that day.</span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;">Not just sure what I flew after that, I think it was catapult glider. I was really tempted to skip the event but thought at least I would try. Still using the catapult glider that I had so much trouble getting to transition early in the 2018 season but it is still flying. I was actually happy the flights were rather short because I did not want to walk too far. As I ended a gentleman gave me some advice on launching which helped, the guy was Ralph Ray.</span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;">I stayed out to the field rather late as that was the NFFS banquet night. Really a great meal and program afterwards, I really like the funny speech Bob Hanford gives, and great choices for the Hall of Fame members. Think I need at least one more blog post to cover my Nats adventure.</span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;">Bill Kuhl</span><br />
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Scienceguyorghttp://www.blogger.com/profile/17457833204658259656noreply@blogger.com0tag:blogger.com,1999:blog-4897183486294807522.post-83818235676797594492018-08-01T11:23:00.000-07:002018-08-01T11:23:12.727-07:00It Flew Great Back Home – Nats 2018<span style="font-family: "arial" , "helvetica" , sans-serif;">Last week was my third Free Flight Nats contest in Muncie Indiana; for the most part weather was good, I learned a great deal, and had a fantastic time. I came home with all the planes I brought but some repairs are needed on a couple of the planes. On arriving late Saturday afternoon in rainy weather, I still went out to the field and flew my Super Pearl e36 between rain showers, there was one other plane flying. Sunday is the day many people use for testing before the start of the contest on Monday; I spent the morning flying non-stop and did more observing in the afternoon as the wind increased. My ½ A Streak for One-Design had been flown on small field back home but only the last time out did I feel it was close to trimmed. The flights on Sunday morning looked good, with no sign of trying to loop as it had back home. </span><br />
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<tr><td class="tr-caption" style="text-align: center;">Saturday Evening Flying</td></tr>
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<span style="font-family: "arial" , "helvetica" , sans-serif;">In the afternoon I flew my Blue Ridge Special with DT a few times just for fun. The last flight it went a little further and I had a heck of time finding it in the grass. Thought I had a good line on it and so did someone else but it seems that the smaller models such as e20 or this model with 14” wingspan disappear easily in the longer grass. Luckily someone on a motorcycle found it for me; I put it away after that.</span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;">The rest of the day I was observing Bob fly his e36 Satellite and Craig fly his Big Dog electric. Bob had a very nice looking e36 Satellite that was giving him fits to adjust but had flown well back home. I took video of the second short test flight and the model rolled inverted and crashed, damage was extensive.</span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;">Craig had this well-built larger electric model that just didn’t want to transition properly, it starts on a nice right climb, then straightens out which cause it to stall after the motor cut. At this point it would either dive or do a tail slide. Larry, Bob, and Jim, a combination of many years of free flight experience had Craig try all sorts of adjustments to thrust, rudder, etc. and it was not helping. After an adjustment had been put in it would be taken out and another adjustment tried. It did get better and I understand it did get sorted before contest flying but was destroyed after hitting something on the field.</span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;">I flew my Eureka e36 many times but was noticing the trim change also. The wing mount appeared to be loose but after fixing it the issue appeared again. After making one official flight, it spiraled in to the right and broke the fuselage. Not an extensive repair needed but I am going to recover the wing with Polyspan Lite. I would have done this before but was running out of time before the contest. With no diagonal structure in the wing, I can image there can be flexing going on when tissue gets loose. I remember last year after a crash from a bad launch of my E36 Starduster the repaired wing would do funny things as the motor run was increased. The ½ A Streak I covered with Polyspan Lite appeared to stay in trim well. It is not much more work, just that multiple coats of color and dope are needed.</span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;"> Just for fun I flew my Flying Aces Moth and it worked well but went back to old habit of crashing to the right, more fuselage repair is needed.</span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;"> Paul had a really squirrely flight with a very well built embryo model, it had flown great the day before. We have been discussing ideas of what differences were between the flying on two different days.</span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;">In conclusion, free flight can be even more challenging than I had thought. I learned much but also realize there is way more I do not know. With the air conditions a big part of flight duration, even the experts have bad flights on occasion. </span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;">Bill Kuhl</span></div>
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Scienceguyorghttp://www.blogger.com/profile/17457833204658259656noreply@blogger.com0