Friday, April 12, 2013

Content Manager - Indian Water Rocket Forum

Update 1-12-2015 - Over 500 Members

Recently there has been a huge upsurge to the membership taking it well over 500 members.

Thank you!


No I have not moved to India yet but I have been given the ability to add content to Indian Water Rocket Forum. This is really an honor for me that I am trusted to add good content, which I will try to do. My experience with the water rockets has been more for holding kid events in the United States. There are however many people that enjoy water rockets at all levels in all parts of the world.


Bill Kuhl
http://www.ideas-inspire.com


Well Over 500 Members!

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Thursday, April 11, 2013

Kidwind MN Renewable Energy Challenge


This Saturday April 13, 2013 is the Kidwind Minnesota Renewable Energy Challenge at the School of Environmental Studies.  I was a judge for this last year but will have to miss it this year.  This is a competition for kids to build model wind turbines and have them tested in a wind tunnel to measure the electrical output.  There is much more to the competition than that such as the teams having to give presentations, and being interviewed about their wind turbine design.  High Tech Kids holds this competition in the spring and LEGO robotics during the winter months.

MN Renewable Energy Challenge 2012

Typical Competition Wind Turbines

On my website there is an article on how to build a modelwind turbine using wood and cardboard for the blades. An inexpensive dc motor is used for the generator portion of the wind turbine.  I have helped with this activity for Fuel My Brain classes and as part of College for Kids classes I taught.  The students really get competitive with trying to get the highest voltage reading from their model wind turbines. Adjustments can be made to the angle of the blades and the length of the blades that are factors in the output voltage.
Fuel My Brain Class
College for Kids Class
 
Website Construction Project

 
Bill Kuhl
http://www.scienceguy.org



 

Wednesday, April 10, 2013

Trout Fishing

Another one of my favorite activities is fishing for trout in small streams. I have been successful at this for probably the last 15 years, before that I would drown a worm in one spot. Maybe every couple of times out I would catch a fish.  Then I watched a video about fishing with spinners and how you had to be constantly be moving.  My catch rate increased considerably when I tried a new approach.

Typical Brown Trout

Rainbow Trout Must be Planted in Area Streams

Looking at the scenery in the pictures I post makes it look like such a perfect activity. What the pictures do not show is me tripping over branches hidden in tall weeds, falling into cold water when not sure of the edge of the bank, getting snagged in the trees, and trying to wade through a bottom that is like quick sand. Walking with hip boots full of cold water isn't much fun either. At least I have only touched an electric fence once, a truly shocking experience. I have never had a bull chase me either because I do not even like to be in with the cows.





Trout fishing is one activity I tend to not want to share everything I know. Not that I am a great fisherman but I do fairly well. I like to eat trout as well but only catch what I will eat in a meal and release some of the fish. The season starts the end of this week and there was a dusting of snow this morning, it might be a late start for me this season.




Bill Kuhl
http://www.scienceguy.org

Tuesday, April 9, 2013

My Acting Career - ha ha


A few years ago I was persuaded to be an actor in the local Cemetery Walk.  I can say with certainty that I have no prior acting experience except maybe in elementary school so it was a rather brave thing to try.  Memorizing lines sure did not come easy for me, but other people seemed to have just as much trouble. The first year I even tried rehearsing into a tape recorder and playing it back.  Getting everything to absolutely match the script isn’t critical but too much adlibbing makes it tough for the other actors.  Remembering the cues from the other actor’s lines can be tougher than remembering your own lines.

 




 

The skits we did lasted no more than 5 minutes but on a weekend day you might have to perform this over twenty times.  This was in the fall of the year and it could be cold at times, it was also a very pretty time of year with the changing color of the leaves.  Some of the performances were in the morning for area school children and the weekend performances were for the general public.  It was the biggest money making activity for our local history center.


I see from the pictures that I had done these four years as I appear in four different costumes. The first year I was an undertaker, then a railroad engineer, not sure about the third year.  Last year I was a fire chief in the great “egg scandal” in our city, a mayoral candidate bought votes by selling eggs for cheap.


I think I did alright although I am sure not a natural actor, it has to be good to get up and speak in front of people.  Most people myself included would mess up once or twice and then do fine.  It was almost like you had to get the mistake out of the way and then the stress eased up.  A few weeks later you can not remember any of the lines and the next year you forget the character you played.
2013 I Play an Ice Cutter (2nd from Left)

 Bill Kuhl
 

Slope Soaring Trips

For a couple of years I joined a group of model sailplane enthusists for several days of slope soaring in South Dakota. This was possible by a connection we had with someone in South Dakota getting permission to fly from private land. Much of the land overlooked the Missouri River and the bluffs were more rolling and not so tree covered as in the city I live in along the Mississippi River. Everyone would stay in the same hotel, eat together, and fly model sailplanes for 10 hours a day. I made this trip several times and was lucky the weather was normally good. The guys going on the first trip this year might not be so lucky as a blizzard is forecast.

 



 
Slope soaring is where the wind facing a hill is deflected upwards giving the model sailplanes constant lift as long as the wind was blowing. The strength of the lift did vary so often you were seeking out the spots on the hill with the best lift to fly over. Most of the time the lift was rather strong and gliders that were way too inefficient for thermal flying could stay aloft over the slope. One day we were flying in 50 mph wind which I took a short video of.







Many of the gliders were made of a foam that could absorb the shock of bad landings or even crashing into each other in the air, which is great fun. Other planes were of composite construction and designed more for high performance. Some of the guys were really creative in the gliders they designed such as the giant C5 glider pictured or a radio controlled bald eagle.


                                                            Video of 50+ m.p.h. Wind

My Article on Slopeflyer.com from 2002


Bill Kuhl
http://www.scienceguy.org


Monday, April 8, 2013

Flying Windup Airplanes Yesterday

By far my most popular blog post has been "Why I Still Fly Windup Model Airplanes". Yesterday I had a chance to do exactly that although I did fly one radio control airplane.  Maybe part of why I like to fly the free flights airplanes is because it is easier to take pictures of the planes flying when you are flying alone.  I have taken some pictures of my radio control planes while flying the plane and that is a real trick, the plane must be stable and slow.

Uncle Sam Shortly After Launch
Denny Dart II


Uncle Sam Coming in for Landing

 

The wind was gusty yesterday but I was still able to have fun flying the simple rubber powered airplanes. Part of why I like to fly these types of planes is there is not much risk if the plane crashes or flies away. The scale-type planes I normally only fly in near calm conditions normally in the evening or morning before thermal air currents are likely.  Launching a simple plane into thermal air current is really kind of a thrill to see it go higher and farther than normally possible. Sometimes it flies out of sight. Competition free flight airplanes use a "dethermalizer" to bring the plane down after a set time, this is something I want to experiment with this flying season.

Peck ROG Flew Well in the Wind 
New Foam & Straw Plane Climbing Well

Bill Kuhl
http://www.scienceguy.org

Friday, April 5, 2013

Teaching at Wisconsin Afterschool Conference


In a couple of weeks I will be teaching a class for the Wisconsin Afterschool Conference in Madison Wisconsin. This will be my second time teaching for the conference and this time it will be the project from my latest website article Foam Plate and Straw Gliders.  I think this should be an ideal afterschool activity because it is so inexpensive, doesn’t require special tools, and should be relatively safe. 
 




In addition to teaching the building and flying of the gliders I hope to demonstrate how a rather simple concept can be taken many directions.  For me the idea of foam gliders started at a slightly more complicated level with the Foam Jet II and then I tried to simplify the idea with additional glider designs. The HammerDown Catapult Glider was based on using a foam meat tray in the wing which eliminated joining so many foam sections together as was the case with the Foam Jet II.  Yet I wanted to build another foam glider that required less preparation and did not require a hot glue gun to assemble the pieces.
Foam Jet II Glider
 
Building Hammer Down Catapult Glider
Even with the idea of the foam plate and straw gliders I will take this another direction Thanks to a suggestion by Slater Harrison aka The ScienceToyMaker.  He suggested the planes would be more popular if they were powered by a rubber motor turning a propeller.  I took one of the glider planes and added the rubber power and it worked better than I imagined. It is my plan for the class to first build a glider and then convert it to rubber power.
Bill Kuhl