I opened my big mouth

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Project by USCJeff posted 07-20-2015 04:29 AM 2807 views 8 times favorited 8 comments Add to Favorites Watch

I once again regret volunteering for things and then going overboard with execution. We have a Cub Scout Day Camp that will run the next three days. I work with the oldest boys, but offered to help with the Wolves as there was a lot of crafting and woodworking involved. Being the idiot I am, I went for much more elaborate than needed projects to meet the goals. Camp is always fun so I hope that makes it worth it.

The requirements I’m trying to meet deal with vehicles and physics. They are required to build a car that moves on it’s own power, two different boats, and several differently shaped paper airplanes.

I decided to show different ways they can power a car without the use of a motor or their touch. Balloons, Rubber bands, and Springs were the three that I can up with.

The spring car was poorly thought out. The spring is way too close to the axle that it is connected to by heavy thread. The car should have been much longer.

The candy box cars with balloon engines travel the furthest of all. The kits for the boys have different types of wheels. The wheels were pinewood derby wheels, plastic bottle caps, and CD’s.

The wheeled boat and rubber band cars are the same in theory. Both involve twisting a rubber band taut and releasing it.

The simple boat has a hole drilled through it to allow a 1/2 inch diameter plastic hose. Balloon on one end, the other is for blowing it up and putting it back underwater to power it.

The paper airplane launcher was simple. The planes are hole punched and fitted with paper clips to attach the plane to the runway.

-- Jeff, South Carolina

8 comments so far

View Hawaiilad's profile


3386 posts in 4481 days

#1 posted 07-20-2015 04:43 AM

Wow Jeff, you really have some great ideas for the boys. I so remember Cub Scouts…and that ways over 60 years ago. Never went on to Boy Scouts…I think girls took care of that, but often wish I had. Thanks for sharing.

-- Larry in Hawaii,

View Jim Jakosh's profile

Jim Jakosh

27706 posts in 4565 days

#2 posted 07-20-2015 11:25 AM

That is really a cool array of projects. Nothing like going a little further to show the kids something they would never get anywhere else. it will start their minds going too.

When my kids were in middle school they had to build and race mousetrap cars. There were some real cool designs using LP records for wheels to reduce friction and keep momentum. My kids had ones using big rat traps with the arm that swing over and they had CVT transmissions. It was just a cone on the axle that changed the ratio when the string ran out on it. Lots of fun. I miss that now they are grown up and the grand kids don’t do that in school any more.

cheers, Jim

-- Jim Jakosh.....Practical Wood Products...........Learn something new every day!! Variety is the Spice of Life!!

View helluvawreck's profile


32122 posts in 4327 days

#3 posted 07-20-2015 04:09 PM

Jeff, that’s a nice collection of projects.

helluvawreck aka Charles

-- helluvawreck aka Charles,

View InsideTheBox's profile


125 posts in 3134 days

#4 posted 07-20-2015 05:47 PM

That’s funny – seems like you learned a lot as well!! (ie, the spring didn’t work as well as the balloon, etc)
It’s all a learning experience and I bet they will remember what they got out of it, as well as what a fun time they had!

-- There's no such thing as a mistake; only a quick change of plans.

View USCJeff's profile


1065 posts in 5528 days

#5 posted 07-20-2015 06:17 PM

I did see a commercial mousetrap powered car kit recently. It had to work better than the 6” distance the spring car went. Traction was a big issue as well. Using rubber over the wheels helps.

-- Jeff, South Carolina

View nayo's profile


298 posts in 3353 days

#6 posted 07-20-2015 09:28 PM

nice, and nicer where those toys are going to be.
any videos of the car running?

View robscastle's profile


8555 posts in 3664 days

#7 posted 07-23-2015 09:36 PM

Big mouth…big heart ….will live long !!

Want something done ask somebody who is busy
An impressive result, and not missing the covert action in learning the laws of physics for them

-- Regards Rob

View Richard's profile


1959 posts in 4150 days

#8 posted 07-24-2015 09:16 PM

Very nice project’s for the kids .

Rule #1 – Engage Brain Before Opening Mouth. :)

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