Rubber Powered
How to make a 2 axle, 4 wheel rubber band powered car?
For my science class, I have to make a rubber band powered car with 2 rubber band, 2 axles, and 4 wheels. I have an idea already, I just need ideas for how to tie the rubber band around the 2 axles.
Here's what I did back in engineering class in high school:
My car was technically rubber band powered, but the rubber band was not on the car. I built a separate catapult for it (which was like a T, the car straddled the long part of the T, with the shorter part being a backstop. I stretched the rubber band from the front of the launcher to the car, then had a release to send the car. It was technically powered by a rubber band, but had much more speed than you could probably get by simply having the car. ours had to go as close to 10M as possible (but under 11M), so what you do for that is get enough string and wind from axle to axle, so that it runs out right at the desired distance and stops the car.
I used 2 CDs for each wheel, and put a rubber band around each wheel for traction for it to stop. If your car doesn't have to stop though, only use one CD and no rubber band, since you would want less friction.
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