How to Construct Rubber Band Cars
A rubber band car is a simple toy that takes advantage of the stored energy in a wound rubber band to propel the car. As the rubber band unwinds, it turns the rear axle of the car. This, in turn, drives the rear tires that move the car. Construction is relatively simple and all of the parts for a rubber band car can be bought at a craft store. This is a good project to teach kids about physics and to make a toy that doesn't require a battery to work.
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Things You'll Need
- 2 strips of basswood 1/4" x 1" x 10"
- 1 medium rubber band
- 2 plastic wheel sets with metal axle
- 1 block basswood 2" x 1/2" x 6"
- Drill with 1/8" bit
- 1 small brad
- Small hammer
- White glue
- Masking tape
Instructions
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1
Drive the brad into one end of the basswood block. This will be at the front of the car, once assembled.
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2
Align the two strips of basswood and drill a hole through the one-inch side of the strips at each end.
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3
Separate the strips. Apply glue to the 1/2" sides of the basswood block and glue the strips to it, allowing equal the ends of the strips to extend equally beyond the ends of the block. Allow the glue to dry completely.
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4
Insert the metal axles through the holes in the basswood strips. Place the wheels on the axles. Wrap several turns of masking tape around the back axle.
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5
Flip a loop of the rubber band around the back axle and slip the rest of the rubber band through the loop. Pull the rubber band to tighten the loop around masking tape on the axle.
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6
Stretch the rubber band and hook it onto the brad on the other end of the basswood block.
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7
Turn the back wheels to tighten the rubber band. While holding the back wheels and the car, place the car on a flat surface and let go. The rubber band will unwind and drive the axle, which will make the car go.
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