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How do you make a Pinewood Derby car?

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No fancy shapes

But aerodynamics rule the day, and the best shape is a simple wedge. Just like a spoiler on the rear of a sports car, the wedge shape allows as much air to flow over the top of the car without hinderance while keeping the car pinned to the track. Our wedge tapers from 5/16-in. to 7/8-in.

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