Pinewood Derby Q&A

gravity_go_back.jpg

Summary: the gear is made from a narrow strip of double-sided tape wound around the axle until the right diameter (gearing) was achieved through trial and error doing test runs down a track. The gear is glued on it's sides to the axle with PL Premium The diameter of the gear is crucial to performance: too small and gearing will be too tall and acceleration off the

Image Dimensions: 600 x 640