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Non-circular Gear

by stellarinnovation Aug 11, 2019
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So clever! I thought for sure that tiny circular gear would never work, and then I noticed it was off-centre when I played the video. Bravo!

I agree. It doesn't look right. That's what makes them fun!

The curve of the small, round one is exactly a quarter of the length of the bigger "square" gear. When they roll without slipping the sum of their radii is constant (=the distance between the axles). That's the "secret". But it doesn't look like it should work. Haha.