Zheng3 Penny Catapult

http://www.zheng3.com/2012/05/15/the-penny-catapult/ Here's a basic torsion catapult. It uses one or more elastic bands to launch a U.S. penny if you print it at 1:1 scale. You probably won't get enough torque to be impressive with fewer than 3 ba...

Tags: 3d catapult makerbot seej zheng3

Link: http://www.thingiverse.com/thing:23051

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