Penny Catapult

myminifactory

Human: http://www.zheng3.com/2012/05/15/the-penny-catapult/\r\nCreate a basic torsion catapult that launches a U.S. penny when printed at 1:1 scale using one or more elastic bands. You'll likely need three or more bands to generate enough torque for an impressive launch. The penny is not included in the design.