Zheng3 Penny Catapult (Q88558)

*** **Oye! Oye!** [Brenda the articulated battle tardigrade](http://bit.ly/1W8W1Ag) has been released into the wilds of 3D printing! [Join the Horde](http://horde.zheng3.com) to be among the first humanoids to learn about the next epic project from Zheng Labs! *We now return you to your regular model description.* *** 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 bands. Penny not included! ***