The Iso-Planer: Catapult Competition 2011

Back in the Spring 2011 I entered a catapult design competition held between the major community colleges. It was fifty points of extra credit and a chance to have some real freedom as a student and designer so I jumped at the opportunity. The main rules of the competition were that the catapult must fit into a 3x3x3 box, could not be powered by stored air pressure, could not use any type of winch to build up power in a spring, and must be triggered with a pull string of some kind. Here is my process from concept drawings to execution.