Semicircular was actually the word I was going for, thank you. I just can't figure out how to make the car make the appropriate turns at the appropriate times, seeing as "no team member may interact with the vehicle at any time".
For class, a partner and myself must build a mousetrap vehicle which travels down a runway (120 inches), executes a 180 degree turn around an obstacle(72 inch maximum width) and travels back past the finish line. http://www.geneng.mtu.edu/olympics/2010/mousecar_competition_b2010.pdf click here...