[dsalvucci]

To build on what Dom had posted on regards to the cannon. Team 23 had built a plywood bridge and then put 10 lbs on the opposite side of the bridge for testing so that we knew our air cannon design could push it down. We originally had belts driving the cannon up and down via window motor power, but quickly realized it was not strong enough and switched to a timing belt idea (black plastic belt with teeth on one side).

Opposed to the OP's title, however. Team 23 quickly recognized that the importance of the bridge was way more than shooting and focused largely on a design that could do everything asked. ie the cannon was a ball pickup, shooter, and bridge manipulator