I have a project that I'm working on involving a rubber band powered vehicle. I have a pretty well developed design involving several methods of propulsion but my main concern is a trigger mechanism in which to release this source of power from the rubber bands. Im not sure whether to go along the lines similiar to a mouse trap or a different route. The trigger has to be triggered by a small canister that is dropped from a programmed robotic arm and engage the trigger mechanism, so virtually the whole process has to be hands free. Any help or different perspectives on this topic would be greatly appreciated.