Potato Cannon

A simple potato cannon, 40mm X 1000mm barrel, 50mm X 500mm combustion tank and a BBQ igniter on a 50mm threaded plug. To shoot all you need is hair spray and a potato, spray 3 short bursts of hair spray in the back, screw the end on and click the igniter. If you get the prefect fuel-air mixture it can shoot about 80m