When the leather diaphragm is pulled back and pushed into the cannon, the air is compressed and forced out the small opening at the other end. The 'bundle' of high pressure moves through the surrounding air like a puff of wind, moving the banner.
Non-powered Interactive.
COPYRIGHT 2017 SCIENCE ALIVE EXHIBITS | PO BOX 40 020 CHRISTCHURCH NEW ZEALAND | P 64 3 365 5199