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Anair vortex cannon is a toy that releasesdoughnut-shaped air vortices — similar tosmoke rings but larger, stronger and invisible. The vortices can ruffle hair, disturb papers or blow out candles after travelling several metres.
An air vortex cannon can be made easily at home,[1][2] from just a cardboard box.[3]
Air cannons are used in someamusement parks such asUniversal Studios to spook or surprise visitors.[citation needed]
TheWham-O Air Blaster toy introduced in 1965 could blow out a candle at 25 feet (7.6 m).[4][5] The commercial Airzooka was developed byBrian S. Jordan who claims to have conceived it when still a boy. A feature of the Airzooka is a loose non-elastic polythene membrane, tensioned by abungee cord, rather than elastic membranes. This allows a much greater volume of air to be displaced.[citation needed]
A large air vortex cannon, with a 9 feet (2.7 m) wide barrel and a displacement volume of 2,873 US gallons (10.88 m3) was built in March 2008 at theUniversity of Minnesota, and could blow out candles at 180 feet (55 m).[6][7]
In 2012, a large air vortex cannon was built forCzech Television programZázraky přírody (lit. 'Wonders of Nature'). It was capable of bringing down a wall of cardboard boxes from 100 metres (330 ft) in what was claimed to be a world record.[8]
