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An air vortex cannon is a toy that releases doughnut-shaped air vortices — similar to smoke rings but larger, stronger and invisible. The vortices can ruffle hair, disturb papers or blow out candles after travelling several metres.
Vortex cannon may refer to: Vortex cannon, a mythical anti-aircraft weapon; Air vortex cannon, a toy producing doughnut-shaped air vortices; See also.
Knock-down test of a 109 mph (175 km/h; 49 m/s) vortex ring gun. The vortex ring gun is an experimental non-lethal weapon for crowd control that uses high-energy vortex rings of gas to knock down people or spray them with marking ink or other chemicals. The concept was explored by the US Army starting in 1998, and by some commercial firms.
Vortex gun may refer to: Vortex ring gun , an experimental non-lethal weapon that uses high-energy vortex rings of gas Air vortex cannon , a toy that releases doughnut-shaped air vortices
Air cannon may refer to: Air blaster, a de-clogging device with a pressure vessel and triggering mechanism; Air cannon (mechanics), a device used for marine reflection and refraction surveys; Air vortex cannon, a toy gun that fires air vortex rings; Vortex ring gun, a non-lethal weapon that fires gas vortex rings
A vortex ring, also called a toroidal vortex, is a torus-shaped vortex in a fluid; that is, a region where the fluid mostly spins around an imaginary axis line that forms a closed loop. The dominant flow in a vortex ring is said to be toroidal , more precisely poloidal .
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Mario Zippermayr was born in Milan, northern Italy, to Austrian parents.He studied in Freiburg and Karlsruhe.In 1927 he earned his doctorate in engineering and in 1938 his habilitation in physics.