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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.
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 cannon may refer to: Vortex cannon, a mythical anti-aircraft weapon; Air vortex cannon, a toy producing doughnut-shaped air vortices; See also
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
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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
Late in 2020 and early in 2021, AccuWeather meteorologists warned that a weakening of the polar vortex was coming and a major southward discharge of cold air would follow during the second half of ...
The polar vortex is a large area of low-pressure and cold air surrounding both of the Earth’s poles, according to the weather service. It always exists near the poles.