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. Knockdown of distant individuals currently seems unlikely even if the rings are launched at theoretical maximum speed, the speed of sound. As for the delivery of chemicals, leakage during flight is still a problem.
Weapons based on similar principles but different designs and purposes have been described before, typically using acetylene-air or hydrogen–oxygen explosions to create and propel the vortices.
Read more about Vortex Ring Gun: Operation
Famous quotes containing the words vortex, ring and/or gun:
“The Image is more than an idea. It is a vortex or cluster of fused ideas and is endowed with energy.”
—Ezra Pound (1885–1972)
“The world,—this shadow of the soul, or other me, lies wide around. Its attractions are the keys which unlock my thoughts and make me acquainted with myself. I run eagerly into this resounding tumult. I grasp the hands of those next to me, and take my place in the ring to suffer and to work, taught by an instinct, that so shall the dumb abyss be vocal with speech.”
—Ralph Waldo Emerson (1803–1882)
“I grew up in a tough neighborhood and we used to say ‘you can get further with a kind word and a gun than just a kind word.’”
—David Mamet, U.S. screenwriter, and Brian DePalma. Al Capone (Robert DeNiro)