Vortex gun blows smoke rings

April 5, 2012
Engineers at the Battelle Memorial Institute are patenting a special vortex gun they developed

Battelle Memorial Institute

To see the gun in action, go to http://tinyurl.com/8xu2npq

Engineers at the Battelle Memorial Institute are patenting a special vortex gun they developed. It might find use firing rings of ionized air at fires to clear smoke or sending rings of pesticide at hard-toreach wasp nests or other pests. And police might use it to disperse tear gas into a crowd without the danger of a canister hurting anyone or the risk of a miscreant hurling the canister back at the police.

The gun forces air or some other gas down its barrel at speeds of at least 90 mph. Friction of the gas against the inside of the barrel causes a thin layer of the gas to roll forward on itself, forming a ring. The developers liken the effect to a tornado formed into a donut. The ring revolves, letting it stay together rather than disperse. Tests show rings can stay together for at least 50 yards and travel at 60 mph. The vortex rings are even stable in crosswinds, but they tend to turn into the crosswind.

© 2012 Penton Media, Inc.

Sponsored Recommendations

The entire spectrum of drive technology

June 5, 2024
Read exciting stories about all aspects of maxon drive technology in our magazine.


May 15, 2024
Production equipment is expensive and needs to be protected against input abnormalities such as voltage, current, frequency, and phase to stay online and in operation for the ...

Solenoid Valve Mechanics: Understanding Force Balance Equations

May 13, 2024
When evaluating a solenoid valve for a particular application, it is important to ensure that the valve can both remain in state and transition between its de-energized and fully...

Solenoid Valve Basics: What They Are, What They Do, and How They Work

May 13, 2024
A solenoid valve is an electromechanical device used to control the flow of a liquid or gas. It is comprised of two features: a solenoid and a valve. The solenoid is an electric...

Voice your opinion!

To join the conversation, and become an exclusive member of Machine Design, create an account today!