The Air Cannon uses a vortex of air for ammunition. Its unique shape creates a stable toroidal vortex. Pull back the flexible membrane, release, and the invisible wave front of air can hit a target 20 feet away. Here is a great demonstration of the energy that can be stored in waves.
STEM Library Lab
http://www.stemlibrarylab.org
3011 N I-10 Service Rd Ehttp://www.stemlibrarylab.org
Metairie, LA, 70002
USA
504.517.3584