PVC air cannons are great, and everyone should build one of these at some point in their life, but what really makes this build exceptional is the valve. [Ben] created a piston valve for this ...

Charging the cannon is done via a Schrader valve, as you might find on a bike’s inner tube, and firing is achieved via a ball valve. Of course, if you build such an air cannon yourself ...

The Army is maturing technology for a cannon capable of firing hypervelocity projectiles for the air defense mission, according to the director of the service's Rapid Capabilities and Critical ...