Instead of using a ball valve or other such contrivance to dump air directly from a reservoir into the chamber of this PVC air cannon, [Ben] is using a much more clever design. This is a barrel ...

I turn a pile of pipes and a grill igniter into a powerful makeshift carrot cannon! Using various fittings and adhesives, I design a chamber for explosions with a three-way fitting as the barrel ...

The single-barrel GSh-301 cannon was developed by the State Unitary Enterprise “Instrument Design Bureau” in Tula, by renowned weapons designers Vasily Gryazev and Arkady Shipunov. It entered ...