How To Make A High Power Air Cannon - 2" Piston Valve (Barrel Sealing)

From a channel Lumen includes in full: Ben (NightHawkInLight) runs inventive home experiments in materials and physics (radiative cooling paint, aerogels, carbon lightbulbs) and publishes the methods and the failures; honest DIY science.

A 9-minute video from NightHawkInLight's catalogue; the title names its topic.

Video by NightHawkInLight, played through YouTube's embedded player.