Air powered cannon
This creation is a cannon that uses airpressure to push out it's projectile.
How does it work?
This creation excists out of a bottle, a ball valve and a barrel. The bottle can be filled with compressed air. When the ball valve is opened, the compressed air escapes through the barrel and launches the projectile.
Tested pressure was 8 bar. Used projectiles are; aluminium mole receder cones, a metal rocket, potatoes, pieces of cloth with flammable liquid on top.