Love this, only 90mm in length absolutely mint in a near perfect box showing slight signs of age with small tear by the hammer, faded on one tab and a bit grubby on the back. Using steel and much higher pressures of 800psi (55bar) or more, but achieving these pressures is difficult. The range of pneumatic cannons is more variable than the range of combustion spud guns due to the increased variation possible in the components. Alternate designs have also been used which use a sharp projectile to puncture the burst disk, like a mortar [16] or using a manual puncturing device to trigger failure of the disk.

Chicken cannons: Many aircraft parts must be able to survive the impact of a bird in flight, known as a birdstrike. I know, Gun Laws in the US are much, much less strict than they are here in the UK, and fair enough if governments have different considerations - but if a Potato Cannon is NOT considered a Firearm in the US, WHY is it in the UK? In spite of what you say about your land being in the middle of nowhere, someone will own it and someone will have access rights to it although,I admit, maybe not the public. In the Workaholics episode "To Friend a Predator", a Potato Gun is used in an attempt to stop the protagonist, but instead hits Blake in the back. OSHA Safety Hazard Information Bulletin on the Use of Polyvinyl Chloride (PVC) Pipe in Above ground Installations".A potato cannon is usually made out of PVC (Drainage) Pipe, a potato is rammed down the long end (the barrel), some hairspry (or deodrant) is sprayed into a large barrel (the combustion chamber) , it's sparked using a sparker of any kind, and the potato goes flying.

A MythBusters episode tested a potato cannon held together by duct tape compared to one held together using PVC bonding agent. Combustion launchers are usually less powerful than their pneumatic or hybrid counterparts, especially when hairspray / alcohol is used as a propellant.

These timing issues can cause belief that the cannon has failed to fire but attempting to unload the cannon may then provide the extra stress on the bottle needed for it to rupture.

Just make sure nobody spots you and fire the cannon on your or a friends piece of land, between trees and far away from other homes if possible.In the film Tremors 3: Back to Perfection, Jack Sawyer suggested to Burt Gummer that they build a potato gun to fight the Ass-Blasters. Aircraft canopies, engines, and critical flight control surfaces will normally undergo this type of stress testing to determine whether they are strong enough to withstand a birdstrike in flight.