we used to make potatoe launchers when i worked for a place that made those air tubes in shops n offices to carry cash or paper long distances in a vacum tube..
the mini launchers would fire a potatoe well over 300m.. thats only an estimate cause the fired in the air and never seen again...
When I was in the Air Force we made a mess cannon out of catering pack coffee tins
Fired an 8" paper&tape cannonball over 100m across the airfield using lighter fluid propellant
Ben
I've got an inferiority complex But its not a very good one!
When a skinny apprentice I found that if you plugged a whole 100m coil of airline hose into an airline at 100psi after you've filled it with 1/8" cap head screws it fires like a machine gun.
Also made bolt bombs with BROWN matchheads. They're absolutely safe until you heat them..........try it with small bolts first, 8mm makes a satisfying crack.
Mmmmmm satisfying crack.....
It's not falling off, it's an upgrade opportunity.