Originally Posted by beergut

I dug up some pics of my potato cannon-

uses propane and a meter valve- and the 4 spark combustion rail system I designed using the electrical components from a gas range the barrel is double-wall with foam insulation in the barrel void- the combustion purge fan came out of a desktop computer.
I'll post some finished pics later- right now it's black, has a pipe stand and a remote user control box
I swear I can hit the moon with a potato-

anyone else into launching produce at the spped of sound

Originally Posted by Scootergptx

Careful, it's the ghost of the upside down Polaris.

Originally Posted by MooseHenden

We just did the basic one with a screwed on end cap. Put the potato into the narrow 1.5 in. inside diameter end, shoot hair spray in the other end. Quickly screw cap on and use a clicker style grill ignitor to cook it off.

Originally Posted by beergut

that was how I made my first one- then I began improving them over the years
About 8 years ago I once used acetylene in one- knocked my *** on the ground (literally), blew the back cap off into my vinyl siding cracking it and launched the potato to god knows where
The siding is still cracked and that was the last time I ever used acetylene in a spud gun

Originally Posted by cncpro

Beergut says: "I don't always blow myself up but when I do I prefer flammable gases"

Originally Posted by Jaster94

beergut, i hope you've never contemplated hydrogen. just remember the hindenburg.