well, I'm trying to wire a new ignition system for my gun, and its not working out that well.
the system has a 9 volt battery, automotive ignition coil, and a spark plug.
I've ran a plug wire from the plug to the center plug on the coil, and then positive/negative wires from the coil to positive ...

For my second gun, I decided to go bigger, a lot bigger. However, due to my relatively little experience and funds, I decided to keep it a basic combustion type gun.
What resulted?
A 2" x 108" (9 ft) barrel with a 4" by 24" (2ft) chamber, for an overall length of 11 feet. The C:B ratio is about 0 ...

yeah, well i built it today.
took a while to work out some problems but its really nice
im using potatoes right now, and id like to switch to propane sometime when i get some more money.

ill post the exact specs in the cannon forum

ahhh thanks! burnt latke didnt mention that, or else i read too fast

how did a basic combustion break?
the barrel woudn't come unscrewed from the chamber, so i hit it against a wall to see if it would loosen it. bad idea. it snapped.
the combustion was basic hairspray and any other flammable aerosol i could get my hands on.
soryy i dont have any pics.

whats wrong ...

hey im working on my second potato cannon, first one was a basic combustion one, but it broke :(
now im trying to build number 2, same basic combustion system, but bigger!
now, keeping a 1.5 C:B ratio, would having a 4" x 20" chamber with a 1.5" x 84" barrel be dangerous because of the sheer size of ...