You can always make your own out of a flyback for a little under 30 if there is a good electronics store close by (NOT RADIOSHACK).

Well I finished it up today and put about 20lb through it for *cough* testing.

I also found out one of my dog's toys is a PERFECT fit. It's the rope with a knot on each side, with a heavy rubber ball in the middle. I was able to shoot it slightly more than half a block against 10mph wind (surprised ...

Heh! Not to rub it in, but one drunken day when I decided to cut my racecar in half (after hitting the wall at 80-some mph, broke an axle), she ended up joining in on the fun. I've never seen a girl actually enjoy cutting steel with a torch.. she didn't even wear gloves (mah girl!)

http://www ...

Well got some work done today, and a few test fires in.

Test fires were with a 6" halfinch tube for the propane meter (borrowed off the smaller cannon). Anyhow, I only had old potatoes that wouldn't seal well at all. You'd hear the explosion and see the fire, then along comes the potato. Finally I ...

I've built a few combustion cannons, but after reading around here about how easy it is to mod some common solenoid-activated sprinkler valves, I decided to buy one. I'll head to Lowes in about 2 hours, but one thing I couldn't find from searching was large of a barrel I can use with a 1" valve ...

Yeah, no ignition on it.. yet. I didn't make it downtown in time to buy one of their cheap Chinese tazers. I'm staying up tonight anyhow (damn you night shifts.. on the day off I can never go out during the day). Anyhow, tomorrow I'm going to pick up the tazer, and go ahead and make a pneumatic ...

Well, I've built about 4 cannons so far. First 2 were your run of the mill inline ones, but very small (2" chambers!). Anyhow, my first large cannon was a 48" 2" barrel with a weird 4" Y connector. No idea on how much fluid it held, but I managed to get propane ignition working on it using a 6" 3/8 ...