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First cannon

Built a pneumatic cannon? Then post it here! This section is for completed, finished cannons that you have built. Please include pictures and information.
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First cannon

Unread postAuthor: Juggernaut12121 » Fri Mar 14, 2014 6:05 pm

Alright well this is my first halfway decent cannon, I built it a while ago but just got around to posting it. My actual first cannon broke and afterward I took some time to build this one (much nicer by comparison). Anyway it's pretty noobish but I like it.

Valve: 3/4" Modified Sprinkler valve
Fill Valve: Schrader Valve
Maximum effective range: Unknown
Average Velocity: Unknown
Calibers/Barrels: .5", .7", & .75"
Max Pressure: 120 PSI

I have a pretty small yard, the longest line of sight is about 40 feet, and it's pretty accurate at that range. With ammunition like penny stacks or co2 cartridges it will easily pierce plywood.
It's pretty loud too, at 70 or 80 PSI it'll ring your ears. I've tried to get the velocity by shooting it straight up and measuring the time it took to fall back down (since I don't have another means of doing so that I can think of) but the projectile always came down elsewhere and I wasn't able to see or hear where.
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Re: First cannon

Unread postAuthor: jackssmirkingrevenge » Sat Mar 15, 2014 7:54 am

Not bad for a first effort, here's to bigger and better ;)
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