Will definitely be entering with our new pneumatic beast for the power contest. Glad to see this, videos forthcoming!

So was the guy at spudtech just BSing when he claimed he broke the sound barrier with this gun? http://www.spudtech.com/images/products/UOkcannonfull.jpg We're probably gonna go with 10-15' of 3" I guess. Hopefully we'll come close to the speed of sound anyway. I'm sure we'll all be happy no matter ...

So we went overkill then? Ugh... We really just wanted to make a totally badass gun to break the speed of sound. We're planning on pumping that 3" chamber to 150psi or so. We were also going to use a ball valve (so simple!) but after reading around, it seems thats not the best idea. I think we're go...

I did in fact mean 312inches; I have a total of 26 feet of chamber space (of course, it's not linear). http://img22.imageshack.us/img22/5954/chamber.png That's just a real quick (top down view) drawing of what our chamber looks like. There's four vertical chambers, 5' long of 3", plus the crossbeams...

Two questions: How important is chamber to barrel ratio in pneumatics? We're working on a new gun, in total the chamber is about 312 inches of 3" PVC. We were thinking of going with a 10 foot barrel (120) inches of 2" PVC (and perhaps down the road, 1.5"). Is this alright? Is the barrel too long or ...