New stats 3/4 QEV piloted by old 1/4 QEV, piloted by blowgun. Chamber up by almost 5 fold to just under 12 cubic inches. Same barrel (60 inch .625). Shots using CO2 at 400. I have tested both QEV valves to 600 PSI with the older, smaller chamber. Unfortunately I can't get past 400 PSI with the curre...

Nope. I'd never seen Klugeboy's work until just now on YouTube. Man, that guy likes heavy projectiles. The chamber fan(s) he uses are far superior to my Radio Shack Rave Fan. I have a fan stripped from an old nail gun I plan to use in a 3" chamber for aforementioned metal combustion launcher. The pi...

After pouring over this site I feel "outgunned" in every sense of the word. The quality of some of these cannons is at a level I'll probably never achieve. Granted I have no desire to build some of the cannons that DYI and Lars build. However, I'd love to be able to put together something like Gippe...

So, I built this about a year and a half ago. It's not anything too special and I am posting it more as a warning than to "Showcase" it :roll: Stats: Chamber- 4" sch 4 PVC, 30" Barrel- 2" PVC, 60" 80mm chamber fan run off 12v battery held inside the body. Ignition- Dual spark, run off an electric BB...

I'd be a little concerned about 1/8" fittings breaking with normal wear and tear (not pneumatic functioning, just getting knocked around). As long as they're not made of paper I wouldn't be too concerned. The guy is pretty well known in airsoft, bit hard to replicate his results without proper mach...

Brain, I see a couple issues with that. Firstly, I am not willing to open up the QEV until it fails. So far it has held up very well even at 600 PSI (see damage pics of 100 grain projectile through both sides of a steel tank). When it does fail I will certainly open it up and perhaps make the adjust...

GGDT is giving me the same velocity at (greatly) varying pilot volumes. What am I doing wrong?

Also, is there any issue in hooking up a 125 psi regulated CO2 tank, leaving the ball valve/fill open to achieve semi-auto mode? Perhaps a bit wasteful- but otherwise?

How did I know you'd comment first..... Cheers and thank you. Now that I uploaded an avatar, I see that your's is not holding a "cannon", but a captive bolt gun as well? Pilot volume: the only way I can see to reduce it is changing the female-female-male T from the 2" I have to a 1 3/8" OR changing ...

First off, a big Thank You to the members of this site. Although, seeing some of the cannons you guys build makes me feel like I'll never get to a certain level. After seeing Lardas' First Hybrid I considered trying to get a job at a Machine Shop :idea: Anyhow I started with a Cold Steel "Big Bore" ...