I'll check the battery, and I know its hooked up right because I did it (that sounds really snobbish....). I'll check the bleed valve, but I know the valve is on the right way (it has a flow arrow!). I don't think it was the glue (and by the I assume you mean PVC cement) because I had built it over ...

I recently built a pneumatic cannon using the plans on PVC Ballistics with minor modifications to the placement of the solenoid valve, and I also used 1.5" rifled PVC for the barrel. One of my good friends helped me pay for it and would have helped me build it, but pretty much all there was to do wa...

Fortunately, I live outside the city and my neighbor owns most of the land surrounding my acre lot. You might not think this is great until you find out that he planted a bunch of trees there! Yep, my firing range is a field with a whole lot of seven foot tall trees. When I want to see more clearly ...

Will any type of epoxy work, or does it need to be specifically for pipe?

I think that using a projectile with stabilizing fins would help improve your accuracy/getting it there-ness.

deathtodeer666 wrote:with a manual tranny because i like to DRIVE not be driven.

You can have mine! I don't particularly like manual, but all the redneck guys at my school think I'm really lucky. I keep telling them I'll trade for an automatic.

After reading cardinals' post, it occured to me that it might be like combustion guns. I'm beginning to think that the ideal chamber size is such that it releases air, thereby increasing pressure in the barrel and accelerating the projectile, until the point of negative return (the point when barrel...

What do you mean by stripped out? Messed up the threading?

While we're on this subject, should I wrap the gauge threads in teflon tape?

Was that meant to be sarcastic or did I just read it incorrectly?

Another question.

I'm using the over-under form for this cannon, and I'd like to know if putting the valve before or after the 90 degree elbows (or perhaps between, although that would be awkward) would be better?

How much does the volume of compressed air released from the air pipe into the barrel affect the muzzle velocity of the projectile? Does modifying the valve have a more profound effect? In other words.... which will produce the largest increase in power: making the air pipe longer/wider or modifying...

Just because I'm paranoid....

The theads will hold the pressure gauge and schraeder valve in place when SCH 40 pipe is pressurized to 100 PSI?

Has anyone here ever heard of the Hindenburg?

Okay, I think I'll be able to get it reasonably straight. Do most gauges and valves come with a nut to secure it from the inside, or do you just rely on the threading?

Hello again. I've been gone for a while, but I'm back. I'm about to start putting together the pneumatic cannon I was talking about earlier here, but I have several questions. I've never used a tap, but I think I need to tap the holes for my pressure gauge and schraeder valve. I ordered both of them...