what psi is the pop off valve?

just wondering how does the full auto work? great looking gun btw

Thanks for all the help everyone. tech so what you're saying is that my barrel to restriction ratio should be 2:1? I'll probably just downsize the barrel for golf balls. Now i know what to improve for my next project, thanks. Heres some pics of my cannon, im pretty sure it's pressure rated: http://i...

hi, im a little new to all this, i just recently finished my pnuematic cannon and i was test firing it the other day and i wasn't getting the distances i was hoping on achieving. It's an over under cannon with a sprinkler valve activated by a blowgun. The chamber is 2 ft long and 2" thick with a 5ft...

i mean like putting a cup of water down the barrel, but i thought there was a special way to do it to get better range and what not, but from your comments i probably shouldn't be doing this. Rookie mistake.

saw some people shooting water out of their cannons and was wondering whats the best way to do this.

cannon is an over-under pneumatic with a modded sprinkler valve with a 2 inch barrel.

c11man wrote:you are putting the air in on the wrong side...

switch it and it will be fine.

when you put air into the output side it is very common for the air to leak around the area in red in your pic

lol rookie mistake

thanks got it working fine

its leaking where i circled in red. I think i have it the right way, the 1/8 port is where i have it screwed it(circled blue)

I recently modified my sprinkler valve and i can only get to 60 psi because all of my blow guns leak in the same area. I have a ch one and that one leaked, so i thought it was broken, so then i went to go buy a husky one and that one leaks in the same area to. Is this a common problem and what can i...

my valve lets out air and makes a honking sound, it says the pilot hole needs to be bigger, is this the hole on the top where the blow gun connects to? Currently i have a 1/4 inch brass fitting to a 1/4 to 1/8 reducere? how much bigger do i need to go?

wow thats alot, damn i already started on mine..

can one use a 3/4 valve? will there be a big difference in power compared to 1 inch valve?