wow great first gun, pretty impressive for a first one...cant wait to see more from you!

yea well, the chamber's been cut in half...too late now .... im just waiting for the solvent to dry so i can test it

yea ive been messing around with the GGDT a lot and ive noticed (also with common sense physics) that the smaller/smaller more heavier object will travel further. i got the 2'' barrel because it seems to me that the average ordnance size is 2'' or less. plus if i plan on shooting golfballs or someth...

lol, i dont think you caught the fact that i was WAY exaggerating when i said "987,585:1" ...im just about done solvent welding all my pieces into place and ill let it dry and hopefully i may be able to test fire it again soon.

yes i think if i calculated correctly my C:B ratio is around 987,585:1 ... so thats why im thinking about chopping the chamber in half

Alright, I've gotten my first pneumatic cannon up and running, ive got my potatoes (other random ammo)...only problem though is that i think m y C:B ratio is way off. when i went to home depot i went ahead and bought a 10' x 2'' barrel, and i have a 10' x 3'' chamber. i would love to start shooting ...

alright, safe of mind is all i need. actually the only other thing i need is fixing my C:B ratio lol. i first made it with a 10' x 2'' barrel, and a 10' x 3'' chamber (yes i know the C:B is way off but my friend and i were joking about how BIG it was) i do plan on getting a 3'' coupler tommorow and ...

yes, i have all NSF-PW fittings.

i guess the question now is: its perfectly safe to take it to say 100 psi. or so ?

lol, i guess the reason why it makes me really nervous is because when i work with a combustion cannon, the pressure packed inside goes "boom" and then its gone. but with a pneumatic cannon , you have to wait for it to fill really slowly, as if its building suspense

the one leak that i can hear is coming from a 90 degree elbow in the back, at 60 psi. its a small whisper of a leak. all up and down the cannon ive put my ear to everything and that's the only place ive heard a leak. i had originally had two leaks (1/4'' fitting on my modded sprinkler valve) but i a...

ah, sorry i forgot to mention those things.

all the fitting are pressure rated, and i used PVC primer and solvent to "glue" the pieces together

i do not have pictures of it yet, my camera's batteries decide to crap out every time i want to take a picture of something

Well, I'm not new to building combustion cannons, but i am new to building pneumatic cannons, after i built mine yesterday, i let the glue dry until today and was just testing it at around 30 psi. or so. my question is, how high can i safely take the pressure? I'm deathly afraid it might explode in ...