SpudFiles

Hey, since this is my first post on spudfiles, i figured i'd save it for something good. This is my scuba tank driven cannon that shoots paintballs. It runs off a scuba tank (sorry for redundancy) @3000 psi. I use the low pressure port on the scuba tank regulator (about 150 psi) hooked up to another regulator that i usually dial to about 50 psi to fill my chamber It also uses a piston valve actuated by a modded sprinkler valve.
Volume of Chamber: 40.82 cu in.
Volume of Barrel: 15.9 cu in.
B:C ratio= 2.567:1
(numbers are rounded)



Pix of Cannon, i'm new and i don't know how to upload them to the forums

very nice. i like the piston it has a bumper right on it. and that scuba tank is kind of small for a scuba tank lol.

the scuba tank is a pony bottle, not used for actual diving, i've mostly used that one for air-brushing

thats very nice. not many people have a tank right on the cannon. how many shots can you get out of it?

you did a really good job on it.

Looks great, only the stock from the copper makes it look...... strange
GR.Tom

Looks great, only the stock from the copper makes it look...... strange

If you paint it all, it will look less strange, i actually dont have a problem with the copper though.
Nice cannon

the copper is actually for a later attachment for a different size scuba tank (even smaller) called a micra, i'm pretty sure it still holds 3000 psi and it's small enough to just adapt a new stock that holds the tank. That is where the copper idea came from, more stability and strength
p.s. i know i'm not very good at sweating

Edit: about the number of shots, i haven't been able to drain the entire tank yet so i'm not sure

Thats pretty tight man. Well yah the stock doesn't fit in but the gun is great. One question, why did you go out and build a piston valve for a tank chamber that small? Is it just to build something totally kick ass or to know that your awesome because you did it. On a chamber of that size just the sprinkler valve would lead to great performance.

What size barrel is that?

Its a paintball barrel, probably 3/4" pvc as that is the most popular. Thin wall 1/2" works too.

ya, barrel is 3/4" pvc, i think i tried 1/2" cpvc but the paintballs fit too tightly and i try to upgrade on every new gun i make so the piston valve was a natural upgrade from my old gun

Sweet, saving money and hours of work is always a good thing. I used to recycle but now I find building new stuff is very rewarding because then in the end I have like four working guns and I just have to go w00t.

I wanna see a few more damage pics, and maybe some of whatever is in that bowl in the fifth picture.

Nice gun, but I would think that the copper and white combination would be a little non aesthetic. Painting it would change that

hey guys, thanks for all the great comments, i'm suprised to see such a great outcome on my first post, and about the lack of damage pics, i have only gotten a chance to shoot for about an hour so far, life has been more important for the past few days, this weekend I should be able to upload more damage shots. Regarding the painting, my guns change so fast and as i mentioned the copper is going to serve a specific purpose later so painting isn't likely to happen unless this gun's performance is so amazing that it's worth keeping the gun intact