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my first pnumatic
Posted: Thu May 10, 2007 9:28 pm
by cork9
Iv built a couple combution canons and now im gona make a pnumatic. IM in the prosses of building right know. Its gona be an over under syle and its gona have 48" or 36" (cant decide witch yet) of 3" air tank and an equal length of barrle(2"). then i should have 1.5:1 ratio. the thing is im using a 1" pvc ball valve. You think it will work good? Ill get pics up soon once i finish it. How do they compare to combutions? better, worse?
Posted: Thu May 10, 2007 9:33 pm
by JDP12
Okay...um have you read the spudwiki at all????
Umm...k to answer your questions. A ball valve wastes too much power. Get a sprinkler valve and modify it for the valve.
As for performance, pneumatics tend to usually be more powerful. They can hurl heavier stuff farther, et cetera..
I personally like combustions because they are portable.
Posted: Thu May 10, 2007 9:35 pm
by pyromaniac
Mopherman made a marble gun useing a 1 inch ball valve it shot exceptionally well. I was amazed because it was only his second gun.
If yoru right handed have the ball valve faceing left.
Posted: Thu May 10, 2007 9:38 pm
by cork9
are they as loud as combutions?
Posted: Thu May 10, 2007 9:53 pm
by pyromaniac
It really depends on pressure and barrel length. My canon isn't to loud.
Posted: Fri May 11, 2007 12:29 am
by frankrede
Why not get a metal ballvalve?
And I suggest having a longer barrel, ratios aren't like they are in combustions/
Posted: Fri May 11, 2007 6:17 am
by lukemc
metal ball valves are better because they open easer therefor faster and it you ever want a simple upgrade you can spring load it for faster opening time
Posted: Fri May 11, 2007 10:43 pm
by cork9
ok i just finished my cannon today. I tested it at 40 psi (cuse i wanted to give the new salvent a break) and with a potato it shot ok. it shot like 100-150 ft abouve my trees from like 150 ft behind them. so i think with 100 psi it will do preaty good. Pics tommoro !
Posted: Fri May 11, 2007 11:09 pm
by cork9
do u think thats decent results?
Posted: Fri May 11, 2007 11:12 pm
by pyromaniac
so you knwo there's a edit botton.
i think thats good for a ball valve cannon.
Posted: Fri May 11, 2007 11:16 pm
by cork9
whats something cool that i can shoot out of my 2" barrle becides produce
Posted: Fri May 11, 2007 11:22 pm
by pyromaniac
nerf vortex footballs fly far. ice.
Posted: Sat May 12, 2007 5:56 pm
by theRIAA
water, put lots of padding around an arrow and shoot that at something.
pics?
Posted: Sun May 13, 2007 9:37 am
by cb4289
make sure the plastic pvc valve is psi rated or it can blow up in your hand. as i'm told or what could happen with my cannon.
Posted: Sun May 13, 2007 10:06 am
by veginator
u should really get a metal ball valve the more u use it the harder it gets to open and close, plus it is so much easier to use