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most portable design?

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
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most portable design?

Unread postAuthor: trae08 » Sun Jul 15, 2007 4:05 pm

well as some of you may or may not know ive been planing on building a portable gun. and since the first parts should get here on the 17th and then ill start building. so since the whole gun is revolving around the word portable i was wondering what would be the most portable design? ive been leaning towards an over an under. so whats yalls input?

the dimensions are as follows.

5 ft of sdr21 golf ball barrell
16.9" of 4" for the chamber
and a modded 2 inch sprinkler valve.
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Unread postAuthor: paintballuh » Sun Jul 15, 2007 4:13 pm

id say build an over under, then attach a bike pump to it for ultimate portability.
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Unread postAuthor: trae08 » Sun Jul 15, 2007 4:15 pm

nah this is the 21st century im hooking it up to a regulated hpa tank for paint ball.
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Unread postAuthor: iPaintball » Sun Jul 15, 2007 4:30 pm

An over and under is one of the most portable designs, but coaxials take up less space. You can get cheap 1.5" SDR 21 at Tractor Supply Co.
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Unread postAuthor: paintballuh » Sun Jul 15, 2007 4:30 pm

make sure you turn down the regulator...my friend blew up the regulator on his ion when he first got it. he put like 300 psi into a 200 psi gun.
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Unread postAuthor: trae08 » Sun Jul 15, 2007 4:37 pm

ur friend blew up his reg or his gun?
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Unread postAuthor: spudgunnerwryyyyy » Sun Jul 15, 2007 5:50 pm

Cut the tank and half put them side by side then use a 2" tee to with 2 elbows to get the tanks connected to the valve then do over under.

Looks like this looking at the barrel.

( ) Barrel
( ) ( ) Chamber
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Unread postAuthor: f.c » Sun Jul 15, 2007 6:35 pm

well yes you will need an air supply. but maybe you're pipe size is to big ?.
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Unread postAuthor: lukemc » Sun Jul 15, 2007 6:55 pm

2" sprinkler!! thats a very expensive valve especily when piston in tee valve is definetly better in all aspects because its over under
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Unread postAuthor: spudthug » Sun Jul 15, 2007 8:19 pm

You can get cheap 1.5" SDR 21 at Tractor Supply Co.


hmm i wonder who found that out :wink:

btw yes make an over under but why not make it a piston valve? cost alot less and it will be alot more powerful..
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Unread postAuthor: frankrede » Sun Jul 15, 2007 8:32 pm

sdr 21 pipe would not be good in a coaxial.
Its thinwall and teh pressure would cause it to fail.
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Unread postAuthor: trae08 » Sun Jul 15, 2007 8:44 pm

the 2 inch valve was free
the sdr is sleeved in sch 80.
and ive never made a piston valve before.
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Unread postAuthor: NoXi » Sun Jul 15, 2007 9:12 pm

paintballuh wrote:make sure you turn down the regulator...my friend blew up the regulator on his ion when he first got it. he put like 300 psi into a 200 psi gun.


you cant blow up the reg., but you can blow up the solenoid in the gun. The reg is able to take 300 psi easy, jus that the solenoid in the gun isnt made able to take that much.
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Unread postAuthor: MrCrowley » Sun Jul 15, 2007 11:18 pm

Well you have to make a piston sometime :P

I say if your staying with the sprinkler valve an over-under design using street elbows to cut down the gap between barrel and chamber.
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Unread postAuthor: jackssmirkingrevenge » Mon Jul 16, 2007 1:15 am

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