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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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Unread postAuthor: BC Pneumatics » Mon Jul 16, 2007 1:25 am

Frank,
Pipe can stand more pressure on the outside than it can from the inside, so I would not worry about SDR 21 in a coaxial gun.
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Unread postAuthor: MrCrowley » Mon Jul 16, 2007 1:53 am

@JSR

You could put a pen clip on that and keep it in your breast pocket with a mini air compressor strapped to your chest like you were a undercover FBI agent :D

But thats not really a design is it, more a concept gun, I think the OP is talking more about the guns layout. :wink:
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Unread postAuthor: jackssmirkingrevenge » Mon Jul 16, 2007 2:04 am

I know I know, it's the dry Spanish air screwing with my brain. Or it could be the Spanish beer lol.
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Unread postAuthor: frankrede » Mon Jul 16, 2007 2:14 am

BC Pneumatics wrote:Frank,
Pipe can stand more pressure on the outside than it can from the inside, so I would not worry about SDR 21 in a coaxial gun.
Oh. I stand corrected, so the forces wouldn't cause it to buckle at all?even with sdr-21's thinness?
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Unread postAuthor: trae08 » Mon Jul 16, 2007 7:17 am

if i did decide to make a homemade valve which would prove to have better performance?

edit:::i read on anothr forum that Barrel Sealing Piston Valve is one of the best valves to make... is that true?
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Unread postAuthor: lukemc » Mon Jul 16, 2007 7:40 am

BC Pneumatics wrote:Frank,
Pipe can stand more pressure on the outside than it can from the inside, so I would not worry about SDR 21 in a coaxial gun.


on the spud tec forums someone made a coaxal with 1.5" sdr 21 pipe. im not sure at what pressure but the pipe actualy collapsed onto it self. i cant find the link right now but ill keep looking.

EDIT: i cant find the original topic but i found someone who refered to it
Snapc3 was the unlucky winner of a crushed gb barrel. The stuff is rated for pressure, but that pressure is supposed to be internal. Burying it obviously puts it under pressure, but not of the magnitude we use apparently. Sleeve it.
http://forums.spudtech.com/topic.asp?AR ... IC_ID=1909


EDIT EDIT: haha! i copied the number at the end and replased the one on the browser with it and found the page CLICK ME
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