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sniper rifle chamber question

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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sniper rifle chamber question

Unread postAuthor: Strake » Sun Dec 30, 2007 4:06 am

ive got a piece of metal pipe laying around 25mmx250mm would this be sufficient for a sniper chamber or would it lose alot of power. im after something that takes minimal to pump up to high pressures and is able to shoot a marble at around 700ft/Per sec.
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Unread postAuthor: Carlman » Sun Dec 30, 2007 4:23 am

that would suffice i would say, although it still all comes down to the pressures you are using it at.

and what kind of metal pipe, is it even rated?
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Unread postAuthor: Strake » Sun Dec 30, 2007 4:23 am

dunno its thick tho so i'd say it would be, i want to put it around 300psi in it.
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Unread postAuthor: Carlman » Sun Dec 30, 2007 4:40 am

dunno is not the desired answer to a pressure rated question!

is it steel, copper, alloy ...?
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Unread postAuthor: Strake » Sun Dec 30, 2007 4:41 am

Steel pipe..............................mesage to short lol
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Unread postAuthor: Carlman » Sun Dec 30, 2007 4:52 am

i havnt personally worked with steel but it should be good, does it have weld down one side?
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Unread postAuthor: MrCrowley » Sun Dec 30, 2007 5:00 am

300psi should be ok in steel. With a 1.5 metre barrel and a piston valve you'll easy get 700fps.

What valve did you plan on using.
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Unread postAuthor: Strake » Sun Dec 30, 2007 5:39 am

nice thats good then the chamber will be longer when i weld the other section of pipe on up to the piston. also will a MIG weld be capable of holding pressure up to 300psi because i am going to weld everything together instead of buying all the fittings.
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Unread postAuthor: The Kid » Sun Dec 30, 2007 5:48 am

from what i'm reading i would probably agree with Crowley that the steel would be able to hold 300 psi, do what he said and use build a piston valve and just out of curiosity are you using an air compressor or a pump.

cheers
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Unread postAuthor: Strake » Sun Dec 30, 2007 5:49 am

either most probably a pump but i will use our air compressor when im lazy
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Unread postAuthor: The Kid » Sun Dec 30, 2007 5:53 am

Strake wrote:either most probably a pump but i will use our air compressor when im lazy


lol fully sick i dn't think i would b able to get to 300 psi very easily with a pump oh well anyways good luck with the sniper.
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Unread postAuthor: Strake » Sun Dec 30, 2007 5:54 am

cheers mate. ill have to find a shock pump or something because i broke dads last one he still dont no yet.
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Unread postAuthor: The Kid » Sun Dec 30, 2007 6:03 am

Strake wrote:cheers mate. ill have to find a shock pump or something because i broke dads last one he still dont no yet.


kewl i was't thinking about shock pumps. btw not as bad a me i broke my dads $200 (i think) hammer drill
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Unread postAuthor: Strake » Sun Dec 30, 2007 6:05 am

thats no good did u pack it up and wait for him to use it and blame it on him :twisted: thats what i done with his pump lol he will no i done it tho.
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Unread postAuthor: jackssmirkingrevenge » Sun Dec 30, 2007 6:07 am

at that size it should be a reasonable chore to take it to 300 psi with a shock pump, and with a decent barrel length and valve your velocity target for a marble would be realistic.
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