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Slider Collapseable

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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Slider Collapseable

Unread postAuthor: quiggly17 » Sat Jan 26, 2008 7:35 am

this is my new work in progress i call it the slider the chamber collapses in the barrel like a m72a1 law


the gun collapsed
Image

the gun extended
Image

the gun has a 2in barrel it will be powered by 12 gram co2 i still have to work out a few things but the slide works and the slide lock ill post more pics later
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Unread postAuthor: jrrdw » Sat Jan 26, 2008 7:49 am

How do you keep the slip joint from leaking once the barrel is extended? Some kind of compression flare???
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Unread postAuthor: Hubb » Sat Jan 26, 2008 7:54 am

jrrdw wrote:How do you keep the slip joint from leaking once the barrel is extended? Some kind of compression flare???


Wondering the same. BTW, if it works, it will definitely be a piece of work. Looks good so far.
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Unread postAuthor: Hotwired » Sat Jan 26, 2008 8:37 am

O-rings and enough contact area to prevent excessive wobble which might lift the rings and cause a leak should keep the seal.

Looking good.

I sketched up a collapseable combustion design a while back which can be even simpler as the projectile seals the barrel from the chamber so it's essentially what you have there minus the ball valve and plus a couple of wires and a screw cap.
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Unread postAuthor: bigbob12345 » Sat Jan 26, 2008 9:52 am

that is awsome how much power does it get and got any specs

Edit: your chamber pipe is dwv and should not be used above 60psi
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