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pneumatic repeater sidearm

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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can it be done?

yes
2
29%
no
1
14%
mabey with a box of red bull and a block of high explosive
4
57%
 
Total votes : 7
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Unread postAuthor: inonickname » Thu Jan 15, 2009 8:24 am

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Admittedly, it was inspired by JSR's blow forward breech (and his numerous other designs). That could work for building a pistol.
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Unread postAuthor: psycix » Thu Jan 15, 2009 9:46 am

Well, you did make a blow-forward part there. But it does not move any bolt.
What is the function of your collar there?
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Unread postAuthor: Hotwired » Thu Jan 15, 2009 11:02 am

It'll interrupt the flow giving bursts of gas.

Its likely to cycle very fast however (thousands of cycles per minute with such a small moving part) and that won't necessarily translate to a faster rate of fire.
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Unread postAuthor: scavies » Thu Jan 15, 2009 5:03 pm

Sir, to make this, you would need infinite patience, but could I request that you find your way to a CNC machine at an institution?

Maybe you want to use a design similar to a recoil operated paintball gun. Always good to take advantage of newton's second law...(is that right?)
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Unread postAuthor: IA_Armourer » Sat Jan 17, 2009 4:38 am

Im thinking of scaling it up to the size of a rifle.

is anyone else thinking M1 Garand.

I am
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Unread postAuthor: sputnick » Sat Jan 17, 2009 8:42 am

wow, not just "inspired" so much as copied, and as much as I hate to admit it, that was one of my least favorite of JSR's inventions, because as soon as the plunger pushes back past the hole in the pipe, air is just sitting there acting as a cushion until enough air escapes through the cracks and it slides back. Make it smaller, his was F-ing huge for basically nothing. Use the little device he had in his (almost) auto, the more recent one. and this kind of idea only applies to bb's, you can try with stuff like paintballs, but it will be crap with the flow from a blowgun, especially with the dead space in your mech. there.

And I agree with everyone else, you need a bolt, otherwise the ammo will just all roll into your gun, then you have a one shot spray gun.
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