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co-axial with mag idea

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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co-axial with mag idea

Unread postAuthor: Major Collins » Thu May 19, 2011 11:54 am

alright heres my idea i could only draw it up in 2d becuase drawing this in 3d was far too difficult
the legend is
blue is piston , green is bolt with oring ,purple are holes in the bolt , red is barrel and magazine housing, black is outer chamber and spring

before firing / at rest - closed breach
Image

being fired / open breach
Image

what do you think?
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Unread postAuthor: Mimikool » Thu May 19, 2011 12:10 pm

If i understand, the projectile is in the magazine, and it enter in the barrel when the piston recoil?

But the recoil is quick, so i don't think that the projectile gat the time to enter completly in the barrel, and the schema is simple but i feel that the the pressure will go in the magazine.

And the sealing between the reserve and magzine will be so difficult, you can use epoxy, but the pressure will be limited.
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Last edited by Mimikool on Thu May 19, 2011 12:16 pm, edited 1 time in total.
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Unread postAuthor: Crna Legija » Thu May 19, 2011 12:14 pm

Mimikool wrote:But the recoil is quick, so i don't think that the projectile gat the time to enter completly in the barrel, and the schema is simple but i feel that the the pressure will go in the magazine.


yea you will need a air tight mag, and the bolt is use less unless its for feeding.
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Unread postAuthor: Copperboy » Thu May 19, 2011 1:34 pm

I made something similar a while ago, although It stopped the marbles from rolling down into the breech when the bolt moved back.

As Crna Legija said, the movement of the bolt will probably be to fast for it to cycle properly. Skip the spring and let the air from refilling do the job, that way you can choose how fast it´ll cycle.
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Unread postAuthor: jackssmirkingrevenge » Thu May 19, 2011 11:58 pm

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Unread postAuthor: shardbearer » Fri May 20, 2011 4:10 am

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