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my piston 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: LikimysCrotchus5 » Wed Apr 23, 2008 5:40 pm

Man i wish i thought about that sooner. For my 4 inch piston cannon, it was so hard to get the seat through, but i still manage to have interchangeable barrels, but at a higher cost.

But doesnt this method give you a large pilot volume?
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4SPC, My 4" piston 3" porting cannon
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Unread postAuthor: unisonmind » Wed Apr 23, 2008 5:46 pm

why it has nothing to do with the pilot volume
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Unread postAuthor: LikimysCrotchus5 » Wed Apr 23, 2008 5:48 pm

Well that depends on the piston size as in length or the size of the porting like the one in picture.
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4SPC, My 4" piston 3" porting cannon
Memo:
Fix up copper cannon
Fix up 4SPC
Start Stirrup pump
Start Toolies piston bazooka
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Unread postAuthor: unisonmind » Wed Apr 23, 2008 5:56 pm

ya but doing it this way doesn't add that much volume to the inside of the tee- its the fittings that you have to add to the back of the tee to make room for the barrel that adds volume to the tee so if you do it this way you can get everything in the tee and have all most no dead space
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Unread postAuthor: LikimysCrotchus5 » Wed Apr 23, 2008 6:02 pm

I dont think i understand what you are saying.

you cant really add volume to the tee because its fixed, you can only take away volume, like when adding fittings. There is less volume when you put the fitting in place because its taking up space.

Maybe a diagram? but if you dont feel like it thats fine :(
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4SPC, My 4" piston 3" porting cannon
Memo:
Fix up copper cannon
Fix up 4SPC
Start Stirrup pump
Start Toolies piston bazooka
User avatar
LikimysCrotchus5
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Unread postAuthor: unisonmind » Wed Apr 23, 2008 6:27 pm

Ill PM you-------
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