Piston Valve Question

Cannons powered by pneumatic pressure (compressed gas) using a valve or other release.
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Fnord
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You really want as little travel as you can(past 1/4th the barrel diam), as letting the piston accelerate more will put more stress on the fittings it hits when it goes back.
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jackssmirkingrevenge
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_Fnord wrote:You really want as little travel as you can(past 1/4th the barrel diam), as letting the piston accelerate more will put more stress on the fittings it hits when it goes back.
Not only that but the more travel it has, the larger the pilot volume, meaning the pressure will drop at a lower rate therefore the piston will open slower, and that means less performance.
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dapallox1
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Okay, thanks for all of the help guys, you all really helped clear things up for me. Thanks again. If I have any more questions, I'll post. :D
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MrCrowley
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jackssmirkingrevenge wrote:
Which one opens faster depends on this size of the piston and piston seat
Also weight of the piston, size of pilot chamber, pilot valve flow rate/opening time, size of equalisation hole...
I think it was barrel sealers open slower but have higher flow
Where did that come from?
No idea, somewhere though back in the day when I started out. Hence the 'I think' and 'i'm not 100% sure' in my post.
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