Pneumatic piston?

[acs2997]

Has anyone tried making a piston that pushes when pressurized and retracts when the pressure is relieved? I was thinking of integrating one into my gun, but i want to know the practicality of it before spending (more) money on making one.

[matti]

Could you be a little more specific on what part of the cannon you mean, valve or loading system or what piston ?

[acs2997]

reloading system, not as a valve. I mean one that is completely sealed that acts just as a hydrolic piston

[matti]

Not sure how are you going to integrate it, but cant you use small pneumatic cylinder for that ? they make ones just like you described

[acs2997]

how much do they sell for?

[matti]

You can find cheap ones from ebay, or local scrap metal yards that sell all kinds of stuff.. I have many cylinders that i bought at about 2-5euros each.

From what you have described I would think that you should look for single acting cylinders.. opens with pressure and returns with spring.

[acs2997]

thanks! that saves me the stuggle of making my own!

[CS]

Single acting:
https://www.surpluscenter.com/sort.asp? ... yword=ACSA

Double acting:
https://www.surpluscenter.com/sort.asp? ... yword=ACDA

Check eBay of course, but these guys sell them pretty cheap.

[acs2997]

Thank you so much! these websites are perfect! To be honest, I hate eBay. I've never had a good experience with them. This seems perfect. I'm sure I can find one to use.