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help with a pen gun piston

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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help with a pen gun piston

Unread postAuthor: Mr.Sandman » Fri Jun 13, 2008 1:23 pm

i am making a pen gun like jsr but everytime i try to make a piston gun it does not seal properly and all the air goes out the barrel while i try to pump it. does anybody know how to make a good piston for a pen gun and also i would like to know what i could use for a barrel.
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Unread postAuthor: SpudFarm » Fri Jun 13, 2008 1:33 pm

pics
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Unread postAuthor: Gippeto » Fri Jun 13, 2008 1:36 pm

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Unread postAuthor: jackssmirkingrevenge » Fri Jun 13, 2008 1:58 pm

Details of how you made your piston and seal would be help us help you ;)

As to barrel material, check out your local hobby store - they should have a selection of brass and aluminium tubing of various diameters. If not, you can order such materials online.
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Unread postAuthor: psycix » Sun Jun 15, 2008 8:28 am

The easiest option is to cast it out of epoxy or hot glue.
Or just find some random thing that fits in snuggly and convert it into a piston.
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Unread postAuthor: sandman » Sun Jun 15, 2008 9:05 am

All, i have to say, is u tried to steal my name <_<

and as the others have said more info is needed for us to help you
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Unread postAuthor: elitesniper » Sun Jun 15, 2008 10:31 am

wow, more people are getting into the pen gun thing :D , I think you should try making some larger scale coaxial pistons so you can have a bit of experience on this thing, small things like the pen gun are very hard to have everything go right for you, and everything is sealed in already once you make it. :o
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