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Simple coaxial BB handgun

Built a pneumatic cannon? Then post it here! This section is for completed, finished cannons that you have built. Please include pictures and information.
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Unread postAuthor: mopherman » Tue Aug 21, 2007 4:14 pm

very nice. what kind of epoxy did you use? Im planning a similar gun.
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Unread postAuthor: MisterSteve124 » Tue Aug 21, 2007 6:07 pm

Cool looks like a nice simple gun.
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Unread postAuthor: jon_89 » Tue Aug 21, 2007 8:20 pm

how far did you take your shots from?
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Unread postAuthor: noname » Tue Aug 21, 2007 10:12 pm

I've always wanted to do something with copper, but at $5 a foot for 1/2" type M, it's just too damn pricey for me.
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Unread postAuthor: coolhippy80 » Wed Aug 22, 2007 12:50 am

i dont get it.... whare is the barrel? is it insde the chamber?.... how does it work? sorry, i am a noob :oops:
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Unread postAuthor: jackssmirkingrevenge » Wed Aug 22, 2007 1:28 am

coolhippy80 wrote:i dont get it.... whare is the barrel? is it insde the chamber?


Yes it is, it's a co-axial (barrel concentric with the chamber) with a piston valve, look here to see how it works.
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Unread postAuthor: SpudBlaster15 » Wed Aug 22, 2007 11:19 am

Mopherman: The epoxy I used is called PC Super Epoxy. Unlike most epoxies, it is highly elastic rather than brittle.

Jon_89: The shots were fired from ~2 inches away.
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Unread postAuthor: MisterSteve124 » Wed Aug 22, 2007 1:15 pm

I'll have to look for that next time I'm at the store. I always hate how epoxy is so brittle pieces always get chipped off.
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Unread postAuthor: mopherman » Wed Aug 22, 2007 2:04 pm

SpudBlaster15 wrote:Mopherman: The epoxy I used is called PC Super Epoxy. Unlike most epoxies, it is highly elastic rather than brittle.

Jon_89: The shots were fired from ~2 inches away.

would'nt it be hard to drill and tap it if its all stretchy?
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Unread postAuthor: thespeedycicada » Wed Aug 22, 2007 2:54 pm

http://www.clt.astate.edu/Elind/images_ ... web_15.jpg that would be nice for taking down garden spider webs without hurting the spider of course spiders are cool i just dont want them in my door way they are HUGE!![/url]We have a bunch around here.
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Unread postAuthor: SpudBlaster15 » Wed Aug 22, 2007 2:56 pm

The cured epoxy is not the consistency you are thinking of. Once cured, it is not that dissimilar to JB weld or other hard, brittle epoxies. However, it has much greater elasticity.
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Unread postAuthor: mopherman » Wed Aug 22, 2007 3:06 pm

joannaardway wrote:
I feel your pain when you're on about the pump limits. I've actually bent my pump shaft trying to get some more pressure out of it. Even at 155 lbs in weight , I have difficulty getting above 200 psi with the pump I have.


would you mind posting the gun you use at this pressure? Ive never seen any of your work and it sounds very good.
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Unread postAuthor: joannaardway » Wed Aug 22, 2007 3:23 pm

mopherman wrote:would you mind posting the gun you use at this pressure? Ive never seen any of your work and it sounds very good.

Actually, now you mention it, I realise I haven't posted any of my cannons in months.
I really should I suppose, so I'll get that sorted then.
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Unread postAuthor: coolhippy80 » Mon Aug 27, 2007 1:18 am

how do you actuate it with the schrader?
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Unread postAuthor: jackssmirkingrevenge » Mon Aug 27, 2007 1:42 am

open the schrader and it actuates, couldn't be simpler.
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