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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: dapallox1 » Mon Oct 29, 2007 10:48 pm

I'm using a 1 1/4" coupling as the piston, and a piece of foam stuff from some case. The foam is air tight, but there is a hole in it in the center... so air is leaking from underneath the foam through the hole. I just need a different.. sealing plate? I guess you could call it that. Any ideas? Something cheap and easy to find. I really wanting this working by Halloween.
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Current Project: 4" Tee Piston Valve
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Unread postAuthor: spudgunnerwryyyyy » Mon Oct 29, 2007 10:51 pm

Use neoprene rubber or bike inertube. Half filling the coupling with epoxy will also help. After you half fill it with epoxy bolt some neoprene rubber one side and it will work perfectly.
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Unread postAuthor: dapallox1 » Tue Oct 30, 2007 7:28 am

Is neoprene rubber the same thing as bike inertube? Because I have plenty of bike inertube! :D
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Current Project: 4" Tee Piston Valve
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Unread postAuthor: hyldgaard » Tue Oct 30, 2007 8:37 am

dapallox1 wrote:Is neoprene rubber the same thing as bike inertube? Because I have plenty of bike inertube! :D

no its not the same, but bike innertube is a very common sealing face with good reason, you can use that without any problems :)
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Unread postAuthor: octane89 » Sun Nov 04, 2007 10:56 am

This is nice-Now if I can finally find 4" pressure pvc fittings for my 3" valve. Props to you.
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Unread postAuthor: pneumaNINJA » Thu Nov 08, 2007 4:40 pm

beautiful cannon.. very clean construction too. Makes me proud to work with pneumatics
cans are always nice to make a mess with as well ahaha.

and this is off topic, i know, but what size are your gauges?
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Unread postAuthor: Brian the brain » Sat Nov 10, 2007 7:04 am

Cannons like this kinda have the tendency to turn you into a redneck anyway hahaha
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Gun Freak wrote:
Oh my friggin god stop being so awesome, that thing is pure kick ass. Most innovative and creative pneumatic that the files have ever come by!

Can't ask for a better compliment!!
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Unread postAuthor: bikingpro911 » Fri Sep 05, 2008 10:22 pm

wow thats one reed neck u have there LMFAO!
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Unread postAuthor: nivekatoz » Mon Sep 15, 2008 11:19 am

You can buy rubber roof membrain or pond liner at any home center. Menards, Fleetfarm, etc..You have to buy it per foot. Its cheap and works good as a seal or gasget.
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