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Built a combustion 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: noname » Thu Mar 29, 2007 6:55 pm

The topic's been debated here, several times. Look around some more, it's not that hard to find stuff.
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Unread postAuthor: Seakros » Thu Mar 29, 2007 6:55 pm

Well i was going to build it PVC, but there is no PVC watsoever at my Reno Depot in Montreal... SO thats why it took ABS....

Just to verify.... UP to what PSI do u guys think i am safe? Its not cellular core. And as i have said i have already pumped 32 PSI in it.
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Unread postAuthor: noname » Thu Mar 29, 2007 6:59 pm

Get a long hose, attach it to the gun, attach the other end to a schrader valve, hide behind a tree, and pump until it explodes. Then you know the limit, stay about 50 psi below that.
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Unread postAuthor: Seakros » Thu Mar 29, 2007 7:03 pm

k thx, i wont do the experiment, lol........ but i will stay at about 45 psi for my shots...
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Unread postAuthor: tater36 » Fri Apr 06, 2007 6:29 pm

would a 4 ft barrel of 2in and a 1.5 ft chamber of 3 in make a nice ratio and good muzzle velocities i suck at ratios :D ?
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Unread postAuthor: Technician1002 » Wed Apr 15, 2009 12:35 am

keep_it_real wrote:You don't even need to see the comparison. ABS can't hold much pressure for long periods of time. If you value your eardrums, I would consider changing to pvc for pneumatic.


Youtube is full of videos like this one;
[youtube]http://www.youtube.com/watch?v=AQo81nqx-W8[/youtube]

Try to find one for ABS. There are a few, but they do tend to split out, but rarely.

Hearing protection is a good idea for all air cannons.

I do recommend properly pressure testing any air cannon regardless of the construction materials. I pressure test annualy and work well under the test pressure.
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Unread postAuthor: dart guy » Sun Jun 16, 2013 8:48 pm

i made the same thing just short more or less
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