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portable air tank?

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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portable air tank?

Unread postAuthor: hi » Sat Mar 31, 2007 5:27 pm

Is it possible to make a potable air tank out of pvc? I was thinking like a 3'' pvc pipe with 2 end caps and a ball valve and a quick release for a compressor. I could just fill it up and take it where ever. would it work if it was made properly? If not, what would work?
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Unread postAuthor: schmanman » Sat Mar 31, 2007 5:31 pm

it would only last for as couple shots

either a gas compressor ($600 range) or a co2 setup & regulator would be your best bet.
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Unread postAuthor: hi » Sat Mar 31, 2007 5:35 pm

ya, i have a compressor, but i dont want to haul it all the way to my friends house, and co2 is expensive. i want to make a couple tanks that are light, strong, and will give me about 10 shots with a small pnumatic. i would make maybe 3 or 4 of them, if people here think it would work.
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Unread postAuthor: jrrdw » Sat Mar 31, 2007 5:36 pm

Or you mite be able to fill 1 flat tire, good enough to get to a aircompressor. Yes it will work.
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Unread postAuthor: schmanman » Sat Mar 31, 2007 5:38 pm

how small of a pneumatic?

should work then.
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Unread postAuthor: hi » Sat Mar 31, 2007 5:48 pm

its a sprinkler valve cannon that has a 1'' chamber that is 3 feet long. how long would it hold air and at what pressure? assuming that it is a perfect solvent weld. I guess my real question is, does pvc leak at all?
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Unread postAuthor: jrrdw » Sat Mar 31, 2007 6:10 pm

Mine held aprox 15 psi for 3 days in the winter cold yet, so i say no it don't leak air unless you did something wrong.
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Unread postAuthor: hi » Sat Mar 31, 2007 6:23 pm

jrrdw wrote:Mine held aprox 15 psi for 3 days in the winter cold yet, so i say no it don't leak air unless you did something wrong.


so you are saying that if it is over 15 it wont hold? what was the original pressure, or was the original pressure 15 psi?
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Unread postAuthor: boilingleadbath » Sat Mar 31, 2007 6:51 pm

Oh, I'm sure that PVC leaks to some extent... but, unless you have an actual hole in it somewhere (gap in the solvent weld), it's not going to matter.

That said:
1) They sell portable air tanks.
2) It'd be lighter to commandeer a disposable helium tank or the like. Only downside is that, legally, it has to stay in your state.
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Unread postAuthor: subterranean » Sat Mar 31, 2007 7:14 pm

http://froogle.google.com/froogle?q=por ... e&ct=title

this works for me when i go to my friends or to the park.
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Unread postAuthor: PAspuder » Fri Apr 06, 2007 9:23 pm

i wouldnt be ok with carrying around pvc under pressure. I fill my gun and shoot it right away. If built properly though and kept to a reasonable pressure, it may work.
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Unread postAuthor: Hotwired » Fri Apr 06, 2007 9:37 pm

schmanman wrote:it would only last for as couple shots.


I'm going to disagree with this.

It all depends on how much air you're using and the pressure you have.

My signature cannon can fire off five shots from the chamber charged to 240psi. I won't elaborate on how because I might be building something with a more developed system that will be able to do ~8 from a similar volume chamber charged to 300psi.

I'm not talking about the last few shots falling out of the barrel either, I'm meaning 5mm deep impressions in planks at 20m with solid cylindrical slugs.

If you have some kind of regulation system to only feed out so much air per shot it should work.
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Unread postAuthor: hi » Fri Apr 06, 2007 9:49 pm

I thought that qev are only rated at 125 or something. Maybe i should buy some copper on e-bay and use that, it would hold better than pvc.
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Unread postAuthor: Hotwired » Sat Apr 07, 2007 5:15 am

The one I've got can do 300 according to a battle robot site which sells them.

Just remember copper is more expensive than pvc.
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Last edited by Hotwired on Sat Apr 07, 2007 8:07 am, edited 1 time in total.
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Unread postAuthor: jrrdw » Sat Apr 07, 2007 5:46 am

15 psi was the pressure, thats where it stops leaking, lol. I'm not kidding. If i want a good shot, i have to put 10 extra psi in it, you know charge to 60, shoots at 50. If your quick.
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