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What would you suggest I do with these 9 ounce tanks?

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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What would you suggest I do with these 9 ounce tanks?

Unread postAuthor: scottcrete » Sat Mar 29, 2008 2:32 pm

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I got these two 9 ounce tanks.. and am looking for inspiration on what to use them for.. any ideas? how much will they power a pneumatic? what do you think i should build that these will work nice with.. or are they just to small and would be a waste of time?

Let me know your thoughts.
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Unread postAuthor: ammosmoke » Sat Mar 29, 2008 2:35 pm

I would just shoot them. Lol, low weight chromoly? Chromo is heavy!
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Unread postAuthor: bigbob12345 » Sat Mar 29, 2008 2:43 pm

I would use them for an extremely powerful one shot pnuematic.
just fing a way to open them fully fast and hook it up to a really long barrel, slap on some ear protection and press the record button on your cam and finnally shoot.

but i guess you could make a hybrid out of em
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Unread postAuthor: DYI » Sat Mar 29, 2008 2:50 pm

Chromium-molybdenum steel alloy isn't exactly lightweight compared to aluminum, but those tanks should be pretty light anyway, because of their size.

Just get the proper fittings welded on by a competent welder, and you have yourself a ready made hybrid chamber. Or, if you really trust the welder, you could make the chamber for a high pressure pneumatic from them. I wonder how long it would take to pressurise one to 1800 psi with a hand pump...
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Unread postAuthor: MrCrowley » Sat Mar 29, 2008 2:58 pm

Maybe something like this:
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Except you wont have to get yours welded like I did.
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Unread postAuthor: elitesniper » Sat Mar 29, 2008 3:48 pm

I say hybrid, if your a good welder :)
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Unread postAuthor: MrCrowley » Sat Mar 29, 2008 3:58 pm

For a pneumatic you could...

Join the tanks together with two 90* elbows that connect to the bottom ports of a tee fitting. Have the tee fitting with the top port verticle.
Slap another tee ontop of this one so you'd have two ports horizontal.

Then make it into a high pressure piston valve using hundreds of PSI :)

If you're confused, just think of a normal barrel sealing piston with over-under configuration but with dual chambers.
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Unread postAuthor: POLAND_SPUD » Sat Mar 29, 2008 4:09 pm

If I were you I would use them as a chamber on a high pressure pneumatic.. get youself a 3/4" QEV and build it all steel...

forget about hand pumps - fridge compressors are good up to 35 Bar (500 psi) and that is even more than you need
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Unread postAuthor: SpeedyFerrite » Sat Mar 29, 2008 4:10 pm

I'd send them to my place.. free of cost.
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Unread postAuthor: pizlo » Sat Mar 29, 2008 4:13 pm

Well, first off what is your air source. What diameter are the threads?
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Unread postAuthor: DYI » Sat Mar 29, 2008 4:32 pm

When I said high pressure I meant something along the lines of the rating of the tanks - 1,800psi or so. 35 bar just seems kind of benign to me now, and it certainly won't be "more than you need" in a gun this small.

Check out my MBDC. It's rather weak at 500 psi with only 615ft/lbs of muzzle energy at 670 fps. Hardly any kick to speak of :(
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Unread postAuthor: bigbob12345 » Sat Mar 29, 2008 5:08 pm

It's rather weak at 500 psi with only 615ft/lbs of muzzle energy at 670 fps


probably to 95% of the people on this website 615ft lbs is very impressive
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Unread postAuthor: DYI » Sat Mar 29, 2008 5:19 pm

I am designing a handheld that will have worthwhile power, but it'll likely be years before I finish it.

615 ft/lbs looked impressive on GGDT, but it lost its lustre when I tested it against some targets that the SCTBDC can punch 12" holes in and it barely made it through them. The problem for me is that I look for several thousands of ft/lbs from any new launcher, and it's rather difficult to squeeze that much power out of handheld sized gas gun that's easy to load and use (unless you're Larda of course :roll: ).
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Unread postAuthor: scottcrete » Sat Mar 29, 2008 5:59 pm

so how would i refill them,,, if they were welded on?
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Unread postAuthor: POLAND_SPUD » Sat Mar 29, 2008 6:03 pm

@DYI vast majority of people on this site have never used more than 300 psi.. so 35 bar is high pressure for most people on this site... kinetic energy isn't everything you know
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