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Triggered burst disk idea

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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Good Idea?

Yeah! Might try it sometime....
0
No votes
Sounds good.
2
67%
BOO! IT STINKS!
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Total votes : 3
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Triggered burst disk idea

Unread postAuthor: Spedy » Fri Jul 27, 2007 5:27 pm

I'm only posting this because I haven't seen it anywhere else. Maybe I just haven't searched enough..

Well, I was thinking of using some kind of pin that goes through a hole in the barrel just before the burst disk union. I was thinking it could be sealed with JB weld/epoxy and while it was drying you would move the pin back and forth to make it dry with a groove for the pin to move back-n-forth. Maybe I'm just insane to thing that would seal. oh well. heres what I'm talking about:
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Unread postAuthor: noname » Fri Jul 27, 2007 8:18 pm

Have you made a burst disc gun? A good burst disc, one that can hold at least 90 psi, will be hard to puncture without violently stabbing it. Poking at it might weaken it enough to burst eventually, but it's really not worth it.
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Unread postAuthor: VH_man » Fri Jul 27, 2007 8:24 pm

what if you spring-loaded it?

im sure if you jabbed it with 50 pounds with a nail it would pop....
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Unread postAuthor: noname » Fri Jul 27, 2007 8:34 pm

Why not connect a blowgun with hose leading fronm the chamber to the inside of the barrel? The blowgun could have a small barrel attached with a nail in it. To shoot, open the blowgun. It would launch the nail down at the disc.
Much more fun! And loads more work... :?
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Unread postAuthor: iPaintball » Fri Jul 27, 2007 8:41 pm

Ha, thats a first! A pnuematic cannon triggered by another!
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Unread postAuthor: noname » Fri Jul 27, 2007 8:49 pm

No, because it would still be the first. The blowgun would have a hose connected to the same chamber as the burst disc. It would be a pilot valve, in a way.
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Unread postAuthor: iPaintball » Fri Jul 27, 2007 8:51 pm

Oh, I just meant that the "pilot valve" is actually a nail gun. But if they share the same chamber than I guess it doesn't count.
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Unread postAuthor: spudbud101 » Fri Jul 27, 2007 10:47 pm

Why is this in the How-To forum? Should it not be in the Pneumatic Discussion?
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Unread postAuthor: us sniper » Fri Jul 27, 2007 10:53 pm

This is what the precharged 20 ounce co2 bottles use. It has a cap that punctures the thin metal cap as you screw it in. On the bottles this causes the metal cap to only have a small punture wound. I do not know what would have if the peice of metal was not welded in place, which is what you would most likely be using.
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Unread postAuthor: paaiyan » Fri Jul 27, 2007 11:13 pm

Why not just have a burst disk that ruptures at the proper pressure? I mean, if you're going to set all this crap up you might as well just mod a sprinkler valve.
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Unread postAuthor: Modderxtrordanare » Sat Jul 28, 2007 12:57 am

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Unread postAuthor: sgort87 » Sat Jul 28, 2007 3:05 am

Heheh, i see you got to it first. Good catch.

By the way, I'm making a second prototype sometime soon.
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Unread postAuthor: dongfang » Sat Jul 28, 2007 5:01 pm

Hi,

Hehe, make a burst disk mortar, with something on the back end of the shells to rupture the diaphragm? Could be cool :lol:

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Unread postAuthor: frankrede » Sat Jul 28, 2007 5:17 pm

Your projectile would have to fall down the barrel fast and heavy enough to puncture the disk.
Maybe a loose fitting lead slug with a nail in the bottom would work
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Unread postAuthor: Modderxtrordanare » Sun Jul 29, 2007 12:08 am

sgort87 wrote:Heheh, i see you got to it first. Good catch.

By the way, I'm making a second prototype sometime soon.


Can't wait. :o
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