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new 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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new idea?

Unread postAuthor: jon_89 » Mon Oct 29, 2007 10:43 pm

what if you put a burst disk after a sprinkler? would this have performance gains?
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Re: new idea?

Unread postAuthor: Novacastrian » Mon Oct 29, 2007 10:46 pm

jon_89 wrote:what if you put a burst disk after a sprinkler? would this have performance gains?


I could see gains if the burst disc was rated to within a couple of psi lower than what you are charging your gun with, however are the gains suffiencent enough to warrant the hassle of changing a disc after every shot- probably not.
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Unread postAuthor: benstern » Mon Oct 29, 2007 10:46 pm

I have done this. And while performance increase might be debatable, it makes it louder and cooler.
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Unread postAuthor: spudgunnerwryyyyy » Mon Oct 29, 2007 10:49 pm

It makes it louder and thats really it. Burst disks are use in combustions to counter act bad c:b ratios. On a pneumatic there is absolutely no reason to do it.
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Unread postAuthor: dapallox1 » Mon Oct 29, 2007 10:51 pm

Lol, I already started a thread on this about a week or two ago. I haven't gotten any chances to test out the different variables though.
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Unread postAuthor: spudgunnerwryyyyy » Mon Oct 29, 2007 10:52 pm

Well since there a consistent pressure in the chamber i see no use.
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Unread postAuthor: jon_89 » Mon Oct 29, 2007 10:55 pm

wont it act kinda of like a triggered burst disk?
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Unread postAuthor: Hubb » Mon Oct 29, 2007 10:57 pm

This will have virtually no noticeable performance gain, however, it will make it louder (if the right disc is chosen). It works great for cartridges that contain the burst disc so all you have to do is change the cartridge.
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Unread postAuthor: benstern » Mon Oct 29, 2007 10:57 pm

My motivation for doing it was to compensate for valve opening time...
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Unread postAuthor: Novacastrian » Mon Oct 29, 2007 10:57 pm

jon_89 wrote:wont it act kinda of like a triggered burst disk?


Yes, only suitable for slow opening valves though. (there would be an advantage if a ball valve was being used)
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Unread postAuthor: Hubb » Mon Oct 29, 2007 11:01 pm

benstern wrote:My motivation for doing it was to compensate for valve opening time...


Initially, that's what I thought, too, thinking that performance would be gained. However, I did not notice anything other than being louder (which is ALWAYS cool :D ). To compensate for having to change the disc, well that's were the cartridges come into play.
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Unread postAuthor: ALIHISGREAT » Tue Oct 30, 2007 2:40 am

it could work for short barrels with a slow opening valve, you need to have the valve then quite alot of dead space then the burst disc i think.
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Unread postAuthor: jackssmirkingrevenge » Tue Oct 30, 2007 2:52 am

In my book louder -> air coming out of the barrel faster -> more power.
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Unread postAuthor: Hubb » Tue Oct 30, 2007 2:59 am

jackssmirkingrevenge wrote:In my book louder -> air coming out of the barrel faster -> more power.


Agreed..but by how much. Like I said, I couldn't notice any additional power (but I didn't chrono it either). Maybe the noise was coming from the breaking of the disc.
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