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| far_cry |
 Posted: 08/27/2008 5:22 AM Post subject: |
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Sergeant
Joined: 20 Aug 2008
Posts: 85
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gippeto
i know that air can go outside with thes high pressures from the littelest holes but liquids is not |
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| Gippeto |
| Posted: 08/27/2008 7:51 AM Post subject: |
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Colonel
Joined: 19 Jan 2008
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True enough, but I am missing your point.
Please, feel free to expand on your comment.  |
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| far_cry |
| Posted: 08/27/2008 11:26 AM Post subject: |
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Sergeant
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| Gippeto |
| Posted: 08/27/2008 12:29 PM Post subject: |
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Colonel
Joined: 19 Jan 2008
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To be totally honest, as I have not tested it past 1000psi with a gas of any sort, ... I don't know. It should not leak.
The design uses quad rings to seal the larger pieces, and now uses a teflon seal on the valve stem.
With increasing pressures, the seals actually "seal better".
I do KNOW that my new valve stem and the quad rings do not leak at 850psi. (room temp CO2) 
The highest pressurized air that is available to me currently is 4500psi. I have yet to purchase a tank though.
Otherwise, I can get nitrogen at up to 6000psi locally. A really nice alternative as it will actually increase performance without increasing pressure.
These options WILL require a regulator, as I have no intention of using more than the 3000psi originally planned for.
Helium is also being considered.
Your english is not a problem.
I will suggest that you expand on your comments so that people get a better idea of what you are trying to say. |
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| DYI |
| Posted: 08/27/2008 21:30 PM Post subject: |
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Rear Brigadier
Joined: 07 Jul 2007
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| Quote: | These options WILL require a regulator, as I have no intention of using more than the 3000psi originally planned for.
Helium is also being considered. |
No, they WILL require a way to reduce the pressure. Do you have any idea how ludicrously expensive a regulator that could output 3kpsi anything would be? I'd suggest an adaptor and needle valve, you could probably cut costs by at least 75%, maybe more, compared to a reg.
Helium would certainly cause an improvement in performance, but would you have enough pressure to make it worthwhile? I suppose that with lighter saboted rounds, it'd make all the difference.
Best of luck with this, I hope that it doesn't develop any leaks at higher pressure (although I can almost guarantee that it will leak to some appreciable extent with helium). |
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| Gippeto |
| Posted: 08/27/2008 22:17 PM Post subject: |
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Colonel
Joined: 19 Jan 2008
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I do not believe that shot to shot consistency can be achieved with a needle valve set up. This will be necessary for accuracy.
I will need a regulator.
As you mention, the cost of such a device would be "ludicrous". 
Unless I build it myself. |
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| far_cry |
| Posted: 08/28/2008 8:00 AM Post subject: |
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Sergeant
Joined: 20 Aug 2008
Posts: 85
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4500 psi hpa
where you can get high pressure like this ?? air compressor thate fill diving bottle |
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| Gippeto |
| Posted: 08/28/2008 12:59 PM Post subject: |
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Colonel
Joined: 19 Jan 2008
Posts: 705
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| Yes. |
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| dilweed |
| Posted: 10/06/2008 12:39 PM Post subject: |
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Corporal
Joined: 26 Feb 2008
Posts: 68
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| Congradulations, You are now a spudfile equivalent to a celebrity! All bow down to the allmighty Gippeto! |
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| Gippeto |
| Posted: 10/06/2008 12:53 PM Post subject: |
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Colonel
Joined: 19 Jan 2008
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| dilweed |
| Posted: 10/06/2008 13:24 PM Post subject: |
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Corporal
Joined: 26 Feb 2008
Posts: 68
244.11 Spud Bux
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| dilweed wrote: | | Congradulations, You are now a spudfile equivalent to a celebrity! All bow down to the allmighty Gippeto! |
It was a compliment! Your gun is awesome, but i'd make only one change. MAKE A WOODEN STOCK. It would look amzing. Carve, it dye, it, and you will have not only a really powerfull launcher, but also a beautifull piece of art. Dam, im so jealous. I relly wish I had the tools to make something like that. Sigh- |
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