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| LGM |
 Posted: 02/17/2007 21:24 PM Post subject: Hydrogen |
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Captain
Joined: 22 Jan 2007
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| Would a 2x shot with hydrogen shatter sch 40 2" steel pipe? |
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| noname |
| Posted: 02/17/2007 23:23 PM Post subject: |
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Mr Vortex
Joined: 10 Apr 2006
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| In simple terms, no, but I REALLY wouldn't advise it. There's too many safety hazards. |
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| frankrede |
| Posted: 02/18/2007 0:38 AM Post subject: |
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Sangheili
Joined: 20 Jul 2006
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| I really don't know but I would feel more comfortable with sch 80 higher |
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| BC Pneumatics |
| Posted: 02/18/2007 10:13 AM Post subject: |
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Donating Moderator
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In my opinion, it is very possible that your chamber would fragment, especially if it was long. (flamefront acceleration is not always your friend.)
Also, what is meant by 'a 2x mix' ?
This tells us absolutely nothing. In hybrid terminology, it refers to the number of atmospheres of pressure inside the chamber. If you really meant "a stoichiometric mix of H2 & O2 pressurized to 2atm" then you are sure to run into some serious trouble.
Last edited by BC Pneumatics on 02/18/2007 10:28 AM; edited 1 time in total |
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| LGM |
| Posted: 02/18/2007 10:39 AM Post subject: |
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Captain
Joined: 22 Jan 2007
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I mean a 14.7 psi mix of hydrogen at aproximatelly its ideal percentage in air.
I would only use pure H2 O2 in a very small, very thick pipe. |
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| Velocity |
| Posted: 02/18/2007 10:42 AM Post subject: |
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Brigadier General
Joined: 07 Feb 2006
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| Doesn't hydrogen corrode some type of metal pipe, maybe steel or aluminum? |
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| BC Pneumatics |
| Posted: 02/18/2007 10:43 AM Post subject: |
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Donating Moderator
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| LGM wrote: | I mean a 14.7 psi mix of hydrogen at aproximatelly its ideal percentage in air.
I would only use pure H2 O2 in a very small, very thick pipe. |
This doesn't make sense...
You also might want to note that a stoichiometric mix of H2 and O2 can reach a peak velocity of 4,000 meters/second right after DDT occurs. (The main point is- will you have a large enough chamber for that to happen.) |
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| LGM |
| Posted: 02/18/2007 10:46 AM Post subject: |
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Captain
Joined: 22 Jan 2007
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| You are refering to embrittlement. In high pressure applications, hydrogen will react with the carbon in carbon steel pipe to create methane, weakening the pipe. I am not worried about this happening. I would have it at low pressure for short periods of time. And if I did fire it with hydrogen, I would only do it a couple times in case of pipe weakening from the shock. |
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| BC Pneumatics |
| Posted: 02/18/2007 10:54 AM Post subject: |
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Donating Moderator
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| Two inches isn't a 'very small pipe' |
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| LGM |
| Posted: 02/18/2007 11:01 AM Post subject: |
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Captain
Joined: 22 Jan 2007
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| I know, I will not be adding oxy to this, just air. I said if I would, then I would use very small pipe. |
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| BC Pneumatics |
| Posted: 02/18/2007 12:46 PM Post subject: |
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It would have been nice to include everything you planed to do, in your first post. You don't want a '2x mix of H2 and O2", 2x mix of H2, O2, CO2, CO, N2, and a host of other things in there.
I still don't know how far I would trust a 'steel chamber' though. It would actually depend a lot on the ammo. |
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| Dumbascii |
| Posted: 05/17/2007 20:37 PM Post subject: Re: Hydrogen |
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Specialist
Joined: 29 Nov 2006
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| LGM wrote: | | Would a 2x shot with hydrogen shatter sch 40 2" steel pipe? |
If you are still watching this topic - I am interested in how you would obtain, then carry / meter / deliver the hydrogen. |
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| BC Pneumatics |
| Posted: 05/18/2007 8:16 AM Post subject: |
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Donating Moderator
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| While this should really be a separate topic, using a water small pump to displace hydrogen from a bottle is a simple and effective method that I like to use. |
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| Dumbascii |
| Posted: 05/18/2007 9:45 AM Post subject: |
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Specialist
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| BC Pneumatics wrote: | | While this should really be a separate topic, using a water small pump to displace hydrogen from a bottle is a simple and effective method that I like to use. |
I was thinking in terms of a pressurized mass supply rather than small amounts made by electrolysis in a two-litre bottle. Though if you could make large amounts on-site at the firing range . . . Would take a lot of power. |
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| dongfang |
| Posted: 05/18/2007 10:57 AM Post subject: |
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Lieutenant Colonel
Joined: 27 Aug 2006
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Hi,
Anyway why would anyone want to use hydrogen?
I did the figures once; it is not a very good potato gun fuel. Reason: Extremely high energy density per mass unit, but also extremely few mass units per volume unit. Result: Only moderate size o' bang in a chamber. Smaller than for many other fuels.
Soren |
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