Posted: Sat Dec 29, 2007 6:30 pm
My god, imagine a 150,000psi gun with a burst disc made from 1" titanium sheeting, I'm sure that you could fire marbles at near the speed of light. lol 
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Posted: Sat Dec 29, 2007 6:31 pm
Gunpowder can burn at a lot more than 50kpsi. Tank cannons sometimes generate 85kpsi, so I'd be more inclined to believe Mark's calculations. And you certainly don't need 150kpsi fittings for unregged nitrogen. It doesn't usually run anywhere over 2.6kpsi.
Posted: Sat Dec 29, 2007 6:40 pm
okay thanks DYI for the enlightment 
Posted: Sat Dec 29, 2007 6:45 pm
the only thing i can see these being useful for is a super high mix hybrid where you could use a shutoff valve to separate the chamber from the more delicate fuel and air injection parts although ignition could be a problem...
Posted: Sat Dec 29, 2007 8:07 pm
So just for the fun of it i used this pressure for a burst disk bb gun in ggdt and got 140461 fps and 135123 ft/ibs of muzzle energy with air! 
Posted: Sat Dec 29, 2007 8:09 pm
i was just using smaller caliber rifle shots, theres a chart in my mates dads shed with estimated pressures. thats where i got this info from.
Posted: Sat Dec 29, 2007 8:39 pm
ROFL, thats Mach 126jon_89 wrote:So just for the fun of it i used this pressure for a burst disk bb gun in ggdt and got 140461 fps
that made my lol
Posted: Sat Dec 29, 2007 10:08 pm
That was for a .5 inch by 8 inch chamber and a .25 inch 16 inch barrel.