150,000psi??

[pat123]

I found this website looking for valves for potato guns but I was wondering how they get the pressure of whatever they are using it on up to that pressure? It would be awesome to make a 150,000psi cannon I have no idea what kind of pipe you would use or how to get it that high.http://www.highpressure.com/valves_fitt ... &section=4

[Hotwired]

Looks like a needle valve for hydraulic pressure.

No gas would be a gas at 150,000psi (without some ridiculous conditions) so it's a no-go.

[pizlo]

Also you would be limited by the expansion rate of air.

[mark.f]

Such equipment would definitely be hydraulic. I think I remember calculating that blackpowder burns around 150 KPSI, (wasn't that exact number).

[DYI]

At room temperature, hydrogen is the only thing that would still be gaseous at that pressure. Even helium would be liquified. I don't know of any hydraulic or pneumatic systems that operate anywhere near that kind of pressure. Even light gas guns and tank cannons don't usually operate over 100kpsi.

[cwazy1]

well then with that said can we try at 99kpsi??

[DYI]

Well, you try and build a homemade LGG, and go right ahead. I'm sure we'll hear about it on the news...

[bigbob12345]

I dont think there is any way of getting to that pressure but if you did and fired it would deafen everybody within a mile of the point you fired it.

[windshrike]

Not to mention that at 150 kpsi you'd have several kilos of gas being vented, so the recoil would be, to say the least, devastating. Bye-bye rotator cuff.

[DYI]

Well, those numbers depend on the size of chamber you used, and whether you were idiotic enough to fire it handheld. With a small enough chamber, using 150kpsi hydrogen, your performance:size ratio would be higher than any firearm.

Unfortunately, this doesn't change the problem that the valve system on a handheld 150kpsi hydrogen pneumatic would cost more than most people earn in a year.

[noob of noobs]

So just use it on a high powered pneumatic! You don't have to use it at 150kpsi, do you? If not, you could try to make a gun on unregulated nitrogen or something. I mean, it's a pretty much fail safe valve, so what's the problem?

[Hotwired]

The flow is crap thats what

[carter]

i no gun powder burns at roughly 50000psi. would it be used for steam?

[noob of noobs]

The flow is crap thats what

Oh... Then screw it...

[CpTn_lAw]

what do you mean black powder burns at 50,000 psi? like in "in a closed chamber it produces 50,000 psi max?" or that it self ignites at 50,000psi?