Login    Register
User Information
Username:
Password:
We are a free and open
community, all are welcome.
Click here to Register
Sponsored
Who is online

In total there are 78 users online :: 4 registered, 0 hidden and 74 guests


Most users ever online was 155 on Mon Aug 15, 2016 1:40 am

Registered users: Bing [Bot], Google [Bot], Google Adsense [Bot], Yahoo [Bot] based on users active over the past 5 minutes

The Team
Administrators
Global Moderators
global_moderators.png CS

150,000psi??

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.
Sponsored 
  • Author
    Message

150,000psi??

Unread postAuthor: pat123 » Sat Dec 29, 2007 12:45 pm

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 :twisted: I have no idea what kind of pipe you would use or how to get it that high.http://www.highpressure.com/valves_fittings.asp?ID=42&ptype=15v&section=4
  • 0

User avatar
pat123
Colonel
Colonel
 
Posts: 514
Joined: Sat Dec 23, 2006 10:08 pm
Location: S.C.
Reputation: 0

Unread postAuthor: Hotwired » Sat Dec 29, 2007 12:47 pm

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.
  • 0

User avatar
Hotwired
Lieutenant General
Lieutenant General
 
Posts: 2599
Joined: Fri Oct 13, 2006 5:51 am
Location: UK
Reputation: 0

Unread postAuthor: pizlo » Sat Dec 29, 2007 12:56 pm

Also you would be limited by the expansion rate of air.
  • 0

User avatar
pizlo
Brigadier General
Brigadier General
 
Posts: 783
Joined: Fri Dec 22, 2006 7:27 pm
Reputation: 0

Unread postAuthor: mark.f » Sat Dec 29, 2007 1:01 pm

Such equipment would definitely be hydraulic. I think I remember calculating that blackpowder burns around 150 KPSI, (wasn't that exact number).
  • 0

User avatar
mark.f
Donating Member
Donating Member
 
Posts: 3464
Joined: Sat May 06, 2006 11:18 am
Country: United States (us)
Reputation: 21

Unread postAuthor: DYI » Sat Dec 29, 2007 1:43 pm

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.
  • 0

Spudfiles' resident expert on all things that sail through the air at improbable speeds, trailing an incandescent wake of ionized air, dissociated polymers and metal oxides.
User avatar
DYI
Lieutenant General
Lieutenant General
 
Posts: 2861
Joined: Sat Jul 07, 2007 8:18 pm
Location: The People's Republic of Canuckistan
Country: Turks and Caicos Islands (tc)
Reputation: 9

Unread postAuthor: cwazy1 » Sat Dec 29, 2007 1:47 pm

well then with that said can we try at 99kpsi?? :wink:
  • 0

I bought a signature twice because I was an idiot. 600 bux =(

cwazy1
Captain
Captain
 
Posts: 305
Joined: Mon Sep 10, 2007 8:31 pm
Reputation: 0

Unread postAuthor: DYI » Sat Dec 29, 2007 1:58 pm

Well, you try and build a homemade LGG, and go right ahead. I'm sure we'll hear about it on the news...
  • 0

Spudfiles' resident expert on all things that sail through the air at improbable speeds, trailing an incandescent wake of ionized air, dissociated polymers and metal oxides.
User avatar
DYI
Lieutenant General
Lieutenant General
 
Posts: 2861
Joined: Sat Jul 07, 2007 8:18 pm
Location: The People's Republic of Canuckistan
Country: Turks and Caicos Islands (tc)
Reputation: 9

Sponsored

Sponsor
 


Unread postAuthor: bigbob12345 » Sat Dec 29, 2007 3:02 pm

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.
  • 0

User avatar
bigbob12345
Major General
Major General
 
Posts: 1516
Joined: Sat Dec 01, 2007 9:13 am
Location: Mercer Island,Washington
Reputation: 0

Unread postAuthor: windshrike » Sat Dec 29, 2007 3:29 pm

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.
  • 0

User avatar
windshrike
Sergeant Major
Sergeant Major
 
Posts: 178
Joined: Thu Jun 28, 2007 4:23 pm
Reputation: 0

Unread postAuthor: DYI » Sat Dec 29, 2007 4:05 pm

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.
  • 0

Spudfiles' resident expert on all things that sail through the air at improbable speeds, trailing an incandescent wake of ionized air, dissociated polymers and metal oxides.
User avatar
DYI
Lieutenant General
Lieutenant General
 
Posts: 2861
Joined: Sat Jul 07, 2007 8:18 pm
Location: The People's Republic of Canuckistan
Country: Turks and Caicos Islands (tc)
Reputation: 9

Unread postAuthor: noob of noobs » Sat Dec 29, 2007 5:45 pm

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?
  • 0

User avatar
noob of noobs
Captain
Captain
 
Posts: 320
Joined: Tue Jun 12, 2007 8:04 pm
Location: Illinois, Skokie
Reputation: 0

Unread postAuthor: Hotwired » Sat Dec 29, 2007 5:47 pm

The flow is crap thats what :lol:
  • 0

User avatar
Hotwired
Lieutenant General
Lieutenant General
 
Posts: 2599
Joined: Fri Oct 13, 2006 5:51 am
Location: UK
Reputation: 0

Unread postAuthor: carter » Sat Dec 29, 2007 5:51 pm

i no gun powder burns at roughly 50000psi. would it be used for steam?
  • 0

At my lemonade stand I used to give the first glass away free and charge five dollars for the second glass. The refill contained the antidote

carter
Corporal
Corporal
 
Posts: 77
Joined: Mon Mar 05, 2007 2:47 am
Reputation: 0

Unread postAuthor: noob of noobs » Sat Dec 29, 2007 5:55 pm

Hotwired wrote:The flow is crap thats what :lol:


Oh... Then screw it...
  • 0

User avatar
noob of noobs
Captain
Captain
 
Posts: 320
Joined: Tue Jun 12, 2007 8:04 pm
Location: Illinois, Skokie
Reputation: 0

Unread postAuthor: CpTn_lAw » Sat Dec 29, 2007 6:30 pm

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?
  • 0

"J'mets mes pieds où j'veux, et c'est souvent dans la gueule."
User avatar
CpTn_lAw
Brigadier General
Brigadier General
 
Posts: 987
Joined: Sun Sep 11, 2005 9:10 am
Location: France
Reputation: 0

Next

Return to Pneumatic Cannon Discussion

Who is online

Registered users: Bing [Bot], Google [Bot], Google Adsense [Bot], Yahoo [Bot]

Reputation System ©'