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Built a pneumatic cannon? Then post it here! This section is for completed, finished cannons that you have built. Please include pictures and information.
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Unread postAuthor: VH_man » Mon Aug 13, 2007 6:03 pm

WOWWWWWW. try tank armor as your primary target.

keep bringing up the pressure untill.... alas, golf ball through tank armor. then take it to the US millitary and say.... umm............ my homebuild golfball cannon just owned your tank........

kidding. i dont think anything pneumatic is going to penetrate tank armor anytime soon.......

anyway, that owns. i hope you can find a way to take it above 300 PSI, i want to see this thing at like 500.......
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Unread postAuthor: spud yeti » Tue Aug 14, 2007 9:34 am

kidding. i dont think anything pneumatic is going to penetrate tank armor anytime soon.......


A 1200PSI cannon shooting reinforced darts could possibly :?

take it above 300 PSI, i want to see this thing at like 500.......


I agree, although that would be insane :shock:

Has your compressor arrived yet?
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Unread postAuthor: DYI » Tue Aug 14, 2007 9:53 am

Quote:
kidding. i dont think anything pneumatic is going to penetrate tank armor anytime soon.......


A 1200PSI cannon shooting reinforced darts could possibly



Nope. Even with 1200psi steam in a 3600 ci chamber, with a 10 pound projectile, a burst disk valve, and a barrel 100 feet long, you wouldn't get near the kind of muzzle energy and velocity necessary to penetrate tank armor with a finned and saboted DU or tungsten round. 365 000 ft/lbs would be interesting though... but I would agree that no pneumatic gun will be achieving that kind of power any time soon.

I look forward to seeing damage pics from this gun at 300 psi.
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Unread postAuthor: Fnord » Tue Aug 14, 2007 9:59 am

Nope. Even with 1200psi steam in a 3600 ci chamber, with a 10 pound projectile, a burst disk valve, and a barrel 100 feet long, you wouldn't get near the kind of muzzle energy and velocity necessary to penetrate tank armor with a finned and saboted DU or tungsten round. 365 000 ft/lbs would be interesting though... but I would agree that no pneumatic gun will be achieving that kind of power any time soon.


...But it could blow their treads off ;)

_______________

Keep in mind there is a difference between a fire extinguisher's RATED pressure and TESTED pressure. Most of the tanks I've seen only list a test pressure.

Edit: Some how I missed the "Air tank" part of your post. Sorry, you should be fine. Good looking gun too.
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Unread postAuthor: DYI » Tue Aug 14, 2007 10:06 am

Most FEs that I have seen are tested to 585 psi, which is far more than their working pressure of around 195 psi. This doesn't mean that they are rated to 585 psi, as they could have burst at 590. He should be fine at 300, although this is higher than the rated working pressure. I would assume that a fire extinguisher's working pressure would be about 1/3 of its test pressure which works out to (probably not coincidentally) 195 psi, which is the pressure that they are filled to.
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Unread postAuthor: potatoflinger » Tue Aug 14, 2007 10:12 am

Is it an FE? I thought it was an oxygen tank that firefighters carry around on their backs.
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Unread postAuthor: spud yeti » Tue Aug 14, 2007 10:21 am

No, I think its a FE, because he said "firemans tool" or something to that extent. I doubt any fireman would want to carry that on his back anyways :wink:
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Unread postAuthor: potatoflinger » Tue Aug 14, 2007 11:25 am

spud yeti wrote:No, I think its a FE, because he said "firemans tool" or something to that extent. I doubt any fireman would want to carry that on his back anyways :wink:

Actually, I just re-read the description, and he said it was rated at 2216 psi, which is way more than a fire extinguisher, also If I were a firefighter, I would want to carry an oxygen tank on my back, it would save my life.
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Unread postAuthor: spud yeti » Tue Aug 14, 2007 11:55 am

would want to carry an oxygen tank on my back

yeah, but not that size! :roll:
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Unread postAuthor: paaiyan » Tue Aug 14, 2007 12:38 pm

That's nice, i like it a lot. About how much does it weigh?
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Unread postAuthor: potatoflinger » Tue Aug 14, 2007 12:55 pm

spud yeti wrote:
would want to carry an oxygen tank on my back

yeah, but not that size! :roll:

Well, firefighters have to carry enough oxygen for two people (In case they rescue someone).
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Unread postAuthor: frankrede » Tue Aug 14, 2007 3:35 pm

spud yeti wrote:No, I think its a FE, because he said "firemans tool" or something to that extent. I doubt any fireman would want to carry that on his back anyways :wink:
Have you ever seen a fully dressed fireman?
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Unread postAuthor: randompkguy » Tue Aug 14, 2007 10:11 pm

I'm positive that that's an oxygen tank...cause I weld, and oxygen tanks (on torch rigs) are pressurized to around 2000 psi so that the gas liquefies. Also fire extinguishers mainly use co2 which develops 800 some psi at room temp, not 2216....
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Unread postAuthor: frankrede » Wed Aug 15, 2007 12:30 am

Its a oxygen tank.
Don't listen to them, I am interested in a career as a firefighter, and I know my fair share of information.
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Unread postAuthor: spud yeti » Wed Aug 15, 2007 12:39 am

Its a oxygen tank.

No its not, its an oxygen tank. :D
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