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antique airgun

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.
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Unread postAuthor: pizlo » Sat Dec 29, 2007 12:55 pm

WOW, thats really all I can say heres some history about the development in several cultures.
http://en.wikipedia.org/wiki/Air_gun
I'm surprised so many cultures thought of this idea, also they were used on the Lewis and Clarke expedition.
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Unread postAuthor: Eddbot » Sat Dec 29, 2007 9:31 pm

jackssmirkingrevenge wrote:
carter wrote:what would the pressure be in the reservior?


In the region of 750-1000 psi


how could they get it up so high? i can see how they could come up with the technology for the gun, but what would they use to get those kinds of pressures

edit: w00t!!! 100th post!!! yay new smilies!! :evil4: :happy5: :male: :occasion8: :sign11: :toothy2: ok, i'm done... :D
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Last edited by Eddbot on Sat Dec 29, 2007 9:38 pm, edited 1 time in total.
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Unread postAuthor: MrCrowley » Sat Dec 29, 2007 9:33 pm

Water + heat = steam maybe?

That'd be my guess as copper is highly conductive it'd be perfect.
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Unread postAuthor: Eddbot » Sat Dec 29, 2007 9:43 pm

jackssmirkingrevenge wrote:The air reservoir was good for 30 shots, and the soldiers carried 3 spare ones, more than enough ammunition for a typical battle at the time.


that's what i thought but how would they carry the extras around if the reservoirs are hot enough to have 750 to 1000 psi of steam
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Unread postAuthor: sandman » Sat Dec 29, 2007 9:54 pm

i thought that he meant steam drove like a hydrolic pump that compressed the air
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Unread postAuthor: Novacastrian » Sat Dec 29, 2007 10:58 pm

MrCrowley wrote:Water + heat = steam maybe?

That'd be my guess as copper is highly conductive it'd be perfect.


"Oh Crap, we are under fire boys, Johnson get the fire wood, Smith kindling, and you Mr Thirsty, what did you do with our water!!"

"Errrr Matches anyone..........."
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Unread postAuthor: Hawkeye » Sat Dec 29, 2007 11:37 pm

A simple stirrup pump reaches those pressures. Do you really think they went hunting and heated up the reservoir continuously?
A machine was developed that worked like a compressor to fill reservoirs during battles.
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Unread postAuthor: MrCrowley » Sun Dec 30, 2007 12:06 am

I was thinking of a compressor or pump but I wondered how they would get it to seal. As I haven't read the thread I didn't know when these were used and what resources they had available.

What's wrong with a normal gun for battle? Seriosuly though, why go to all this trouble when you could use a perfectly normal gun capable of similar performance?


Okay Just saw the previous page, noticed they were repeating rifles and they have a pump, maybe I should read before posting, I take back my comments :P
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Unread postAuthor: jackssmirkingrevenge » Sun Dec 30, 2007 6:18 am

Hawkeye wrote:A simple stirrup pump reaches those pressures.


That's exactly how they did it - modern air rifle stirrup pumps go past 3,000 psi easily. I believe the Girandoni's chamber took around 4,500 strokes to fill, which is why they carried pre-charged chambers to battle.
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Unread postAuthor: MrCrowley » Sun Dec 30, 2007 6:23 am

Novacastrian wrote:
MrCrowley wrote:Water + heat = steam maybe?

That'd be my guess as copper is highly conductive it'd be perfect.


"Oh Crap, we are under fire boys, Johnson get the fire wood, Smith kindling, and you Mr Thirsty, what did you do with our water!!"

"Errrr Matches anyone..........."


"Oh Crap, we're under fire boys, Johnson get the copper chambers, Smith stirrup pump, and you Mr Small Balls, what did you do with our steroids!!"

:D
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Unread postAuthor: jackssmirkingrevenge » Sun Dec 30, 2007 6:29 am

MrCrowley wrote:you Mr Small Balls, what did you do with our steroids!!"


Reminded me of a joke, what do you call a dog with no tongue :?: :roll:
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Unread postAuthor: MrCrowley » Sun Dec 30, 2007 6:35 am

jackssmirkingrevenge wrote:
MrCrowley wrote:you Mr Small Balls, what did you do with our steroids!!"


Reminded me of a joke, what do you call a dog with no tongue :?: :roll:


What do you call a dog with no tongue?
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Unread postAuthor: jackssmirkingrevenge » Sun Dec 30, 2007 6:36 am

smelly balls :)
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Unread postAuthor: ALIHISGREAT » Sun Dec 30, 2007 6:39 am

jackssmirkingrevenge wrote:smelly balls :)


:lol:
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Unread postAuthor: MrCrowley » Sun Dec 30, 2007 6:41 am

jackssmirkingrevenge wrote:smelly balls :)


*facepalm*
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