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From: Peter Arundel <pureteenlard-at-hotmail.com>
Subject: RE: psi [TANKS]
Date: Mon, 1 Oct 2007 22:01:57 +0100
Reply-To: tanks-at-rctankcombat.com

Yes, but CO2 and compressed air are very different animals. CO2 when compressed turns to liquid and retains a fairly constant gas pressure above the liquid level. As you use gas, the pressure falls and as the pressure falls the liquid CO2 converts to gas and restors the pressure. The action of going from liquid state to gaseous requires energy in the form of heat so the bottle 'chills down' as you fire. Fire quickly enough and your bottle becomes coated with condensation and, if you keep on wit the rapid firing, with frost. Once all the liquid has evaporated you're left with, roughly, 800psi in the tank.
For the next shot.
Subsequent shots will lower the pressure each time until, quite quickly, there isn't enough gas to cycle the guns action even if there is enough to actually fire a ball.
With just 250psi in your tank I would guess that you could maybe fire two or three shots at most.

Subject: RE: psi [TANKS]
Date: Mon, 1 Oct 2007 15:26:04 -0500
From: kadams-at-sheldon.k12.tx.us
To: tanks-at-rctankcombat.com

A 9oz CO2 tank regularly sees pressures around the 800psi range.  They usually have a burst disk on them that blows out if you overpressure them.  Iíd guess it should handle 250psi of compressed air with out trouble.  Remember that is a guess though and I donít know if there are any ill effects from putting plain old air in the tank.


From: tanks-admin-at-rctankcombat.com [mailto:tanks-admin-at-rctankcombat.com] On Behalf Of Chrysanthos Kanellopoulos
Sent: Monday, October 01, 2007 9:22 AM
To: tanks-at-rctankcombat.com
Subject: psi [TANKS]


Is this in your video one of those little compressors that can be powered from a car's battery (12V) and cost about BP 10?  I have seen some even in gas stations but have not checked if their pressure can go up to 250 psi. Can you fill a 9 oz bottle with these?  I am asking the forum because you can never get a straight answer from paintball people.  They don't improvise and invent as much as people in this forum do.





Hello Chris
I`ve had some luck today,but I`m firing at 250+psi .
My reservoir may be too small,
I have found its good to squeeze the trigger quickly.
I have a foto of my test
marker and a new vid on youtube.
I`ve looked at your marker and you say :-
"powered by a Co2 bottle instead of an air compressor"
I cant work out how your marker loads, powers or fires.
(it looks good though)
I hope your coping with the new system, I`ve made a bit of a pudding of the signing
in part.

Neil "bit of a pudding" R


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