 |  | | | |  | |  |  | Pneumatics in the cold? |  | |  |  | |
 Posted: Sun Dec 04, 2011 11:01 am |
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| Jr. Squirreler |
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| Joined: 12 Dec 2010 |
| Posts: 419 |
| Location: New York |
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| I wanted to know if the cold will effect my 1377c as it does C02? |
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| Posted: Sun Dec 04, 2011 11:09 am |
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| rsterne |
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| Location: Coalmont, BC |
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Very little.... If you pump it inside and then take it outside and let it cool a lot you will lose a tiny amount of power.... However, if you pump it up outside and shoot it outside it will act normally....
Bob |
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Dominion Marksman Silver Shield - 5890 x 6000 in 1976, and downhill ever since!
Airsonal: Too many to count! |
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| Posted: Sun Dec 04, 2011 12:46 pm |
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| domer_pyle |
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| What about pre-charged? I know stepping into the cold will lower the pressure a little but velocities stay the same, right? |
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| Posted: Sun Dec 04, 2011 12:57 pm |
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| rsterne |
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PCPs and pneumatics change pressure in proportion to the ABSOLUTE (Rankine) temperature.... That's degrees F plus 460.... 40*F is 500*R and 140*F is 600*R.... If you fill a PCP to 3000 psi at 140*F and cool it to 40*F the pressure will be 2500 psi....
The velocity on the PCP may vary slightly depending on where in the shot string you are.... If you're counting shots and filled the gun inside, you will get fewer shots until the velocity drops off.... If you read the GAUGE pressure on the rifle and go by that it will shoot normally.... If you fill it outside (and assuming you can get a full fill from your source tank) and then bring it inside.... the pressure will increase.... If your gun is prone to valve lock you might experience that if the temperature change is big enough....
Bob |
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Dominion Marksman Silver Shield - 5890 x 6000 in 1976, and downhill ever since!
Airsonal: Too many to count! |
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| Posted: Mon Dec 05, 2011 6:27 pm |
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| domer_pyle |
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| Bob I gotta say, you're much like myself. Whenever someone asks me anything they get a lot more info about their question that they even asked for lol. Thanks though, I'm a sponge for any knowledge that interests me |
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| Posted: Sat Dec 10, 2011 9:34 pm |
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| radar |
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Co2 may be more affected because it boils off to create gas volume, and must absorb external heat to do that.
PCPs and springers, as already posted, no significant effect over the range of outdoor temperatures. |
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It's never too late to have a happy childhood. |
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| | | | | | | | | Pneumatics in the cold? | | | | | |
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