Beeman 1085 - CO2 Puncture Problems

[Ribbonstone]

Somehow I seem to have turned into the 12gr. co2 guy.....but it may just be temp. related.

Good...more spring gave the #1 12gr. a holeand shot better (faster).

Time...conduction....takes awhile for the internal temp to warm up to ambinat...and we can only judge ambinat/external temp.  So even a thermomenter stuck to the side of the air tube is going to take some time to "even up" after popping/decompressing 2X12gr.

(Co2 is not cold.  It's whatever temp-pressure it's been resting in for a time in.  We only think of it as cold as that is the only way we have direct experience with it.  Co2  is great at cooling by decompression because it gets a"double dip".  Cools by gas expansion and cools by the liquid to gas conversion that supplies the gas.)


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Am still having a fight with my 1085.   Accuracy went south on me for no reason I can easily diganose.   It'snot a leak, it's not barrel cleaning,and it's not velocity varation related.

No external leak detected. Looked a bit like cooking at one point; flour dusted looking for a possible leak during firing.

Don't know how I could have nicked/bumped/screwed up the crown with a big-azz LDC attached.  Shoots the same with the LDC attached or bare-barrled.

Right now. I'm still trying to get it back where it once was....reassembling as I type this after findingfnothing wrong with the internal seals/mechanics.

[AndyKunz]

Somehow I seem to have turned into the 12gr. co2 guy.....but it may just be temp. related.

Welcome to the club! 

I do some online support for the radio control products I develop, and people think I know all there is to know about their type of RC model.  Fortunately for them I've been doing it long enough (40 years) that I've picked up a good bit from others even though I don't participate in their exact hobby.  I get so many messages asking for help with their airplane ...

But the principles work for RC just like they do for gases.  Avogadro, Boyle, Charles, and Amontons laws are all the same.

Time...conduction....takes awhile for the internal temp to warm up to ambinat...and we can only judge ambinat/external temp.  So even a thermomenter stuck to the side of the air tube is going to take some time to "even up" after popping/decompressing 2X12gr.

Temperature was getting colder over time, that was pretty obvious.  Velocity was going up, though not as dramatically as it had last time out.

Andy