Moisture and humidity?

[ray1377]

when you take say a Benjamin discovery out of an air conditioned house into a 100 degree back yard we always see moisture or sweat beads develop on the outer metal pieces of the gun. My question is, does the same amount of moisture develop inside the air supply reservoir even though its under high pressure?
Thanks
Ray

[oledawg]

In my best guess IF there was moisture in the air in the air supply system, then it may be possible. The moisture you are seeing is condensing from the air outside from the temperature change. If you were using Nitrogen then no.

[Habanero69er]

Especially not in Phoenix.

[AlanMcD]

The answer to your question is no.  In fact, if anything, the opposite happens . . .

The air in the reservoir is part of a closed system - whatever the amount of water molecules that are in there (either as liquid or vapor) does not change as you take the gun from your air conditioned house outside, or vice versa. 

Condensation forms on the outside of the gun because the material is below the dew point of the outside air.  Thus the water vapor close to the gun condenses on it - eventually as the gun warms up the water will evaporate off it.

As for what happens inside the air reservoir, it would be the opposite - the colder gun inside would potentially allow water vapor in the reservoir to condense, and as the gun heats up outside that condensation could evaporate back into vapor inside the gun (only to re-condense when it cools down back inside).

Of course that is why we try to make sure that the air that goes into our guns has a low enough vapor content to prevent condensation in any use case for our guns.

[oledawg]

The answer to your question is no.  In fact, if anything, the opposite happens . . .

The air in the reservoir is part of a closed system - whatever the amount of water molecules that are in there (either as liquid or vapor) does not change as you take the gun from your air conditioned house outside, or vice versa. 

Condensation forms on the outside of the gun because the material is below the dew point of the outside air.  Thus the water vapor close to the gun condenses on it - eventually as the gun warms up the water will evaporate off it.

As for what happens inside the air reservoir, it would be the opposite - the colder gun inside would potentially allow water vapor in the reservoir to condense, and as the gun heats up outside that condensation could evaporate back into vapor inside the gun (only to re-condense when it cools down back inside).

Of course that is why we try to make sure that the air that goes into our guns has a low enough vapor content to prevent condensation in any use case for our guns.

It’s like magic but only real...Science.