wrote in message
...
On Mar 2, 8:37 pm, "Kyle Boatright" wrote:
I suspect the moisture in the air made your engine deliver less power,
therefore fewer RPM...

More water per cubic foot of air = less of everything else, including
oxygen.


So, on that volkswagon / SUV parcel size chunk of air, would the air
be less dense? I am not quite sure I understand what you mean above,
but what you describe above, I perceive you saying more dense as the
prop would have to work harder to slice through moisture laden air.

Everything I have read so thus so far, deals with the air in general
going up, is less dense, but nothing within a "benign" fair weather
cumulus cloud. Air below a stratus cloud is more dense then the
stratus cloud itself, and above the cloud is even less dense.

I think I will post to a weather forum and see if they can answer the
meteorological portion of that question.

Allen

The air density doesn't change, but the amount of oxygen per cubic foot
does. Imagine a one cubic foot in size. It is full of red balls
(nitrogen), white balls(oxygen), and green balls (CO2). It won't hold
another ball without removing something. Now, you have to add a bunch of
black balls (H2O). Which means you have to take out some red, white, and
green ones to make space. Now your 1 cubic foot box holds less nitrogen,
oxygen, and CO2. This is essentially what happens when the humidity rises.
What it means to a combustion engine is that the engine won't produce as
much power, because there is less oxygen per cubic foot (or whatever) of
air.

KB