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I'm not sure that the absolute MAP numbers that you quoted are of any
value. What is important IMO is the difference between the atmospheric pressure
and the MAP. I am shooting for the same value for atmospheric and
MAP.
You're right
of course Jim. If I were looking at tenths of an inch of pressure, I would
worry about the atmospheric. I think we can safely assume standard
29.92" atmospheric for the purposes of looking for multiple inches of
missing pressure.
I will try to
note the altimeter reading next time, and it's certainly dialed into my
altimeter from Sunday still, so I can even look at what it was when I
collected these numbers.
Rusty
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