Kyle Boatright wrote:
It was under 20F here in Atlanta yesterday morning, but there was zero wind
and the sun was shining bright.

20°F cold? Not here. -20°F more like it. Then the airplane
REALLY performs, but the engine never warms up. Nor does the
Wichita-designed cabin heater. And TAS goes way down. Air's too thick
and draggy.
That cold air you have there was here a little over a week ago.
Temps reached -33°C (-27°F) and we quit flying. Now, for about the
eighth day, it's above 0°C (+32°F) in Chinook conditions, and warmer
in some of our towns above the 60th parallel than in Atlanta.
In Calgary the other day it reached 8°C (+46°F). No more
snow. Shorts and T-shirts everywhere. After -33, +8 is plenty balmy.

Dan, in Canada