Quote:
Originally Posted by C Sean Watts
Not at all silly when you consider the temps at altitude. On average decrease, 10 (C) per 1000 feet.
|
Speaking of silly!!! That would put the typical freezing level well below 4000' MSL.
The generally accepted figure is 2* C per 1000' of altitude change in the troposphere. At airliner altitudes, you can expect a temp very close to -55*C.