Unless we are talking about low canyon flying, rising terrain, or a small or
obstructed or sloping airstrip affected by mountain leaside or solar
subsidence or catabatic flow, particularly if off a glacier.

Just my .02

"Bob Gardner" wrote in message
...
I agree. Not worth spending a single brain cell on.

Bob Gardner

"Peter Duniho" wrote in message
...
"Ravi" wrote in message
oups.com...
I was just wondering; would anybody be able to give me detailed
information on the effects of atmospheric subsidence during night
flying in terms of aerodynamic and engine considerations?

As funny as Paul's reply is, I doubt you'll find anything specific to
your
question there. I'm still looking for a good explanation of what
exactly
"atmospheric subsidence" actually is.

Assuming the dictionary definition is appropriate, there would be
little,
if any, affect of atmospheric subsidence during night flying in terms of
aerodynamic and engine considerations. It might affects density
altitude,
but since you can determine that directly, and since there are many
other
factors that would affect that in a MUCH more significant way,
atmospheric
subsidence is irrelevant from a practical standpoint.

Hope that helps.

Pete