"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