wrote

Because the wing is not of infinite weight. The upper atmosphere in
fact =is= deprived of air while the airplane is in flight... that air is
squeezed down below the wing, increasing the pressure on the surface of
the earth, in an amount exactly equal to the weight of the airplane
(divided by the area of the earth).

I think that the downflow dispaces other air which flows up to
replace it--conserving momentum and mass.

I think I will create a new award. I'm not sure what the prize or trophy
will be yet.

I'm calling it "Rec.Aviation Geek of the Decade", or perhaps of "The
Century."

I am in total awe and amazement, that you and Jose have tied for this award,
based on how long you two have kept this amazingly boring subject alive. I
just CAN'T believe it !!!

Now, continue on, or not.

Please, use your restraint, and common sense. Use the "or not." g
--
Jim in NC
(mostly, using his right to use the "ignore thread" button! g