In article ,
Beryl wrote:

Alan Baker wrote:
In article ,
Beryl wrote:

Alan Baker wrote:

It's true that the exhaust stream doesn't directly push on the inner
surface of a rocket engine.
Yeah, I like that aerospike design, the inside-out nozzle thing.

wing encounters some unmoving air, and the wing then throws the air
downwards, the velocity of the air has been changed, and the wing
will experience an upwards reaction force. At the same time, a
downwash- flow is created.
The wing, remember, is moving forward. "Downwards" is one component of
circulation.

Those weren't my words.

What do you suppose happens to "downwash" when it goes up? Say, pulling
positive G force at the top of a loop? Now you lost the surface of the
earth, the only thing that, according to you, finally stops it.

The earth still stops it:

Gravity: perhaps you've heard of it?

--
Alan Baker
Vancouver, British Columbia
http://gallery.me.com/alangbaker/100008/DSCF0162/web.jpg