In article ,
Beryl wrote:

Alan Baker wrote:
In article ,
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.

Yes, but Newton's laws tell us that there is a net force down on the
air. No net force down on the air, no net force up on the plane.

Force is change of momentum with respect to time.

BTW, the man whom you are contradicting

I don't think I contradicted anything there. Point it out.

is Scott Eberhardt, Bachelors & Masters Degrees in Aeronautics and
Astronautics from MIT, Ph.D. in the
same field from Stanford, research scientist at the NASA Ames Research
Center, faculty of the University of Washington.

But... ...really...

http://books.google.com/books?id=wmu...T5&dq=Scott+Eb
erhardt+aeronautics+and+astronautics&source=bl&ots =skN-zbDvej&sig=msQ-_Im
p6t-P62ehNWIld7RRYWs&hl=en&ei=GgEeS4f4AYzStgPB5eiCCg&s a=X&oi=book_result&
ct=result&resnum=6&ved=0CBsQ6AEwBQ#v=onepage&q=dow nwash&f=false

...what would *HE* know about it compared to you?

Likely a lot, and possibly nothing. I've encountered more than a couple
supposed "authorities" on specific subjects who don't know squat, but
they're masters at bull****ting their ways to lofty titles and
positions. Did you know that a gas cools as it's compressed? One layer
of the atmosphere is called the hemisphere? The stuff in grass that
makes it green is chloroform? A jet fighter cruising straight and level
at high speed experiences tremendous G forces due to the speed?

Sorry, but if I have to trust what you understand versus what he
understands, it isn't even a contest.

And I'd like to see you show just *who* is supposed to have said those
things and whether they are actually educated in the appropriate fields.

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