The Rocket takes a small amount of matter and throws it at great speed
in X direction, getting and equal and opposite reaction in the opposite
direction Y... The prop grabs a large amount of air and throws it in X
direction, getting an equal and opposite reaction in Y... The principal
is the EXACT same.

Yes, inasmuch as it is action-reaction by Newton. The nit I was trying
to pick was that a propeller is viewed (correctly) as part of the
airplane, and the exhaust fire is also viewed (albeit incorrectly) as
part of the rocket.

The rocket pushes against the fire (in the nozzle, which =is= part of
the rocket). The airplane pushes against the air (against the
propeller, which is part of the airplane). These forces make the
vehicles go.

Although the rocket exhaust does in fact push against the air, the
exhaust isn't part of the rocket, and that "pushing" doesn't make the
rocket go.

Jose
--
"There are 3 secrets to the perfect landing. Unfortunately, nobody knows
what they are." - (mike).
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