"The Flying Scotsman" wrote:

Ok, in relevance to Dougs post... we are both correct !!! apart from
the down wash from the small propeller, they will not be any airflowing
over the rest of the wings... why ??? Because the airplane is not
moving !!!!

Reread the stated problem:

"a conveyer belt that moves in the
opposite direction at exactly the speed that the airplane is moving
forward."
Seems a pretty direct contradiction to the claim that it is not
moving. In fact, it very explicitly says that the plane is moving
forward, and at the same speed as the conveyor. So when the conveyor
is moving at takeoff speed, so will the plane, and the sound of the
tires will be that of a plane moving twice takeoff speed (the speed of
the plane relative to the conveyor.

its only compensating for the exstreem backward force, as i
said its only standing still, and standing still doesnt get you
anywhere. you need momentium.

It however, would be possible if you have a plane with an exceedingly
small wing span, very low stall speed and a big propeller to generate a
downwash to cover the entire wing. As you know your aillerons are
situated at the outer section of the wings, if you have no downwash
over them it will stall and not turn leading to a temporary lift and
then crash.

Barry

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