Denny Esterline wrote:
> Consider a helicopter hovering in otherwise still air. We can all
> agree there is a net downdraft, yes?

Those that paid attention in physics class or ever stood underneath a
hovering helicopter certainly should.

> I don't see it as too difficult to consider the wing of a plane to be
> a big linear fan blade doing essentially the same thing.

Not too difficult because it is.  Usually helicopter blades are described a=
s
rotating wings, but the reverse works too.


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