On Feb 12, 5:38*pm, Dudley Henriques wrote:
You are correct in that there are incorrect theories of lift in play,
but totally incorrect in any assumption that these incorrect theories
are not so well known as to be considered at this point in time 101 by
any good flight instructor.and indeed, any well trained pilot.
For you to appear here and state that pilots generally are unaware of
these issues is disingenuous *to a fault and totally untrue.

Hmm...the NASA site and a few other sites I found a few months ago
seemed to imply that incorrect theories of flight were still popular,
even among pilots. But of course, I cannot know.

There are basically 3 incorrect theories of lift and they are the equal
transit theory, the "venturi" theory, and the reaction theory concerning
the underside of the wing.
Both Bernoulli and Newton are in themselves complete explanations of
lift as both occur at the same instant in time on the surface generating
lift and one can not physically be present without the other.
Each can be used to explain lift, and good CFI's present lift explaining
how both interact.

This information as I said is basic to all good pilots and CFI's.

Well, this response could have saved us a lot of typing in my OP on
backwash long ago.

Also...my Jeppesen "Private Pilot" "Guided Flight Discovery" book was
published in 2007, and what is written in it contradicts what is
written on the NASA site. And what is written at two promiment aero/
astro texts in the USA contradicts what is written on the NASA site.
And what my own flight instructor told me in ground school contradicts
what my physics book says.

I did consider the possibility that pilots who teach/write these books
know that some of what is being taught/written is not accurate, but,
in the interest of matriculating and moving the student quickly
through flight learning, they simply repeat what was said in early
days of flight.

Being an engineer, I would rather have had a disclaimer, something
like, "There is still much debate on this issue....but this is what we
know or think we know.."

-Le Chaud Lapin-