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From: C. Marin Faure (no email)
Date: Sat Aug 16 2003 - 02:58:03 EDT
Subject: Re: TWL: Bernoulli effect is not why wings fly
To: , ,
>So how does a symetrical wing push air down? Bump me back to a previous
message if I missed the answer. Thanks, Al Halverstadt (no trawler yet but
working on it)
While you would have to ask a true aerodynamicist for that explanation, and
it would involve a lot of math and big words, the simple explantion is that
the shape of the wing surface combined with the angle of attack, which is
the angle at which the wing meets the air (and you can't judge this by the
direction the fuselage is pointed, by the way), causes the air flowing
around the wing to be deflected downwards with a force equal to the weight
of the airplane.
I'm not saying that wing shape is not important. It's critically important
to the effect the wing will have on the air. What I AM saying is that it's
not critical to have a wing that maximizes the Bernouli effect because the
Bernouli effect is a relatively minor contributor to the generation of
lift. So many aerobatic planes, and most fighters, have wing shapes that
are the same, or almost the same, on the upper and lower surfaces of their
wings. Whatever that shape is, it, combined with the angle of attack of
the wing, is designed to move air down with enough force to generate an
opposite reaction equal to the weight of the airplane.
This subject has nothing to do with trawlers, so I'm hesitant about
responding to posts commenting on my original post about why a wing flies.
I'll be happy to discuss the subject off-list, as some have already done.
But if most of you feel this topic should not be pursued here, I'll happily
go along with that.
_______________
C. Marin Faure
GB36-403 "La Perouse"
Bellingham, WA
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