Andrew Stiller wrote:
On Feb 9, 2005, at 2:53 PM, John Howell wrote:
Bernouli's law, ...Same law that holds up both fixed-wing and
rotary-wing aircraft.
Actually, that can't be the case, though everybody thinks it is. If
Bernoulli's law were responsible for lift in aircraft, airplanes
wouldn't be able to fly upside-down--and they can.
I'm confused by this remark -- Bernoulli's law deals with the flow of
air over an air-foil and the difference in presssure on the under side
of the wing and the top of the wing. When a plane flies upside down
there is still an upper side and a lower side for the air to work
against. Well designed wings (as in aerobatic planes) work equally well
no matter which side is up.
What doesn't work is for planes to fly with their wings in a vertical
orientation since there is no upward lift on the wings. Which is why
planes don't fly that way for very long, if at all, before the pilot has
to level them out.
--
David H. Bailey
[EMAIL PROTECTED]
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