On 11 Okt, 22:49, "Androcles" wrote:
"CWatters" wrote in message

...
:
: "mike regish" wrote in message
...
: I think that the shape of the wing simply allows for a greater range of
: angles of attack. A sheet of plywood would providelift, but only at a
: very
: precise and small angle of attack.
:
: The airfoil shape allows the wing to
: provideliftthrough a much larger range of angles of attack.
:
: Well sort of.
:
: Thick wings do tend to operate over a wider range of angles than thin
wings
: but most subsonic wing sections will work from 0 to 10 degrees or more.
It's
: above 12 or 15 degrees that the section becomes more critical.
:
: A conventional wing section with camber can produce +veliftat zero
degrees
: AOA.
:
: The zeroliftangle (the angle at which noliftis produced) is actually
: negative on many conventional sections.

Ever heard ofBernoulli?
Try this demonstration:
http://www.youtube.com/watch?v=KCcZyW-6-5o
A Tomahawk cruise missile uses its wings as a control surface more
than forlift. Straight and level is useful for the computer programmer.
He thinks that way.
http://www.youtube.com/watch?v=19XXTArAGaM


All aircraft fly due to wings Angle of Attack (AOA).

All new airliners have supercritical wings and these wings have a
almost upper surface.


This web shows the vertical downwash from heavy jets, on landing at
London/Gatwick.

http://www.efluids.com/efluids/galle...plane_page.jsp

There are more of them att http://airteamimages.com/ search London/
Gatwick final

Before these pictures we only had the Cessna Citation flying over the
fog, making downwash grave.