"Steve B" fired this volley in
:

"Jim Wilkins" wrote

The Mustang's wing is symmetrical top and bottom, as you can see by
sighting down it from the wing tip.
http://www.aviation-history.com/theory/lam-flow.htm

jsw

Isn't symmetrical when you can fold it in half along one plane, and two
sides match?

Steve


And where does it say in that site that the Mustang's airfoil was
symmetrical? Symmetrical airfoils are used predominantly for aerobatics
where extended inverted flight or strong negative Gs need to be pulled,
but they aren't very effective for range and speed. One has to maintain
a significant angle of attack to develop lift (either way, up or down).

The site you quoted was talking about NACA-designed lamilar flow
airfoils. That doesn't translate directly to "symmetrical".

LLoyd