Originally Posted by
deefer dog
Err...but as basil pointed out, in the case of a symmetrical airfoil, with zero angle of incidence, that is not the case. So I ask again, why "not necessarily" in response to basil's post?
Ok, I'll try again.
It is possible, would you agree, to have an asymmetric aerofoil that has superior efficiency inverted than the right way up. It is also possible to mount a wing with an angle of incidence giving reduced drag inverted.
Under both or either of those circumstances, it is possible to have a reduced thrust requirement inverted than the right way up.
Not likely, but possible, and in the realms of this "aeronautic basic concepts shlong measuring" debate which we are all involved in, possible is plenty.
Hence "not necessarily, but good general point"
As I said, come on, keep up!
