Quote:
Originally Posted by dcb
I'm a little confused. You specifically asked for 0 degrees here:
then you say that position doesn't make sense...
My point is that this, and most asymmetrical airfoils, make lift at 0 degrees, so it is simply a matter of going fast enough and/or being light enough before you have a plane that can fly at 0 degrees wing pitch.
What do you think is redirecting the air on top of the wing?
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The Coanda effect is redirecting air, and as I understand that is related to the Bernoulli effect. But it's not the Bernoulli effect itself that is creating the lift. If airflow left the back of the wing at 0 degrees, you could attribute lift to Bernoulli, but lift requires airflow leaving the wing at a downward angle.
That's why the 0 degree plane you use doesn't apply IMO. Because what matters are the angles at the rear of the wing.
You said zero lift happens around -3 degrees. Would that happen to be the angle at which the top and bottom trailing edges are equal angles from horizontal?