Quote:
Originally Posted by B767Driver  I started by questioning a book's authors who were adamant that a portion of lift is created by the vertical velocity vector of the wing downwash.
Realms,
What you are saying is that this is accurate, since the wing is imparting a downward net momentum. Is my understanding correct? |
No, he's not saying that at all. Let me quote him:
Quote:
Circulation, Newton, and Bernoulli are all ways of saying the same exact thing.
Bernoulli - pressure forces generate the lift force (this is the REAL source of lift).
Newton - the reaction to the lift force shoves the air downward.
Circulation - a mathematical result of modeling the lift.
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I added the bolding, but the text is his.
You can always calculate lift by integrating the pressure differences around the airfoil. No need to take into account anything else. Or you can calculate the momentum change of the air to deduce the force that produced it.