I haven't had time to read this whole thread but there are a few things that I have to through in after reading a few of steveh's posts. The reason the Bernoulli equasions don't seem to be accurate for a wing is because most people seem to think that if 2 paricles of air side by side strike the leading edge of a wing and one goes over the top of the wing and the other goes under the wing, the two particles must both meet back up at the exact same time at the trailing edge of the wing. This is an insane assumption. There is no law of physics that says this will happen. The equasions aren't wrong, the assumptions people are making are wrong.
Next, the relation between the Coanda effect and lift. The Coanda effect simply shows how air is accelerated by the wing. I don't mean slowed down or speed up, I mean that the direction of travel is changed. Remember that when you have a wing creating lift, there are only 2 elements interacting, the air and the wing. If the wing is creating lift it must be doing it by interacting with the air in some way. Lift is a force normal to the direction of air flow. The only possible way for a wing to create lift is if it creates an equal but opposite force on the air. That force is accelerating a mass of air downward. Contrary to some of the bizzare circulation theories, air must be deflected downward in order to create a force on the wing in the opposite direction.
Circulation theories, CRACK SMOKING BS. Just a little bit of common sense will show that this idea is totally wrong. If there is a circulation around the wing that produces the lift then I should be able to destroy all lift by destroying the circulation. Since the "circulation" is from the trailing edge toward the leading edge on the bottom of the wing, all I should have to do is greatly accelerate the air under the wing from the leading edge toward the trailing edge to distroy the circulation. What if we bolt a jet engine under the wing to accelerate the air flow. By the reasoning of the circulation theory, every jet that has an engine mounted under the wing should never be able to get off the runway. By use of simple vector math you can show that a circulation plus a flow does not create lift. Some of the assumptions and leaps made by Mr. Gentry are soo wild I can't believe anyone would take him seriously.
I'm sure that many people will disagree with me on the circulation theories and I welcome your arguments but first I ask you to think for your self rather than blindly following the latest craze in lift theories. Does it make sense?
