Physics of Flight

I don't know if anyone here has looked into flight physics, but it seems much more complicated than the classic explanation would lead you to believe.The classic explanation of flight involves Bernoulli's principle, which states that the faster a fluid is moving, the less pressure that fluid will exert on its surroundings. The wing of an aeroplane is curved so that, in cross section, that top is longer than the bottom. The air stream splits at the leading edge of the wing and meets back at the trailing end. Since the top air stream travels a further distance in the same amount of time, it must be traveling faster. Therefore, according to Bernoulli's principle, it exerts less pressure than the bottom and lift is generated.This explanation is very problematic on logical and empirical grounds. 1. There seems to be no reason the air streams would have to meet at the same time after they split, and 2. They empirically don't; the top stream travels much faster than predicted by the model.The other explanation involved Newton's third law. The wing is angled slightly upward as it is accelerated into the air. The air collides with the bottom of the wing and is deflected downward. The collision causes the wing to be pushed upwards.This is also problematic because it neglects the top of the wing. I also don't think the math works out, i.e., you could generate enough lift if this were the sole mechanism.So how do aeroplanes fly? My educated guess:The bottom of the wing is moving towards the air, which is being deflecting downward. Just as the Newtonian model would explain it. But, in addition, the top of the wing is moving away from the adjacent air. This would create a partial vacuum, i.e., less pressure.So, in effect, there is pressure being built up on the bottom and pressure being removed from the top. These effect combined explain lift.Probably not, but that's the best I can do. Any input would be greatly appreciated.Also, any insight into the physics of flapping wings would be appreciated. I found this website: How Birds & Ornithopters Fly.It seems to explain alot of the physics, but I'm not sure if its correct.Edited by JustinC, : No reason given.