Cubdriver

I could have saved several posts on this thread earlier simply by using the term "flow turning". That is precisely what I was thinking. A wing causes flow turning which is a more central concept even than Bernoulli.

1. Suction on the topside of a wing is inseparable from the operative principle of flow turning. Even Bernoulli's Law serves this principle, and Newton mechanics is the more relevant approach to understanding.

2. Lift is the byproduct of flow turning and is a result of the complete flow field around a wing. This point is aimed at Ira Flato's original incorrect statement that a wing does not possess lifting properties on the bottom.

Once again, Bernoulli's Law is important but it does not explain suction on top of a wing; the larger picture is that of a complex flow-field best understood by Newton mechanics and most easily summarized as flow turning. We tend to stick to Bernoulli as a crutch because the accurate picture is not so easy. Lift is a topic better minds in physics struggled with into the 1940s, and as a topic it gets kind of prickly.