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In the Ray Kurzweil's book How to create a mind is said that:

The mathematics of how Bernoulli's principle produces wing lift is still not yet fully settled among scientist [...]

What does this statement mean? I have always known that the Bernoulli equations were well known. There is something that I am missing?


marked as duplicate by John Rennie, RedGrittyBrick, jinawee, Kyle Kanos, tpg2114 Nov 25 '15 at 16:49

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  • $\begingroup$ See also http://physics.stackexchange.com/questions/290/what-really-allows-airplanes-to-fly. For more try this search. $\endgroup$ – John Rennie Nov 25 '15 at 16:36
  • $\begingroup$ When Kurzweil says that, there must be more to what he is saying. As you've quoted it, it makes no sense. I'm trying to guess what he's referring to. Is it the reason behind the Kutta condition, for example? $\endgroup$ – Mike Dunlavey Nov 25 '15 at 18:00
  • $\begingroup$ I feel like somebody else has made a comment about this same statement. The reality is, from a physics perspective we all know how lift is made and there is no doubt about it. From a simplified model perspective, we come up with various ways to explain how each model predicts list. And surprisingly many models get it right by looking at things that wouldn't normally make sense -- equal transit, Bernoulli effect, bound circulation, etc.. $\endgroup$ – tpg2114 Nov 25 '15 at 18:55
  • $\begingroup$ @tpg2114: equal transit gets it right? $\endgroup$ – Mike Dunlavey Nov 25 '15 at 18:57
  • $\begingroup$ @MikeDunlavey Under a very restricted set of cases, I believe it does. But I always dismissed it as confusing and nonsensical so I didn't think about it past when it was introduced in my undergrad aerodynamics course. $\endgroup$ – tpg2114 Nov 25 '15 at 18:58