Nimbus-
You write:
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"Not sure about your statement that the downwash is caused by wingtip vortices…!
I would have thought that the wingtip vortices are an undesirable result of the whole up-/downwash action, not the
cause!"
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While I agree with the statement made previously that you are referencing, I should point out to you that I was QUOTING Dr. HC Smith, Director of undergrad studies in Aerospace Engineering, Penn State! Are you saying he is wrong? If so, then so is John Anderson, Chris Carpenter, et al. Go look at the NASA web site I posted earlier as well. All the PhDs in Aero agree with each other. You don't agree with them. Sorry, but I think I'll beg to differ with you and go along with the folks who write the textbooks on the subject!
As for your statement referencing bricks as "proof" that it's Newton and not Bernoulli, all that tells me is that you truly don't understand what Bernoulli is and how to apply it. You clearly lack the basic concept of what is generating the flow that brings about the differences in pressure. I suggest again, more strongly than ever, that you buy and read Flightwise: Principles of Aircraft Flight, by Chris Carpenter (who is, incidentally, the head of aerodynamics at the Royal Air Force college).
[This message has been edited by Prof2MDA (edited 22 April 2001).]
[This message has been edited by Prof2MDA (edited 22 April 2001).]