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Old 01-08-2008, 03:41 AM
  #33  
Cubdriver
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My post was a bit verbose but what I meant was that Bernoulli's Law is based on Newton mechanics and cannot be separated from it since it is based on it. Bernoulli's Law requires conservation of mass and conservation of momentum. The conservation of momentum law is a consequence of F=ma. A debate about suction versus Newtonian forces is meaningless, although it is true that pressure coefficients on top of the wing are more negative than anywhere else, and it would seem that Bernouilli is operative on top and not the bottom. Lift is the result of the wing altering the entire flow field around it and it can't be divided into pieces since it's a complete package of simultaneous physical events happening all around the wing to quite a distance away. In fact most of the pressures are negative, even on the bottom. The only positive pressures are those found at the leading edge. Breaking it into pieces like suction and reaction force may help understand supporting principles, but in the end they are intertwined. It is true that one can calculate the lift on a wing by summing the coefficients of pressure around it like Barry Schiff. Just keep in mind this in no way illustrates Bernoulli versus Newton.

Last edited by Cubdriver; 01-08-2008 at 05:07 AM.
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