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Old January 11th 06, 01:28 AM posted to rec.aviation.soaring
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Default Thrusting or Sucking (where's Howard Stern when we need him.)

On Tue, 10 Jan 2006 14:20:38 UTC, T o d d P a t t i s t
wrote:

: Circulation theory is 100% consistent with Bernoulli.

What the unititaited don't realise is that forces can be transmitted
by pressure or by momentum flux. At the surface of a wing, all the
force comes from pressure. A long way away from the wing, all the
force comes from momemntum transfer (there is effectively no pressure
difference). As you go from one to the other the balance changes. Most
people who "prove" theories of lift wrong simply forget to take
account of momentum flux.

Ian

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