On Fri, 13 Jan 2006 17:14:46 UTC, T o d d P a t t i s t
wrote:

: The point is that the sum (pressure plus MF) is always the
: same, equal to the lift on the airfoil. The point of the
: original post was that you have to account for *both*
: pressure and momentum flux to figure out the force.

Thanks - that was exactly my point. Peraps I was not terribly clear.

Ian