kd5sak wrote:

"Richard Lamb" wrote in message
nk.net...

TRUTH wrote:

"Jim Macklin" wrote in
news:uX8Lf.104268$4l5.39451@dukeread05:

Bernoulli theory:

So how do these equations relate to our two-dimensional airfoil? Look
again at
the Clark Y and notice that an airfoil is a curved shape. While the bottom
is
relatively flat, the top surface is thicker and more curved. Thus, when
air
passes over an airfoil, that flow over the top is squeezed into a smaller
area
than that airflow passing the lower surface. The Continuity equation tells
us
that a flow squeezed into a smaller area must go faster, and the Bernoulli
equation tells us that when a flow moves faster, it creates a lower
pressure.


I don't quite understand the "squeezed into a smaller area". I Understood
that the flow over the top surface had to travel further (thus faster) over
the longer curved distance to get from the leading edge to the back of the
airfoil. I am just a lay person and do not even play an aeronautical
engineer on TV so I may be totally mistaken.

Harold


I go ya one better, Harold.

The AIR isn't even moving!
So how does it FLOW anywhere?

Richard

But I did save a bunch of money by switching to Geico...