(Thom Stewart) wrote in message ...
Jan,

Your answers are showing a great lack of knowledge and understanding. I
dought very much that you have read any of these works you 're posting.
If you have
read them then you better get some one to explain what they are saying.
You are screwed up to many ways

Examples; A pitot tube has no air flow thru it. Wind sock does have air
flow thru it
3; Centrifugal force is an outward direction from a inner point, 4; How
can you have Air Velocity in other direction than from high to low
pressure. 5; How Ground effect applies to a sail 6; how does Coander
exits if there isn't isn't a Bernoulli Vacuum created by the curved
surface of the wind 7; Are we seeing the results of Bernoulli, Newton,
coander?

In other word, You tell me. Don't print a Web site and think you are off
the hook. You, yourself, Tell us what the tell-tales are reacting to.
ON A SAIL. That is what this post is about. I don't think you can do
that

Ole Thom

Pims webpage tell you everything you need to know about the physics of
sailing.

http://www.sailtheory.com/index.html

Wings, sails, rudders and curved walls/roofs all works the same way:

Deflecting airflow and thus creating a force, action/reaction!

The Coanda effect causes the air/fluid flow to follow a curved
surface.

Since the airflow always try to go straight ahead as Newton 1 law say,
centrifugal/centripetal forces create local pressure gradients.

Thats the force acting on the curved surface.

A fluid always goes from high pressure to low pressure, just as the
weathermap tells us every day.

The pressure of the airflow on the weather map can never be explain by
the velocity of the airflow. Thats physically impossible.

High airflow velocity can never create low pressure!

Thats only a mathematical manipulation!

There is no "Bernoulli Vacum"!

There are many new websites explaining Lift forces physically correct,
not using mathematical modelled Potential/Circulation Theory,
Conformal Mapping, etc


Jan-Olov Newborg