Sail pressure point
The sail pressure point is the point on the sail at which a force vector acts as a model, in the simplest approximation the center of gravity of the projected area of a sail 90 ° to the direction of flow of the wind.
In the case of a surf sail, this point can shift significantly due to different sail positions (setting the sail to the wind). This is desirable in windsurfing, because steering is not done with the rudder , but only by shifting the sail relative to the lateral pressure point .
The lever arm between the lateral pressure point and the sail pressure point is the cause of the windward and leeward eagerness of a boat.
See also
literature
- Jeff Toghill: Sailing. From entry level to advanced level . Delius Klasing, Bielefeld 2006, ISBN 978-3-7688-1712-7 , p. 14.