Wind passing over the wing produces thrust, and a small tab on the end of the tail attached to the wing controls the angle of attack.
www.saildrone.com/news/what-is-saildrone-how-work
Een soort windvaanbesturing?
Over het zeil:
www.saildrone.com/news/how-saildrone-wing-was-born
On a sailboat, the sails are trimmed with ropes and human force, which requires a lot of power and precise control. Jenkins’ innovation was to use aerodynamic control, so the wing would trim itself for optimum power. In the same way that the tail on an aircraft controls its pitch, and hence the lift generated, the Greenbird tail, mounted vertically, would very precisely control the “angle of attack” of the wing, thus producing maximum power, without stalling. A small tab on the tail—usually referred to as the “elevator” on an aircraft—controlled the tail, while consuming very little energy.
Gepost met de officiële Zeilersforum-app 
