Join Date: Sep 2008
Location: Victoria B.C. Canada
Thanked 111 Times in 102 Posts
Rep Power: 10
With a Servo pendulum vane, the airvane is set when you are on course. As the boat moves off course the airvane pivots down to one side or the other. When this happens the paddle in the water turns and the force of the boat's movement against the paddle swings it to one side or the other, creating the force to bring the boat back on course with the lines to the tiller.
Living aboard in Victoria Harbour