Patent ID: 8215588

Claim:
Steering unit for a wind propulsion system, the steering unit comprising: a first fixed attachment means ( 35 ) configured to secure a first end of a tractive cable ( 43 ), wherein a second end of the tractive cable is secured to a device or a vehicle to which a tractive force shall be transferred; a second attachment means ( 31 a, b , 36 a, b , 33 , 34 ) configured to attach a number of tractive lines ( 40 a, b , 41 a, b ), a second end of each of the tractive lines being secured to an aerodynamic wing element ( 11 a , 12 a , 21 ); and a mechanical support frame ( 100 , 110 ) connecting the first attachment means to the second attachment means for transferring a tractive force, characterized in that the second attachment means comprise at least one upper fixed attachment point ( 31 a, b ), a left moveable attachment point ( 36 a ), a right moveable attachment point ( 36 b ), and steering actuator means ( 33 , 34 , 120 , 130 , 140 a - c ) configured to vary the distance between the upper fixed attachment point and the left moveable attachment point and for varying the distance between the upper fixed attachment point and the right moveable attachment point.