Patent ID: 8408870

Claim:
A wind turbine having blades wherein at least one of the blades consist of a first component ( 11 ) having an aerodynamic profile with a leading edge ( 5 ), a trailing edge ( 7 ), and suction and pressure sides between the leading edge ( 5 ) and the trailing edge ( 7 ) and a second component ( 13 ) attached to the end of leading edge ( 5 ) and/or to the trailing edge ( 7 ) of the first component ( 11 ) in at least a part of the blade, wherein: the second component ( 13 ) consist of one or several upwards and/or downwards deflectable flaps ( 15 , 15 ′) that allows changing the flow over the blade; the deflectable flaps ( 15 , 15 ′) consist of suction and pressure sides; each of said deflectable flaps ( 15 , 15 ′) has means for deflecting which comprise a scaling device ( 21 ) that, depending on the pressure detected at a predetermined location ( 17 ), to which the deflectable flap is connected by means of a duct ( 19 ), generates an actuating force or torque proportional to the changes in the wind pressure at said location ( 17 ).