Patent ID: 8864473

Claim:
A blade ( 1 ) for a rotor of a wind turbine having a substantially horizontal rotor shaft, said rotor comprising a hub from which the blade ( 1 ) extends substantially radially when mounted, said blade ( 1 ) comprising: a chord plane (K) extending between the leading edge ( 5 ) and the trailing edge ( 6 ) of said blade; a root area ( 2 ) closest to the hub, an airfoil area ( 4 ) furthest away from the hub and a transition area ( 3 ) between the root area ( 2 ) and the airfoil area ( 4 ); a single airfoil substantially along the entire airfoil area ( 4 ); at least a first root segment ( 7 ) and a second root segment ( 8 ) along substantially the entire root area ( 2 ), the segments being arranged with a mutual spacing transverse to the chord plane (K), wherein at least one of the root segments ( 7 , 8 ) has an airfoil profile, and wherein a total length of the root area and the transition area is between 5% and 35% of a total length of the blade.