Wind turbine rotor blade and wind turbine rotor

A wind turbine rotor blade, comprising:

• a root end by which the blade can be fixed to a rotor hub;
• a tip end located opposite the root end;
• a leading edge extending from the root end to the tip end;
• a trailing edge extending from the root end to the tip end;
• a span direction defined by a line extending linearly from the root end to the tip end;
• a chord direction perpendicular to the span direction and which lies in the plane extending through the leading edge and the trailing edge;
• a shoulder defined as the point of the maximum chord-wise extension, and
• an airfoil portion extending from the shoulder to the tip end,
• wherein the airfoil portion comprises a span-wise interval beginning before the tip end and extending to or close to the tip end and in which the distribution of the chord-wise extension is increased as compared to the load optimised distribution of the chord-wise extension.

A wind turbine rotor comprising:

• a rotor hub;
• and
• a wind turbine rotor blade fixed to the rotor hub, the bade comprising:
• a root end by which the blade can be fixed to a rotor hub;
• a tip end located opposite the root end;
• a leading edge extending from the root end to the tip end;
• a trailing edge extending from the root end to the tip end;
• a span direction defined by a line extending linearly from the root end to the tip end;
• a chord direction perpendicular to the span direction and which lies in the plane extending through the leading edge and the trailing edge;
• a shoulder defined as the point of the maximum chord-wise extension, and
• an airfoil portion extending from the shoulder to the tip end,
• wherein the airfoil portion comprises a span-wise interval beginning before the tip end and extending to or close to the tip end and in which the distribution of the chord-wise extension is increased as compared to the load optimised distribution of the chord-wise extension.