Pre-bent wind turbine blade with multiple inflection points and method of making same

A method of making a wind turbine blade having a root end, a tip end, and an outer shell, the method comprising:

• providing a first mould half having a first mould cavity;
• providing a second mould half having a second mould cavity;
• moulding the outer shell of the blade using the first and second mould halves,
• wherein the first mould cavity and the second mould cavity are contoured such that the outer shell of the blade defines a pitch axis and a blade centre line axis extending along a length of the blade, the blade centre line axis defining a pre-bend in the blade, and
• wherein the curve that defines the blade centre line axis of the blade includes at least a first inflection point (I1) and a second inflection point (I2) between the root end and the tip end of the blade.

A mould assembly for making a wind turbine blade having a root end, a tip end, and an outer shell, the mould assembly comprising:

• a first mould half having a first mould cavity;
• a second mould half having a second mould cavity, wherein the first mould half and the second mould half are arrangeable to form the outer shell of the blade;
• wherein the first mould cavity and the second mould cavity are contoured such that the outer shell of the wind turbine blade defines a pitch axis and a blade centre line axis extending along a length of the blade, the blade centre line axis defining a pre-bend in the blade, and
• wherein the curve that defines the blade centre line axis of the blade includes at least a first inflection point (I1) and a second inflection point (I2) between the root end and the tip end of the blade.