Abstract: A rotor assembly includes a rotor mast, a rotor and a pivot arrangement. The rotor mast is for rotatable attachment of the rotor assembly to a support structure for rotation of the rotor assembly relative to the support structure about a rotation axis. The rotor has two rotor blades extending in a virtual plane in a longitudinal direction. The two rotor blades are arranged to be propelled by air flow. The pivot arrangement defines a pivot axis. The rotor is pivotably connected to the rotor mast for pivoting the two rotor blades simultaneously relative to the rotor mast about the pivot axis. The longitudinal direction and a projection of said pivot axis in the virtual plane enclose a constant acute angle in the virtual plane. A windmill and a wind farm includes the rotor assembly with a capacity in the range of 15-50 MW/km2.

Abstract: a rotor assembly comprising: a rotor mast for rotatable attachment of said rotor assembly to a support structure for rotation of said rotor assembly relative to said support structure about a rotation axis, a rotor having two rotor blades extending in a virtual plane in a longitudinal direction, wherein said two rotor blades are arranged to be propelled by air flow, and a pivot arrangement defining a pivot axis, wherein said rotor is pivotably connected, by said pivot arrangement, to said rotor mast for pivoting said two rotor blades simultaneously relative to said rotor mast about said pivot axis wherein said longitudinal direction and a projection of said pivot axis in said virtual plane enclose a constant acute angle in said virtual plane. A windmill and a wind farm comprising the rotor assembly, wherein a capacity of said windfarm is in the range of 15-50 MW/km2.

Abstract: A wind energy conversion apparatus includes a supporting structure. The apparatus further includes a shaft having a first and a second end, which is rotatably journalized in the supporting structure, as well as at least one rotor blade having a first end and a second end, which rotor blade is mounted on the shaft with both ends.

Abstract: A wind energy conversion apparatus comprising supporting structure is presented. The apparatus further comprises shaft having a first and a second end, which is rotatably journalled in said supporting structure, as well as at least one rotor blade having a first end and a second end, which rotor blade is mounted on said shaft with both ends. The object of the presented wind energy conversion apparatus is to improve the known apparatus and to provide an apparatus which is capable of converting a larger amount of wind energy into other forms of energy. Accordingly wind energy conversion apparatus according to the invention is to that end characterised in that the rotor blade is provided with additional wind capturing means.

Abstract: A wind energy conversion apparatus comprising a supporting structure is presented. The apparatus further comprises shaft having a first and a second end, which is rotatably journalled in said supporting structure, as well as at least one rotor blade having a first end and a second end, which rotor blade is mounted on said shaft with both ends. The object of the presented wind energy conversion apparatus is to improve the known apparatus and to provide an apparatus which is capable of converting a larger amount of wind energy into other forms of energy. Accordingly wind energy conversion apparatus according to the invention is to that end characterized in that the rotor blade is provided with additional wind capturing means.