A horizontal axis wind turbine (1) with a wind turbine blade (5) is disclosed, the wind turbine blade (5) comprising a hinge (6) arranged to connect the wind turbine blade (5) to a blade carrying structure (4) of the wind turbine (1), at a non-zero distance from an inner tip (5a) and at a non-zero distance from an outer tip (5b) of the wind turbine blade (5). An outer blade part (7) is arranged between the hinge region and the outer tip (5b), and an inner blade part (8) is arranged between the hinge region and the inner tip (5a). The outer blade part (7) extends from the hinge region along a first direction and the inner blade part (8) extends from the hinge region along a second direction, and the first direction and the second direction form an angle, α, there between, where 0°<α<90°.

A horizontal axis wind turbine (1) with a wind turbine blade (5) is disclosed, the wind turbine blade (5) comprising a hinge (6) arranged to connect the wind turbine blade (5) to a blade carrying structure (4) of the wind turbine (1), at a non-zero distance from an inner tip (5a) and at a non-zero distance from an outer tip (5b) of the wind turbine blade (5). An outer blade part (7) is arranged between the hinge region and the outer tip (5b), and an inner blade part (8) is arranged between the hinge region and the inner tip (5a). The outer blade part (7) extends from the hinge region along a first direction and the inner blade part (8) extends from the hinge region along a second direction, and the first direction and the second direction form an angle, α, there between, where 0°<α<90°.

The present invention presents a structure for a set of cable-stayed blades for variable-speed wind turbines with the aim of manufacturing low-cost, large-capacity wind turbines with blades of up to 200 meters long, do not rotate to change the tilt of the wing, insulated from turbine shaft, the structure includes the steel tube at the center of the central hub for affixing the blade set onto the head of the wind turbine shaft, a tower to extend the turbine vertical axis for mounting stay cables which are fastened to the axial bearing blade frame, the blade body consists of a triangular prismatic frame with two rear-framing tubes parallel to each other to form the baselines for mounting blade surface sheets which can be furl/unfurled, the blades can be disassembled and placed into containers to be transported to the base of the turbine tower for assembly.

The invention relates to a wind turbine system (WTS) comprising at least two blade rotors rotatably mounted to a nacelle (rotatably) mounted to a tower provided above a (water) level. The WTS can be characterised in that the blade rotors are interconnected by one or more retractable blades. The retractable blades can have variable properties, they can be stowable, can be able to weathervane, and can comprise a defined construction, a working mean. The blade rotors can rotate in the same and/or opposite directions. The components can be fabricated of defined materials. The WTS can be provided in an array and it can be couplable or coupled with various mechanocomponents and/or electrocomponents. A method for varying a design point of the disclosed wind turbine is proposed.

A pneumatic motor has a housing, an axle, and multiple blades. The axle is rotatably mounted in the housing and has multiple blade recesses. The blades are mounted respectively and moveably in the blade recesses. Each blade has an inner side edge. The inner side edge is mounted in a corresponding one of the blade recesses. The inner side edge of each one of at least half of the multiple blades has a straight segment and a rectangular tab. Each one of the blade recesses which holds the blade having the straight segment and the rectangular tab has a bottom having a straight segment and a tab hole.

A pneumatic motor has a housing, an axle, and multiple blades. The axle is rotatably mounted in the housing and has multiple blade recesses. The blades are mounted respectively and moveably in the blade recesses. Each blade has an inner side edge. The inner side edge is mounted in a corresponding one of the blade recesses. The inner side edge of each one of at least half of the multiple blades has a straight segment and a rectangular tab. Each one of the blade recesses which holds the blade having the straight segment and the rectangular tab has a bottom having a straight segment and a tab hole.

The present invention presents a structure for a set of cable-stayed blades for variable-speed wind turbines with the aim of manufacturing low-cost, large-capacity wind turbines with blades of up to 200 meters long, do not rotate to change the tilt of the wing, insulated from turbine shaft, the structure includes the steel tube at the center of the central hub for affixing the blade set onto the head of the wind turbine shaft, a tower to extend the turbine vertical axis for mounting stay cables which are fastened to the axial bearing blade frame, the blade body consists of a triangular prismatic frame with two rear-framing tubes parallel to each other to form the baselines for mounting blade surface sheets which can be furl/unfurled, the blades can be disassembled and placed into containers to be transported to the base of the turbine tower for assembly.