An aircraft beacon device for a wind power installation having a nacelle and a tower supporting the nacelle is provided. The aircraft beacon device includes a plurality of beacon lights, a central control unit for individually controlling the beacon lights, and a transmission system having an energy distribution system for individually supplying electrical energy to the beacon lights to operate the beacon lights. The transmission system has a data bus system for individually controlling the beacon lights, and the data bus system carries control data between the central control unit and the beacon lights.

A ring gate for interrupting the water flow through the water path of a hydraulic machine having a rotor and a spiral. The ring gate includes a first hollow body extending around the rotor axis and is designed to be moved from an open position into a closed position and back in axial direction, whereby no water flow through the hydraulic machine can occur if the first body is in the closed position. The ring gate includes a second hollow body extending around the rotor axis and is designed to be moved from a first position outside of the water path into a second position within the water path and back in axial direction, wherein the second body has openings in its wall through which water can flow when the second body is in the second position and the first body is not in the closed position.

A method and device for connecting and repairing a shear web includes the method steps of dry-fitting a shear web insert in a rotor blade assembly to establish a perimeter gap at an angled perimeter interface between the shear web insert and the rotor blade assembly, the angled perimeter interface positioned between the shear web insert and at least one adjacent surface of a first shear web, a second shear web, a first side of the rotor blade assembly, and a second side of the rotor blade assembly, and then injecting a bonding paste into the perimeter gap. The rotor blade assembly can include a connecting device having at least one pre-fabricated clip.

An aircraft beacon device for a wind power installation having a nacelle and a tower supporting the nacelle is provided. The aircraft beacon device includes a plurality of beacon lights, a central control unit for individually controlling the beacon lights, and a transmission system having an energy distribution system for individually supplying electrical energy to the beacon lights to operate the beacon lights. The transmission system has a data bus system for individually controlling the beacon lights, and the data bus system carries control data between the central control unit and the beacon lights.

The present invention relates to a vertical wind turbine (1) with a plurality of vertical blades (7), which are each fastened to a respective vertical blade axis (26), are each such that they are motor-driven pivotable around a respective blade rotation axis (C.sub.7) independently of one another and are supported rotatable on a common circular path (K) around a vertical rotor rotation axis (C.sub.2), and to a method for operating the vertical wind turbine (1), wherein angular positions of vertical blades (7) of the vertical wind turbine (1), which are each driven around a respective vertical rotor blade axis (26), are predetermined. According to the invention, the vertical wind turbine (1) is operated in a particularly efficient and material-protecting way in that the angular positions of the blades (7) are continuously controlled through a direct drive of each of the blades (7) by means of a respective pitch motor (27) positioned concentrically to the blade axis (26).

The present invention relates to a wind turbine with blade pitch system with an angle between the longitudinal direction of the blade and axis of rotation of the bearing of the blade pitch system, disposing the driving plate of the blade pitch system between the blade and the bearing of the blade pitch system.

A wave power system for extracting energy from water waves, The wave power system includes a basic structure comprising at least one straight track section; at least one effector movably engaged with said basic structurer and adapted for being moved by water waves along said straight track section in a travelling length between two stop locations; and an energy harvesting arrangement arranged for harvesting energy from said relative movements between said energy collector and said basic structurer. The effector includes a backbone structure comprising at least one support shaft having a support shaft axis. At least one winglet comprising a compliant portion is rooted to the support shaft and is turnable between operation modes comprising an acceleration mode an intermediate mode and a deceleration mode relative to the support shaft axis.

A position-controlled wave power generating apparatus. A position-controlled wave power generating apparatus is included a floating part floatable on a body of water, a motion conversion unit coupled to a floating part, a power generating unit generating electricity using a generator connected to a motion conversion unit, and a position control unit positioned below a water surface to generate a thrust from the energy of waves.

A pitch controlled wind turbine (1) comprising a tower (2), a nacelle (3) mounted on the tower (2), a hub (4) mounted rotatably on the nacelle (3), and at least three wind turbine blades (5) is disclosed. Each wind turbine blade (5) extends between a root end (6) connected to the hub (4), and a tip end (7). The wind turbine (1) further comprises at least three blade connecting members (8), each blade connecting member (8) extending between a connection point (9) on one wind turbine blade (5) and a connection point (9) on a neighbouring wind turbine blade (5). The wind turbine blades (5) each comprises an inboard blade part (5a) comprising the root end (6) and an outboard blade part (5b) comprising the tip end (7), the inboard blade part (5a) and the outboard blade part (5b) being connected to each other at a split position (10). The split position (10) is arranged between the root end (6) and the connection point (9).

A joint member for a wind power generation apparatus includes: a first rotor integrally rotating with an output shaft of a speed increaser; a second rotor integrally rotating with an input shaft of a generator; and a one-way clutch provided between the first rotor and the second rotor. A torsion promoting portion being readily twisted and elastically deformed is provided at a portion of the first rotor where power is transmitted from the output shaft to the one-way clutch.