Abstract: The modular kit for a tower has a height ranging between a minimum height and a maximum height, in particular for a wind energy turbine, comprises a first conical tower segment (10) comprising a steel tube having a predetermined length (11), a second conical tower segment (12) comprising a steel tube having a predetermined length (12), and a first cylindrical tower segment (14) comprising a steel tube having a length between a predetermined minimum length and a predetermined maximum length. The length of the first cylindrical tower segment (14) can be adapted to the necessary height of the tower between its minimum height and its maximum height. The minimum height is the sum of the predetermined lengths (11,12) of the first and second conical tower segments (10,12) and the minimum length of the first cylindrical tower segment (14).

Abstract: The hydraulic brake system comprises a piston/cylinder unit (14) for activating and releasing a brake (12), comprising a volume (16) adapted to have a pressurized working fluid supplied thereto for moving the piston (24) from a braking position into a release position for releasing the brake. Further, the hydraulic brake system comprises a supply line (18) for the supply of working fluid from a reservoir (22), a discharge line (30) for the discharge of working fluid from the volume (16) of the piston/cylinder unit (14), a first valve (34) and an element (36) for determining the flow resistance, a bypass line (32) provided with a second ON/OFF valve (38) and arranged for a flow in parallel to the discharge line (30).

Abstract: The device for adjusting a rotor blade of a wind energy turbine is provided with a driving device (12) for driving an adjusting e ement (24) for selectably rotating the rotor blade (26) in both directions about its longitudinal axis (28), an energy storage unit (30) and a free-running means (32) adapted to be selectively activated, said free-running means (32), in its activated state, allowing rotation of the rotor blade (26) by means of energy stored in the energy storage unit (30) only in one of the two directions up to a desired rotational position.