Abstract: A wind-driveable wing construction (30) which comprises a tether line (40), which is designed to connect the wing construction to a ground station (10) during operation, and one end of the tether line (40) being attached to the wing construction; and a bridle line system comprising a multiplicity of bridle lines (70, 71). At least two bridle lines having an end connected to the wing construction and at least one bridle line has an end connected to the tether line (40). The bridle line system is detachably connected to the tether line, during operation. The tether line (40) has a first sleeve (130) which is attached to the tether line, the bridle line system has a second sleeve (120), to which the at least one bridle line (70, 71) is connected. A capture cable is passed through the second sleeve, and the sleeves are designed to form a detachable connection.

Abstract: A drive unit provided with at least one powertrain which is equipped with at least two widely spaced operating points for achieving a high rotational speed spread with a high degree of efficiency. A method for controlling the load speed of a corresponding device, specifically, a wind turbine plant is also disclosed.

Abstract: A tethered passive wing system for the conversion of flow energy into electric energy which exhibits optimized aerodynamic and mechanical properties for reliable and efficient operation and is only connected through one or more tensile elements to a converter unit and comprises an optimized combination of rigid, non-flexural structural elements such as, for example, beams and shell structures and flexible fabric structures, such as, for example, membranes, films, laminates.