Abstract: A shaft mounted rotor brake (7) with at least one braking force absorption element non-rotatable connected to said shaft (1). A stationary brake actuator (8, 24) is mounted to a rotor gear box housing (4). Said stationary brake actuator (8, 24) actuates a braking force transmission element (17, 23) that is functionally coupled to the at least one braking force absorption element (2) so as to exert a braking effect. At least one rotor brake deactivation device (6, 9, 25) is provided. The at least one braking force absorption element comprises lamellas (2) interacting with stationary lamellas (3), said lamellas (2) and stationary lamellas (3) being arranged inside of the rotor gear box housing (4) with oil inside.

Abstract: A shaft mounted rotor brake (7) with at least one braking force absorption element non-rotatable connected to said shaft (1). A stationary brake actuator (8, 24) is mounted to a rotor gear box housing (4). Said stationary brake actuator (8, 24) actuates a braking force transmission element (17, 23) that is functionally coupled to the at least one braking force absorption element (2) so as to exert a braking effect. At least one rotor brake deactivation device (6, 9, 25) is provided. The at least one braking force absorption element comprises lamellas (2) interacting with stationary lamellas (3), said lamellas (2) and stationary lamellas (3) being arranged inside of the rotor gear box housing (4) with oil inside.

Abstract: A planetary gear (1, 20, 30, 40) for variable transmission, particularly a planetary gear for variable transmission towards a tail rotor of a helicopter. At least one gear set (s1, s2, s3, s4) of a sun gear (w4, w6, 21) comprises a ring gear (w1, w7), planetary wheels (2, 22, 32) and a planet carrier (w2, w3, w8). At least one clutch (k, K1, K2) and at least one freewheel (Fl, FL1, FL2) are provided for at least two different speeds of the planet carrier (w2, w3, w8) as output.

Abstract: The invention is characterized by optical deflector units comprising at least two optical reflectors, which are in case rigidly connected to one another indirectly or directly via a retaining element, and in that a first of the two retaining elements is indirectly or directly in engagement with the first coupling component via a mechanical gear unit providing a rotatable operative connection.

Abstract: A method of measuring torque acting on a drive shaft (13) and a torque measurement system for implementing said method. Vibration sensors (18, 20) are attached to each of said main gearbox (11) and said tail gearbox (15) in order to detect gear mesh vibrations resulting from interaction of said drive shaft (13) with said main gear (12) and said tail gear (16), said detected gear mesh vibrations being transferred to an evaluation unit (19) for analysis.

Abstract: A method and a device for contactless determination of forces and/or moments acting on a hollow cylindrical body (12), in which via a light source (20; 38; 40), light radiation is produced within the hollow cylindrical body (12); measurement signals are recorded by an optoelectronic sensor (22; 34); the measurement signals recorded by the optoelectronic sensor (22; 34) are supplied to the signal processing unit (26); the signal processing unit (26) detects and outputs changes of the measurement signals relative to an initial state determined beforehand by calibration, corresponding to the initial undeformed state of the hollow cylindrical body (12); and when a mechanical deformation of the hollow cylindrical body (12) is present, according to a calibration function or a calculation rule, the signal processing unit (26) outputs an output signal that describes the forces and/or moments that are causing the mechanical deformation of the hollow cylindrical body (12).

Abstract: A rotor brake for a rotary-wing aircraft includes a rotor shaft, a braking-force actuator configured to be hydraulically actuated, a braking-force pick-up element connected to the rotor shaft and operationally connected to the braking-force actuator, an electromechanical piston control element, and a first hydraulic line connecting the electromechanical piston control element to the braking-force actuator so that the braking-force actuator can be actuated electrohydraulically by the electromechanical piston control element.

Abstract: A method of measuring torque acting on a drive shaft (13) and a torque measurement system for implementing said method. Vibration sensors (18, 20) are attached to each of said main gearbox (11) and said tail gearbox (15) in order to detect gear mesh vibrations resulting from interaction of said drive shaft (13) with said main gear (12) and said tail gear (16), said detected gear mesh vibrations being transferred to an evaluation unit (19) for analysis.

Abstract: A method and a device for contactless determination of forces and/or moments acting on a hollow cylindrical body (12), in which via a light source (20; 38; 40), light radiation is produced within the hollow cylindrical body (12); measurement signals are recorded by an optoelectronic sensor (22; 34); the measurement signals recorded by the optoelectronic sensor (22; 34) are supplied to the signal processing unit (26); the signal processing unit (26) detects and outputs changes of the measurement signals relative to an initial state determined beforehand by calibration, corresponding to the initial undeformed state of the hollow cylindrical body (12); and when a mechanical deformation of the hollow cylindrical body (12) is present, according to a calibration function or a calculation rule, the signal processing unit (26) outputs an output signal that describes the forces and/or moments that are causing the mechanical deformation of the hollow cylindrical body (12).

Abstract: A rotor brake for a rotary-wing aircraft includes a rotor shaft, a braking-force actuator configured to be hydraulically actuated, a braking-force pick-up element connected to the rotor shaft and operationally connected to the braking-force actuator, an electromechanical piston control element, and a first hydraulic line connecting the electromechanical piston control element to the braking-force actuator so that the braking-force actuator can be actuated electrohydraulically by the electromechanical piston control element.