Abstract: A testing stand for a helicopter transmission is arranged in a testing stand (20) capable of swiveling deflection around a rotor shaft (4) with one output side rotor shaft (4) and at least one drive side input shaft (6, 8). Actuators (28, 30) are provided around the rotor shaft axis (4) for swiveling deflection of the helicopter transmission (2) to equalize shifts on connection couplings (14, 16, 22) occurring under load. It is suggested that the helicopter transmission (2) be clampable in the testing stand (20) by connection elements (24, 26) elastic with respectable to swiveling deflection.

Abstract: The inventive stress test rig for helicopter transmission comprises a first test rig transmission (16) which is driven by a motor (38) and forms a closed stress circuit via shafts (4, 14, 54), connecting couplings (12) a stress mechanism (40, 42), a second test rig transmission (52) and a test transmission (2) having a rotor shaft (4) on the output side. To house the test transmission (2), it has a clamping plate (23) which by means of at least one actuator (22) can be rotated about the rotor shaft axis of the test transmission to compensate load-induced displacements at the connecting couplings (12) of the test transmission.