Test rig for rotors of gyrocraft

Test rig for rotors of gyrocraft, comprising:

• an electric motor with a substantially vertical output shaft, said electric motor being anchored in a foundation block on a substantially horizontal test area and intended to drive blades of a main rotor at least in a performance test configuration,
• a main mechanical framework with a first shell structure housing said motor, said main framework also being anchored in said foundation block,
• a transmission comprising at least one lower shaft line provided above said motor and driven in rotation by said motor, said transmission being supported by said main framework while being guided in said main framework in alignment with said output shaft of said motor,
• a force interface for measurement of moments and forces generated by said blades of said main rotor at least in the performance test configuration, said force interface comprising a main balance supported by said main framework,
• a framework height extender, including a second shell structure, of upwardly convergent shape, said height extender being mounted on said main balance in the performance test configuration,
• at least one upper shaft line of said transmission which is supported and guided in said height extender,
• a coupling means for connecting said upper shaft line in rotation to and in line with said lower shaft line,
• a main inverse thrust rotor mast equipped with a blade pitch control means for controlling a pitch of said blades, said main inverse thrust rotor mast being mounted on said height extender so as to prolong said upper shaft line while being integral in rotation with said upper shaft line, and having a rotational drive interface, and
• at least one inverse thrust rotor hub jig connected to said drive interface of said main inverse thrust rotor mast, said inverse thrust rotor hub jig supporting said main rotor blades in an inverted position by presenting an upper surface of said blades towards the ground in such a way that, by driving said blades by said motor in an opposite direction of rotation to a normal direction of rotation of said blades, thrust is exerted downwards on said main inverse thrust rotor mast with an inverse thrust in a test of said blades in the performance test configuration using said blades.