Patent ID: 11939072
Assignee: AIRBUS HELICOPTERS
Field: Transport (Mechanical engineering)
Classification: CPC B  Y | IPC B

Claim 13:
14. The method of claim 11 wherein the hybrid power plant of the rotorcraft is provided with a plurality of engines, each of the engines is in the on state, and each of the engines are located in different zones of the rotorcraft, the method further comprising:
performing with the control unit the first control step for controlling a given one of the engines located in a zone of the rotorcraft where noise level is to be reduced so as to lower the speed of the given one of the engines until the speed of the given one of the engines reaches the silent speed; and
performing with the control device the second control step for controlling the electric machine so that the electric machine delivers mechanical power supplementary to any mechanical power delivered by the given one of the engines for driving the rotor in rotation while complying with the setpoint speed of rotation of the rotor.