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

Claim 16:
17. The rotorcraft of claim 15 wherein:
the one or more engines of the hybrid power plant is a plurality of engines, the engines being located in different zones of the rotorcraft; and
the control unit further configured to control each engine located in a zone of the rotorcraft where noise level is to be reduced so as to lower the speed of the engine until the speed of the engine reaches the silent speed; and
the control device further configured to control the electric machine so that the electric machine delivers mechanical power supplementary to a total of any mechanical power delivered by each engine located in a zone of the rotorcraft where noise level is to be reduced for driving the rotor in rotation while complying with the setpoint speed of rotation of the rotor.