Patent ID: 8655510

Claim:
A method of regulating the propulsion speed of a hybrid helicopter having at least one main lift rotor and at least one propulsive propeller provided with a set of variable-pitch blades, the main rotor and the propulsive propeller being driven in rotation by at least one power plant of the hybrid helicopter; said method of regulating implementing control means that work out control orders relating to at least one mean pitch setpoint for the blades of the propulsive propeller as a function of a piloting order generated by an operator by means of at least one manual control member and as a function of the power being consumed by the propulsive propeller; and said regulating method comprising various piloting processes, including: a piloted process whereby the piloting orders for varying the pitch of said blades are generated by the manual control member; and a corrective process whereby corrected piloting orders for varying the pitch of said blades are generated on the basis of a piloting order that is corrected with reference to at least one limiting regulation parameter that relates to the strength capacity of the hybrid helicopter; wherein: the piloting orders relate to an airspeed setpoint; and the corrective process is implemented on the basis of said airspeed setpoints in accordance with at least one first correction mode in which the corrected piloting orders are derived from piloting orders that are corrected in application of a first rule taking account of a setpoint consumed power corresponding to the airspeed setpoint derived from the piloting order.