Patent ID: 8583295

Claim:
A method of controlling and regulating a rotorcraft presenting a high and stabilized speed of advance, the rotorcraft comprising at least one main lift rotor, at least one variable pitch propulsion propeller, and at least one power plant for driving the main rotor(s), said method including using a first loop for regulation in pitching or longitudinal attitude by means of a longitudinal cyclic pitch control (C) for the blades of the main rotor(s), and a second loop for speed regulation by means of a mean pitch control of the blades of the propulsion propeller(s), wherein the method further includes controlling the deflection angle of a horizontal tailplane by using a third loop for controlling and regulating said deflection angle of the horizontal tailplane to minimize the total power consumed by the main rotor and by the propulsive propeller(s) for a given speed of advance and attitude.