Patent ID: 8295997

Claim:
A pilot assistance method for assisting the piloting of a rotary wing aircraft, the method comprising the steps of using a real value Nr and a reference value Nr0 for a speed of rotation of at least one rotor and using display means to present on a display screen ( 5 ) a movable scale ( 6 a ) for indicating collective pitch position P, the method further comprising: using a maximum limit value Nr+ and a minimum limit value Nr− for rotor rotation speed; determining using a processor a desynchronization pitch Pds corresponding to the position of the collective pitch P from which transmission of mechanical torque from a turbine engine unit and a main gearbox is interrupted; displaying the desynchronization pitch Pds on the movable scale ( 6 a ) by using a floating reference marker ( 9 ); translating in real time and as a function of physical flight parameters, the maximum limit value Nr+ and the minimum limit value Nr− respectively into a bottom limit position Pinf and a top limit position Psup for the collective pitch P, said limit positions Pinf and Psup being active; displaying the bottom and top limit positions Pinf and Psup on the movable scale ( 6 a ); comparing in real time the real value Nr of the speed of rotation of the rotor with the reference value Nr0 for the speed of rotation of the rotor; and when a determined difference appears between the real value Nr and the reference value Nr0 for the speed of rotation of the rotor, displaying at least one item of corrective information on the display screen ( 5 ), said information being at least visual and concerning action to be undertaken by the pilot on adjustment of the collective pitch P.