Patent ID: 7281683

Claim:
A process for aiding the takeoff of an aircraft comprising trailing edge flaps, leading edge slats, and an adjustable horirontal tailplane to which are hinged elevators, said process comprising: before takeoff, when the aircraft rests on a runway preparing for the takeoff: a) predetermining a value VR of speed of the aircraft at which the takeoff rotation must begin, b) determining a reference speed VRref which is equal to the product K×VS 1 g , in which K is a coefficient greater than 1 and VS 1 g is the speed at which said aircraft stalls when it is flying horizontally with a configuration of the leading edge slats and of the trailing edge flaps which is similar to that used for takeoff, c) for this reference speed VRref, determining a fixed value iH 1 of the angle of deflection of said adjustable horizontal tailplane solely as a function of the longitudinal position of the center of gravity of said aircraft on takeoff, d) deflecting said adjustable horizontal tailplane by an angle whose value is equal to said fixed value iH 1 , e) determining the difference VR−VRref between said rotation speed VR and said reference speed VRref, and f) determining a fixed pitch correction angle ΔiH for said adjustable horizontal tailplane or a fixed pitch correction angle δq 2 for said elevators as a function of said difference VR−VRref; and before or during the takeoff rotation: g) applying: (1) said fixed pitch correction angle ΔiH to said adjustable horizontal tailplane, (2) said fixed pitch correction angle δq 2 to said elevators, or (3) part of said fixed pitch correction angle ΔiH to said adjustable horizontal tailplane and part of said fixed pitch correction angle δq 2 to said elevators.