Assisted take-off method for aircraft

An assisted take-off method for an aircraft comprising a trimmable horizontal stabilizer onto which are articulated elevators, the method comprising:

• predetermining:
• a value VR of the speed of the aircraft, called the rotation speed, at which must begin the take-off rotation at the end of the acceleration phase during which said aircraft is running on the ground whilst accelerating, and
• a regulation range of speed values within which must be said rotation speed VR;
• and
• applying a take-off assistance pitch command to said aircraft deflecting said trimmable horizontal stabilizer by an angle of predetermined value, wherein:
• selecting arbitrarily, prior to said acceleration phase, within said regulation range of speed values, a reference speed VRref, lower than said rotation speed VR, and determining, for that reference speed VRef, said predetermined value of a deflection angle of said trimmable horizontal stabilizer at least as a function of the longitudinal position of a center of gravity of said aircraft on take-off;
• and
• during said acceleration phase:
• measuring the speed VC of said aircraft;
• determining continuously the variable deviation existing between said measured speed VC and said reference speed Vrref;
• and
• carrying out a variable correction of said take-off assistance pitch command according to said speed deviation.