Patent ID: 7440826

Claim:
A steering aid system for controlling altitude and horizontal speed, perpendicular to the vertical, of an aircraft ( 4 ; 152 ), in which altitude and horizontal speed are controlled by varying the pitch of the aircraft and/or the power developed by the lifting means ( 10 ; 156 ) of the said aircraft, wherein it comprises: a measuring device ( 22 ; 180 ) capable of delivering a measured signal as a function simultaneously of both the altitude of the aircraft and the horizontal speed of the aircraft; an identical pre-set reference value ( 26 ; 182 ) for the altitude and the horizontal speed of the aircraft, this value being independent of variations in the said measured signal, and means ( 20 ; 178 ) forming a servoloop for slaving the signal to the said reference value, these means being capable of automatically varying the pitch and/or the power developed by the lifting means for the purpose of slaving the measured signal to the reference value.