An aircraft control system that simultaneously controls vertical speed (or flight path angle) and airspeed or Mach number by supplying the vertical speed (or flight path angle) command to the autothrottle system and the airspeed or Mach command to the autopilot pitch channel. A thrust reference computer...http://www.google.fr/patents/US4764872?utm_source=gb-gplus-shareBrevet US4764872 - Vertical flight path and airspeed control system for aircraft
Vertical flight path and airspeed control system for aircraft