Final answer:
The question is about the Automatic Flight Control System (AFCS) in aircraft, specifically the new feature referred to as the Coupled Flight Director (Coupled FD). This system enhances the autopilot capability by following the guidance of the flight director for improved aircraft control.
Step-by-step explanation:
The student's question pertains to the Automatic Flight Control System (AFCS) found in aircraft. The AFCS is a sophisticated network of systems that automates various aspects of an aircraft's flight. The new additions to the AFCS could refer to several advanced features that enhance the automation of flight controls, but the student's question includes the term Coupled FD, which stands for Coupled Flight Director.
The Coupled FD is an advancement in the flight director system which allows autopilot systems to follow a set of flight parameters such as heading, altitude, and speed based on inputs from the flight director. It effectively pairs the autopilot with the guidance provided by the flight director for precise control during different phases of the flight, such as takeoff, en route navigation, and landing.
The new additions to the AFCS (Automatic Flight Control System) are Autothrottle and Coupled Flight Director.