Refer to figures.
Typically, the Flight Director computes and indicates the direction and magnitude of the control inputs required to achieve an attitude to follow a trajectory.

More specifically, it is a computer system that takes information from the aircraft autopilot sensors, compares the actual state of the aircraft with the desired states demanded by speed, height, course, and power, and displays its output as a series of pitch, roll (2 cues/bars system) and collective (3 cues/bars system) demands.

These demands can be followed by the:

• The pilot, by using the flying controls or

• Autopilot (through selected modes i.e “ALT”, “HDG”, “NAV”, “LOC”) when it is engaged.

To satisfy its commands, the cues/bars movement must be followed so that both cues/bars are centered.

A helicopter's flight director typically has a panel or instrument display that provides the pilot with important information about the aircraft's flight path and performance.