Automatic Pilot Follow-Up Control

Automatic Pilot Follow-Up Control, also known as APFC, is a system used in aircraft to assist the pilot in maintaining control and stability during flight. It is a feature of the autopilot system that helps the aircraft maintain its desired flight path and attitude.

The APFC system uses various sensors and inputs to monitor the aircraft's position, speed, and attitude. It then makes adjustments to the control surfaces, such as the ailerons, elevators, and rudder, to keep the aircraft on the desired flight path.

The APFC system can be programmed to follow a specific flight plan or to maintain a certain altitude, heading, or airspeed. It can also compensate for external factors such as wind or turbulence, making small corrections to keep the aircraft stable and on course.

In addition to maintaining control during normal flight, the APFC system can also provide additional safety features. For example, it can automatically initiate a recovery maneuver if the aircraft enters an unusual or dangerous attitude, such as a stall or spin.

Overall, the Automatic Pilot Follow-Up Control system is designed to assist the pilot in maintaining control and stability during flight, reducing workload and improving safety.