What is the primary function of the AFCS outer loop?

• A. To control the rudder only
• B. To control/maintain heading, altitude, and airspeed
• C. To provide flight path predictions
• D. To assist with engine performance

Answer: (B)

The primary function of the Automatic Flight Control System (AFCS) outer loop is to control and maintain the helicopter's heading, altitude, and airspeed. This system utilizes various inputs from the helicopter's flight data to make adjustments that ensure stability and make it easier for the pilot to manage the aircraft during flight.

By focusing on heading, altitude, and airspeed, the outer loop processes pilot commands and environmental conditions to maintain flight parameters that are critical for safe and efficient operation. This includes using sensors and control algorithms to make continuous adjustments, ensuring that the helicopter operates at optimal settings throughout its flight.

The emphasis on these three parameters enables the AFCS to provide a smoother flying experience and allows pilots to focus more on navigation and mission objectives, rather than constantly managing basic flight characteristics.