Which statement describes the Outer Loop's relationship to AFCS subsystems?

Which statement describes the Outer Loop's relationship to AFCS subsystems?

• A. Trim and FPS
• B. Stabilator position
• C. Nav data processing
• D. Autopilot

Answer: (A)

The Outer Loop in the AFCS is the high‑level control that shapes how the helicopter follows a flight path, mainly through trim and Flight Path Stabilization (FPS). It takes the pilot’s desired trajectory and reduces control forces by applying trim, and it keeps the aircraft on a commanded flight path rather than enforcing a fixed pitch attitude. In practice, the Outer Loop sets the target for the inner control loops, which handle the actual movement of the stabilator and execution of autopilot commands. Nav data processing and direct stabilator positioning are handled elsewhere in the system, so the Outer Loop’s primary role is to manage trim and flight-path behavior. That’s why the best description is trim and FPS.

The Outer Loop in the AFCS is the high‑level control that shapes how the helicopter follows a flight path, mainly through trim and Flight Path Stabilization (FPS). It takes the pilot’s desired trajectory and reduces control forces by applying trim, and it keeps the aircraft on a commanded flight path rather than enforcing a fixed pitch attitude. In practice, the Outer Loop sets the target for the inner control loops, which handle the actual movement of the stabilator and execution of autopilot commands. Nav data processing and direct stabilator positioning are handled elsewhere in the system, so the Outer Loop’s primary role is to manage trim and flight-path behavior. That’s why the best description is trim and FPS.