Which input has priority when both the tiller and the rudder pedals are used?

Which input has priority when both the tiller and the rudder pedals are used?

• A. The rudder pedals override tiller.
• B. Tiller inputs override rudder pedal inputs.
• C. Autopilot determines priority.
• D. Inputs are averaged.

Answer: (B)

In the 747-8, steering is controlled by two devices: the nose‑wheel steering via the tiller for ground and low‑speed turns, and the rudder pedals for aerodynamic yaw control in flight. The system is set so that when both are used, the nose‑wheel steering from the tiller takes precedence. This prevents conflicting inputs from fighting each other and gives the pilot predictable ground steering behavior. The autopilot isn’t determining this priority here, and the inputs aren’t simply averaged. So the tiller input overrides the rudder pedal input.

In the 747-8, steering is controlled by two devices: the nose‑wheel steering via the tiller for ground and low‑speed turns, and the rudder pedals for aerodynamic yaw control in flight. The system is set so that when both are used, the nose‑wheel steering from the tiller takes precedence. This prevents conflicting inputs from fighting each other and gives the pilot predictable ground steering behavior. The autopilot isn’t determining this priority here, and the inputs aren’t simply averaged. So the tiller input overrides the rudder pedal input.