ATPL Airframe Practice Test

Question: 1 / 400

What type of adjustment is rudder trim in an irreversible flight control system?

Adjustment of the rudder ratio changer

Adjustment of the zero force rudder position

In an irreversible flight control system, rudder trim refers to the adjustment of the zero force rudder position. This type of adjustment is crucial because it allows the pilot to set the rudder in a position where it maintains a straight flight path without requiring continuous input from the pilot. In an irreversible system, the control surfaces, including the rudder, are designed such that once adjusted, they hold their position without reverting back to neutral under aerodynamic loads.

By adjusting the zero force position, a pilot can effectively counteract any yawing moments caused by asymmetrical thrust or other factors, ensuring that the aircraft flies straight and level without constant rudder input. This is particularly important for reducing pilot workload and enhancing aircraft stability. Thus, this adjustment plays a vital role in maintaining effective control and comfort in flight operations.

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Adjustment of the rudder trim tab

Unnecessary for the airplane

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