What is the function of the rudder in an aircraft?

The rudder's primary function in an aircraft is to manage yaw, which is the side-to-side movement of the aircraft's nose around its vertical axis. By controlling yaw, the rudder plays a crucial role in maintaining coordinated flight, especially during turns. When an aircraft turns, it experiences a tendency to roll, and the rudder helps counteract adverse yaw, ensuring that the aircraft maintains a proper flight path without excessive sideslip. This coordination enhances safety and efficiency during maneuvers.

Furthermore, the rudder works in conjunction with the ailerons and elevator to provide balanced control of the aircraft. It helps ensure that the aircraft responds smoothly and predictably to pilot inputs, contributing to overall stability and control during flight. This function is especially important in various flight conditions, including turbulence and while executing turns.