What is the role of the rudder in an aircraft?

The rudder plays a crucial role in controlling the yaw motion of an aircraft, which is the side-to-side movement of the nose. This control is essential for maintaining directional stability and handling during flight maneuvers. By deflecting the rudder left or right, a pilot can effectively coordinate turns and counteract adverse yaw that occurs when the aircraft rolls.

Using the rudder helps maintain straight flight and can also assist in maintaining control during takeoffs and landings, especially in crosswind conditions. The rudder's effectiveness comes into play significantly during coordinated turns, ensuring that the aircraft does not skid or slide off the intended flight path.

Although control of pitch, increases in lift, and stabilization during turbulence can involve various flight controls and design features of an aircraft, they are not the primary functions of the rudder. Therefore, its main responsibility is to provide yaw control, making it a vital component in the overall flight control system.