What is the phenomenon called that describes rolling oscillations caused by aircraft yaw?

The phenomenon that describes rolling oscillations caused by aircraft yaw is known as Dutch Roll. This oscillation involves a combination of yawing (side-to-side movement) and rolling (tilting from side to side). When an aircraft experiences yaw, it can cause one wing to rise while the other lowers, creating a rolling motion. This leads to a coupled oscillation where the plane oscillates in a coordinated manner, resulting in a characteristic motion that can be somewhat wavy.

Dutch Roll is typically observed in aircraft that have high aspect ratio wings, and it can be influenced by factors such as the aircraft's design, load distribution, and control responses. Pilots need to manage these oscillations effectively to maintain control of the aircraft, especially during turbulent flying conditions or when there are sudden changes in speed and direction. The implementation of yaw dampers in modern aircraft helps to mitigate this phenomenon, providing smoother flight and increasing safety.