What characterizes Dutch Roll in aircraft motion?

Dutch Roll is a type of aircraft motion that is characterized by a coupled rolling and yawing motion. This phenomenon typically occurs in aircraft that have a relatively high aspect ratio and is particularly noticeable in light aircraft and some models of larger aircraft.

When an aircraft experiences a disturbance such as turbulence or sharp control input during flight, it may start to yaw to one side. As it yaws, the lift vector becomes displaced, causing one wing to rise and the other to dip. This rolling motion can induce further yawing, creating a feedback loop where the aircraft oscillates in a coordinated manner. Pilots often recognize these oscillations as a characteristic "rolling and yawing" motion that continues until it is dampened by pilot inputs or the aircraft's inherent stability mechanisms.

In this dynamic, the key aspect is that the two motions—yawing and rolling—are linked together, leading to the distinct Dutch Roll pattern. This contrasts sharply with the other options, which describe unrelated or incorrect behaviors of the aircraft.