An In Depth Explanation

What Is Dutch Roll?

An In-Depth Explanation

Definition

Dutch roll is an aircraft motion that consists of an out-of-phase combination of tail-wagging yaw and rocking from side to side roll. It occurs when an aircraft rolls in one direction while yawing in the opposing direction.

Explanation

Dutch roll is essentially a series of out-of-phase turns. When an aircraft experiences Dutch roll, it rolls in one direction and yaws in the other. This motion is often described as a "classic damped yaw oscillation with a roll."

Characteristics

Dutch roll is characterized by a combination of a continuous back and forth rolling and yawing motion. This motion is often described as a "figure-8 effect."

Causes

Dutch roll is caused by the interaction of the aircraft's dihedral effects and its directional stability. When the dihedral effects are more powerful than the directional stability, the aircraft will experience Dutch roll.

Prevention

Dutch roll can be prevented by increasing the aircraft's directional stability. This can be done by adding a vertical stabilizer or by increasing the sweepback on the wings.

Conclusion

Dutch roll is a common aircraft motion that is caused by the interaction of the aircraft's dihedral effects and its directional stability. It is a benign motion that does not pose a safety hazard, but it can be uncomfortable for passengers.