Adverse yaw is an aerodynamic phenomenon occurring during aircraft turns, where the nose of the aircraft tends to move in the opposite direction of the turn, opposing the intended direction.

*Causes*

1. Differential lift: Unequal lift between wings during turns.
2. Aileron drag: Drag created by aileron deflection.
3. Wingtip vortex: Interference from wingtip vortices.

*Factors influencing adverse yaw*

1. Aircraft design (wing shape, aileron size)
2. Airspeed and altitude
3. Turn rate and radius
4. Control input (aileron and rudder)

*Effects*

1. Reduced turn performance
2. Increased pilot workload
3. Potential loss of control

*Mitigation techniques*

1. Coordination: Using rudder and aileron together.
2. Differential aileron deflection: Reducing aileron angle.
3. Rudder trim: Adjusting rudder bias.
4. Aircraft design modifications: Optimizing wing and aileron design.

*Types*

1. Primary adverse yaw: Initial yaw opposing the turn.
2. Secondary adverse yaw: Yaw occurring during sustained turns.

Author – Eng. Mohammed Freihat

Categorized in:

Aircraft Engineering,

Last Update: October 31, 2024