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
