What causes adverse yaw in a turn and how can you prevent it?

• A. Adverse yaw is caused by tailwind mixing
• B. Diff aileron drag during a roll causes yaw opposite the roll; prevent with coordinated use of rudder and aileron
• C. Yaw is unaffected by roll inputs
• D. Adverse yaw occurs when using rudder only

Answer: (B)

Adverse yaw in a turn happens because using ailerons to roll creates unequal drag on the wings. When you roll, the wing with the aileron down increases lift and drag, while the opposite wing with the aileron up has less lift and drag. The extra drag on the down-going wing yaws the nose opposite the direction of the roll, so the aircraft turns less toward the roll direction than intended. To prevent this, coordinate your controls by using a touch of rudder toward the direction of the turn as you roll. This keeps the nose in line with the roll, making the turn coordinated and preventing the nose from yawing the wrong way.