Adverse yaw during a turn entry is caused by which drag effect?

Adverse yaw during a turn entry is caused by which drag effect?

• A. Increased induced drag on the lower wing and decreased on the upper wing.
• B. Decreased induced drag on the lowered wing and increased induced drag on the raised wing.
• C. Drag is the same on both wings during a roll.
• D. Turbulence causes yaw during turn entry.

Answer: (B)

Adverse yaw comes from the difference in induced drag between the wings when you initiate a roll. Deflecting the ailerons to roll raises the outside wing and lowers the inside wing. The outside (raised) wing increases lift, which increases its induced drag; the inside (lowered) wing has less lift and less induced drag. That extra drag on the raised outside wing slows it relative to the other wing, yawing the airplane toward the outside of the turn — opposite the intended roll. So the increased induced drag on the raised wing and the decreased induced drag on the lowered wing is the key mechanism behind adverse yaw.

Adverse yaw comes from the difference in induced drag between the wings when you initiate a roll. Deflecting the ailerons to roll raises the outside wing and lowers the inside wing. The outside (raised) wing increases lift, which increases its induced drag; the inside (lowered) wing has less lift and less induced drag. That extra drag on the raised outside wing slows it relative to the other wing, yawing the airplane toward the outside of the turn — opposite the intended roll. So the increased induced drag on the raised wing and the decreased induced drag on the lowered wing is the key mechanism behind adverse yaw.