What is the primary effect of adverse yaw?

The primary effect of adverse yaw is that it causes yaw in the opposite direction of a turn. When a pilot initiates a turn, the wing that rises to generate lift (the outer wing) produces more drag than the wing that descends (the inner wing). This differential drag leads to the aircraft yawing towards the opposite direction of the intended turn, which is characterized as adverse yaw. Understanding this phenomenon is crucial for pilots, as it affects the coordination of control inputs during turns. Properly managing adverse yaw involves using ailerons and rudder together to maintain a balanced flight path and prevent uncoordinated turns.