How does adverse yaw occur during a roll?

Adverse yaw is a phenomenon that occurs during a roll due to the differential drag produced by the ailerons. When the aircraft rolls to one side, one aileron (the one on the wing that is going up) moves upward, while the opposite aileron (on the wing that is going down) moves downward. The downward-deflecting aileron increases lift but also increases drag on that wing. Consequently, the wing with the increased drag moves slower than the other wing, which causes the aircraft to yaw in the opposite direction of the roll.

This dynamic explains why the downward-deflecting aileron, which creates more lift, also results in increased drag, leading to adverse yaw. The aircraft's natural tendency is to rotate in the direction of the roll due to this differential in drag. Understanding this effect is crucial for pilots, as they need to manage adverse yaw, often by coordinating aileron input with rudder input for a coordinated turn.

The other options do not accurately describe the mechanics of adverse yaw. For instance, having both ailerons deflect at the same angle would not create the necessary differential in lift and drag to induce adverse yaw. Similarly, a significant decrease in the aircraft's speed or