What aspect of flight does a clockwise rotating propeller specifically affect?

A clockwise rotating propeller has a significant impact on the aerodynamic forces acting on the aircraft, particularly affecting yaw and roll. When a propeller rotates clockwise, it generates a torque reaction that tends to turn the aircraft to the left (yaw to the left) as observed from the pilot's perspective. This is due to Newton’s third law—every action has an equal and opposite reaction.

Additionally, the rotation of the propeller also influences roll. As the propeller spins, it creates asymmetrical lift due to the difference in airflow across the wings. The rotation produces a tendency for the aircraft to roll in the opposite direction of the propeller's spin. In a clockwise rotating propeller, this means the aircraft may roll to the left.

Understanding how propeller rotation affects yaw and roll is essential for pilots, as they need to compensate for these aerodynamic effects during flight, especially during takeoff and climb-out phases where power and torque are maximized. This knowledge helps in maintaining control and stability of the aircraft during various phases of flight.