Certified Flight Instructor - Flight Instructor Airplane Practice Exam

The correct answer describes the effects of a clockwise rotating propeller when viewed from the rear. A propeller's rotation causes the slipstream—the air accelerated by the propeller—to spiral backwards and around the aircraft. For an aircraft with a clockwise rotating propeller, the spiraling slipstream will have a tendency to move around to the left, creating a yawing motion in that direction. This is due to the fact that the left side of the propeller pushes more air downward and creates a higher pressure on that side compared to the right side, leading to a yaw to the left around the vertical axis. Additionally, the propeller's rotation and the resulting induced airflow can also result in a roll to the right around the longitudinal axis. This rolling tendency occurs because the right side of the propeller produces a greater lift as the increased airflow on the left side tends to create a downward force on that side, generating a right roll. Thus, the description of a left rotation around the vertical axis and a right rotation around the longitudinal axis is accurate regarding the effects of this specific propeller rotation and the characteristics exhibited during flight.