What aerodynamic force is known to cause left yaw in an aircraft during flight?

The aerodynamic force that causes left yaw in an aircraft during flight is P-Factor. This phenomenon occurs primarily in propeller-driven aircraft and is a result of the difference in the angle of attack between the ascending and descending blades of the propeller during a climb.

When the aircraft is in a climbing left turn, the descending blade on the right side of the propeller has a higher angle of attack compared to the ascending blade on the left side. This creates an asymmetrical lift pattern, with the descending blade generating more thrust than the ascending blade. Consequently, this imbalance of thrust causes the aircraft to yaw to the left.

Understanding P-Factor is essential for pilots, as it highlights the need for proper rudder input to counteract this yawing tendency during various phases of flight, especially when the aircraft is flying at a high angle of attack, such as during takeoff or in a climb. This ensures better control and stability of the aircraft.

Other options like torque, drag, and lift play significant roles in flight dynamics but do not specifically describe the left yaw caused by the propeller's asymmetric thrust during climbing conditions.