Which of the following is NOT a factor affecting critical engine performance?

Throttle position does not directly affect the critical engine performance in the same way the other factors do. Critical engine performance primarily refers to how the aircraft behaves when an engine fails during flight, and it is influenced by aerodynamic forces and the dynamics of thrust.

P-factor, which describes the asymmetrical propeller loading, plays a significant role in determining how the aircraft will yaw and roll in response to engine failure. It is the result of the angle at which the propeller blades meet the relative airflow, affecting lift and drag differently on either side of the aircraft.

Vmc, or minimum control speed with the critical engine inoperative, is a vital parameter that defines the minimum speed at which the aircraft can be controlled with one engine inoperative. It is essential for understanding how to manage the aircraft's attitude and control when facing engine failure.

Torque, produced by the operating engine, also contributes to the aircraft's response upon engine failure, as it can cause a turn towards the inoperative engine and require proper handling to maintain control.

In contrast, while throttle position does influence engine power output, it does not specifically relate to the performance characteristics of the aircraft in the critical engine-out scenario as the other factors do.