What contributes to the turning effect in an aircraft when operating at high power settings?

The turning effect in an aircraft during high power settings is primarily influenced by the torque reaction of the engine and propeller. When the engine produces power, the rotating propeller creates a reaction torque that causes the aircraft's airframe to tend to rotate in the opposite direction. This is particularly noticeable in single-engine aircraft, where the asymmetrical thrust from the propeller can lead to a tendency to roll towards the side opposite the propeller's rotation.

Furthermore, as power is increased, the torque effect becomes more pronounced, which is why pilots must be prepared to apply correct rudder input to counteract this tendency and maintain coordinated flight. While other factors, such as weight, drag, and adverse yaw, do play roles in aircraft performance and control, the torque reaction directly contributes to the turning effect encountered when operating at high power settings.