Which factor is NOT associated with torque reaction on an aircraft?

Torque reaction refers to the tendency of an aircraft to roll or yaw in the opposite direction of its propeller's rotation. This phenomenon is a consequence of Newton's third law of motion, which states that for every action, there is an equal and opposite reaction.

In the context of the choices provided, the correct answer identifies a factor that does not pertain to the direct effects of torque reaction. During a climb, the pitch adjustment is primarily influenced by the aircraft's angle of attack and airspeed rather than torque reaction. While torque can cause a roll or yaw during other phases of flight, the act of adjusting the pitch for climb is more closely related to aerodynamic forces acting on the aircraft, such as lift and drag, not a rotational effect from the propeller.

The other options directly relate to torque reaction effects:

• A roll to the left due to clockwise propeller rotation illustrates how torque can induce a roll in the opposite direction of the propeller's spin.

• Yawing to the left while on the ground demonstrates the ground effect of torque reaction, where the propeller's rotation influences directional control.

• Rolling the aircraft opposite to the prop direction is a pilot's counteraction to maintain level flight in the face of induced torque from