What measure is taken to ensure the artificial feel in the Force Trim Actuators?

• A. Electric motor
• B. Magnetic clutch
• C. Torsion spring
• D. Control stick

Answer: (C)

The use of a torsion spring in the Force Trim Actuators is crucial for creating an artificial feel that mimics the resistance and feedback typically experienced in a traditional control system. Torsion springs work by providing a resistance force that opposes the movement of the control stick, allowing pilots to perceive the aerodynamic forces acting on the aircraft through tactile feedback. This sensation enhances pilot situational awareness and control by making it easier to perceive and respond to changes in aircraft dynamics.

In practice, when the pilot maneuvers the control inputs, the torsion spring applies a specific amount of resistance that adjusts in proportion to the movement, thereby simulating the natural feel of the aircraft. This design contributes to improved handling characteristics, as pilots can rely on the feedback from the control stick to make precision adjustments during flight.

While electric motors, magnetic clutches, and control sticks have their own functions in aircraft systems—such as providing actuation, engaging or disengaging mechanical components, or translating pilot commands—none of these components are specifically designed to replicate the nuanced feedback and resistance that a torsion spring provides, which is essential for achieving the artificial feel sought in Force Trim Actuators.