Discussion
Statement I: Fully powered controls require an artificial feel system.
Statement II: The hydraulic actuator isolates the pilot from the aerodynamic hinge moments.
In the light of the above statements, choose the correct answer.
Answer: C
Correct answer: Both Statement I and Statement II are correct
Both are true and the second explains the first. With a hydraulic actuator between the stick and the surface, the pilot moves a valve rather than the elevator, so none of the aerodynamic hinge moment reaches the hand.
Without feel there would be nothing to signal how much control was being applied, and gross overcontrol at high speed would be easy. Artificial feel supplies it: a q-feel unit stiffening the stick with dynamic pressure, springs for centring, and a bob weight adding force with normal acceleration.
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