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Why is breakout force specified with an upper limit as well as a lower one?

  • A.Too much of it causes flutter
  • B.Too little of it reduces control effectiveness
  • C.It has no effect on handling
  • D.Too much of it masks the force gradient near neutral

Answer: D

A large breakout force swamps the gradient around neutral, so the pilot cannot feel small displacements and tends to over-control; too little leaves the control feeling loose and the aeroplane vulnerable to inadvertent inputs. It is not a flutter mechanism, which depends on mass and stiffness rather than friction, and it does not change the surface's aerodynamic effectiveness at all. Handling is precisely what it affects, which is why both bounds exist.

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