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Static longitudinal stability describes an aeroplane's

  • A.Initial tendency to return towards trim after a pitch disturbance
  • B.Eventual motion over many oscillations
  • C.Ability to be trimmed at any speed
  • D.Response to a control input

Answer: A

Static stability concerns only the direction of the initial response, not whether the subsequent motion converges. An aeroplane can be statically stable and dynamically unstable, so the two properties must always be assessed separately.

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