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The mean aerodynamic chord is used as a reference because

  • A.Positions quoted on it transfer between aircraft
  • B.It is the longest chord on the wing
  • C.It is where the wing is thickest
  • D.It marks the wing tip

Answer: A

Quoting a centre of gravity at twenty-five per cent of mean aerodynamic chord means the same thing whatever the aircraft's size, so limits and margins can be compared directly. It is the chord of an equivalent rectangular wing with the same moment behaviour.

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