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A design team moves the engines from the wing to the rear fuselage late in the programme.

Which consequence must now be re-examined first?

  • A.The thrust reverser type
  • B.The accessory gearbox layout
  • C.The centre of gravity and tail sizing
  • D.The inlet pressure recovery

Answer: C

Two heavy engines moving far aft shifts the centre of gravity and changes what the tail must do, and a T-tail usually becomes necessary as well. Wing bending relief is lost at the same time, so the wing structure itself grows heavier.

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