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A fuselage designed with stretch in mind typically has

  • A.A shorter than optimal cabin
  • B.No commonality with its derivatives
  • C.A smaller diameter than needed
  • D.Margin at the wing and gear attachments

Answer: D

Stretching adds weight and moves the centre of gravity, so the carry-through, gear and attachment structure must be able to absorb it. Designing the first variant slightly strong there is far cheaper than redesigning later.

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