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A multi-spar wing differs from a two-spar wing in that it

  • A.Has no skin
  • B.It uses several spanwise spars
  • C.Uses no ribs at all
  • D.Carries no torsion

Answer: B

Distributing the material among several spars shortens the skin panels and provides alternative load paths, which suits thin, highly loaded wings such as those on fast military aircraft. A transport wing generally uses two or three spars and relies on stringers instead.

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