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Which of these is NOT a reason a strut-braced wing is attractive?

  • A.It reduces induced drag through greater span
  • B.It offers a route to lower fuel burn
  • C.It eliminates the wing's bending moment entirely
  • D.It permits a higher aspect ratio for the same weight

Answer: C

Correct answer: It eliminates the wing’s bending moment entirely

A strut does not eliminate the bending moment; it provides an intermediate support that greatly reduces the root bending moment, which is a different and more modest claim. The genuine attractions are the other three: for a given structural weight the wing can be given a much higher aspect ratio, the greater span cuts induced drag, and the combination offers a route to significantly lower fuel burn - at the cost of the strut’s own interference drag and its junction design.

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