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Which load case is most often critical for the wing structure of a large transport?

  • A.Ground taxiing at low speed
  • B.Cabin pressurisation
  • C.Engine start torque
  • D.The 2.5 g manoeuvre or the gust case

Answer: D

The wing is sized by the largest bending moment it must carry, which comes from the positive manoeuvre limit or from a severe gust at high weight, whichever proves greater. Pressurisation governs the fuselage instead, and ground loads govern the gear and its attachments.

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