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The critical section of a wing for strength is normally

  • A.At the tip, where the loads are smallest
  • B.At mid-span in every case
  • C.Wherever the wing is thickest
  • D.Near the root, where the loads peak

Answer: D

Both shear and bending accumulate towards the root, so the root section carries the largest loads and usually sets the sizing. The relief from inertia and the increase in structural depth moderate it but do not reverse the trend.

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