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Washout, a nose-down twist towards the tip, is applied so that

  • A.The tip stalls before the root
  • B.The wing produces more lift at the tip
  • C.The wing's structural weight is reduced
  • D.The root stalls first, keeping the ailerons

Answer: D

Reducing the tip incidence keeps those sections further from their stalling angle, so separation starts inboard and spreads outward. Tapered wings need it particularly, since taper alone loads the tip more heavily relative to its chord.

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