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A high-wing aircraft usually needs less geometric dihedral than a low-wing one because

  • A.Low wings cannot use dihedral
  • B.The high wing position is itself stabilising
  • C.High wings are structurally stiffer
  • D.High wings have more area

Answer: B

Flow around the fuselage in a sideslip adds an effective dihedral for a high wing and subtracts it for a low one. Many high-wing transports therefore use little or even anhedral, while low-wing aircraft carry several degrees.

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