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The principal aerodynamic reason for giving a supersonic aircraft a slender, pointed nose is to

  • A.Reduce the skin-friction drag
  • B.Move the aerodynamic centre forward
  • C.Keep the bow shock attached and weak, reducing wave drag
  • D.Increase the maximum lift coefficient

Answer: C

A slender nose asks for a small flow deflection, which an attached, weak oblique shock can supply, and the wave drag that follows is small. A blunt nose forces a detached bow shock with a strong nearly normal portion and a large drag penalty, which is acceptable only where heating governs, as on a re-entry capsule.

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