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Which statement about interference drag in a podded installation is FALSE?

  • A.It arises from the channel between the nacelle and the wing
  • B.Pylon length and nacelle position are chosen to reduce it
  • C.An overwing pod generally suffers more of it
  • D.It is eliminated entirely by a sufficiently long pylon

Answer: D

A longer pylon reduces the interference but never removes it, and beyond a point it costs weight and wetted area of its own. The remaining statements are all correct descriptions of how the installation is actually shaped.

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