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A design that falls outside the range of the historical data used to size it

  • A.Treated with caution; it extrapolates
  • B.Is automatically better than conventional designs
  • C.Cannot be analysed at all
  • D.Requires no further checking

Answer: A

Regressions describe the aircraft that were built, not the ones that could be. A blended wing body or a strut-braced wing sits outside the sample and needs physics-based estimation instead, which is slower and less certain.

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