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The cost of an aircraft engine in a parametric model is usually estimated from

  • A.The passenger count
  • B.Thrust and turbine inlet temperature
  • C.The aircraft's empty weight
  • D.The wing area

Answer: B

Engines are costed on their own parameters rather than the airframe's, since they are bought in as complete units. Turbine inlet temperature stands in for the technology level and hence for the difficulty of building it.

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