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A cost model calibrated on metal airframes will typically

  • A.Estimate composites correctly without adjustment
  • B.Be unusable for any new aircraft
  • C.Underestimate the cost of a composite airframe
  • D.Overestimate the cost of a composite airframe

Answer: C

Composite manufacture carries different tooling, cure and inspection costs that the historical correlations never saw, and complexity factors are applied to compensate. Uncalibrated use of an old model is a classic source of error.

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