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Discussion

Consider the following pairs of cost element and its principal driver:

Engineering hours - Empty weight and maximum speed

Tooling cost - Production rate and empty weight

Engine cost - Thrust and turbine inlet temperature

Fuel cost - Empty weight alone

How many of the pairs given above are correctly matched?

  • A.Only three
  • B.Only one
  • C.Only two
  • D.All four

Answer: A

The first three name their drivers correctly. Fuel cost follows the mission, the aerodynamic efficiency and the fuel price as well as the weight, and no single design variable governs it in the way weight governs the others.

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