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Wind-tunnel testing of a new transport aircraft is typically used to

  • A.Determine the aircraft's structural strength
  • B.Measure the engine's fuel consumption
  • C.Validate computations and certify performance
  • D.Replace all computational work

Answer: C

A modern programme computes far more configurations than it could ever test, then uses the tunnel to anchor those computations and to produce the data the certification authorities require. Structural strength and engine performance are established on entirely separate rigs.

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