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Thrust reversers on a high-bypass turbofan most commonly work by

  • A.Deploying a drag chute
  • B.Turning the fan flow with a cascade
  • C.Reversing the core flow only
  • D.Reversing the propeller pitch

Answer: B

The fan stream carries most of the mass flow, so turning it is where the retarding force is. Cascade or blocker-door arrangements are the norm, and the core stream is usually left alone entirely on a modern high-bypass installation.

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