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__________ ratio is the mass flow through the fan duct divided by the mass flow through the core.

  • A.Bypass
  • B.Pressure
  • C.Compression
  • D.Equivalence

Answer: A

Raising it improves propulsive efficiency and reduces jet noise because more air is accelerated more gently. The cost is a larger and heavier nacelle with more drag, which is the balance every engine designer has to settle for a given aircraft.

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