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Gross thrust differs from net thrust in that gross thrust

  • A.Ignores the momentum of the air entering the engine
  • B.Includes the drag of the nacelle
  • C.Is measured only in flight
  • D.Excludes the pressure term at the nozzle

Answer: A

Gross thrust is what the nozzle produces, and subtracting the ram drag of the incoming air gives the net thrust the aircraft actually feels. The two are equal only at rest, which is why a static thrust figure overstates what is available in flight.

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