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Net thrust is gross thrust minus the __________ of the incoming air.

  • A.pressure thrust
  • B.nacelle drag
  • C.spillage drag
  • D.ram drag

Answer: D

The engine must first cancel the momentum the air already carried in the flight direction. Ram drag is zero at rest and grows with speed, which is precisely why a static thrust figure overstates what the aircraft actually receives in flight.

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