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A turboprop delivers most of its output as

  • A.Shaft power to a propeller through a reduction gearbox
  • B.Jet thrust from the propelling nozzle
  • C.Electrical power to the airframe
  • D.Compressed air for the cabin

Answer: A

The turbine extracts nearly all the available energy to the shaft, leaving perhaps five to ten per cent as residual jet thrust. That division is the essential difference from a turbojet, where the whole of the energy leaves as jet momentum.

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