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A fixed shaft or direct drive turboprop has

  • A.A separate uncoupled power turbine
  • B.No reduction gearbox
  • C.Two independent gas generators
  • D.The propeller geared to the gas generator

Answer: D

Everything turns together, so the starter must accelerate the propeller as well as the compressor. The arrangement responds quickly to power changes but demands more from the starter and from the control system at low speed.

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