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Why is the gas coupled (free turbine) Turbo shaft favored over the gear coupled turbo shaft engine?

April 26, 2017aircraft cars Coupled Free Gas Transportation turbine TURBO

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Why is the gas coupled (free turbine) Turbo shaft favored over the gear coupled turbo shaft engine?

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On start up, a gear coupled turbo shaft would require driving whatever it is the engine is to drive to nearly operational speed, or to have a clutch capable of engaging at high speed, not the best and most reliable configuration in certain cases.