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Old 23rd Feb 2017, 00:59
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tail wheel

Victim of a bored god

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Join Date: Jan 1996
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Single shaft turbines can also be restarted this way, because th prop torque is directly coupled to the compressor rotor. With a two- or three-shaft machine, no such luck, although the engine starter may be used.
The Pratt & Whitney PT6A-41/42 turbine installed in a King Air is a free turbine, not a fixed or single shaft turbine. The propeller and power turbine are not mechanically connected to the Compressor Turbine and Compressor.
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