Tilting The PT6C-67A Turboshaft For The AW609

Configuration of the PT6C-67A is typical of the PT6 line: five-stage compressor, reverse-flow annular combustion, single-stage HP turbine, and two-stage LP turbine.
Credit: Pratt & Whitney Canada
For the Leonardo AW609 tiltrotor application, Pratt & Whitney Canada had to modify its PT6C turboshaft so that it could operate through a 95-deg. arc at high-power settings. The resulting variant was the Dash 67A engine that received reciprocal FAA, Canadian Transportation Department, and EASA...

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