Similar to the -21 model except has a PT6A-136 Reduction Gear Box.
The PT6A -121 engine model by Pratt and Whitney Canada is a small variant of the popular PT6 engine family. Ever reliable and cost effective, the PT6 engine has been flying since the 1960's. It has been continuously improved since inception and this version gives 615 shaft horsepower at take-off, producing 1900 rpm. As with all 100 series engines in the PT6A range, the engine is controlled by hydro mechanical fuel control system and consists of a 2 stage Reduction Gearbox. The gearbox design is common for all 100 series engines in the range. The capabilities for this PT6 engine include;
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