The Pratt & Whitney Canada PT6A turboprop, one of the longest-running product lines in business, general, and military aviation, may finally be getting an electronic engine control. The powerplant entered service in the early 1960s and until now has always been managed with hydromechanical engine controls. Not that this has been a handicap for the PT6A, more than 47,000 units of which have been produced in 71 models in power ratings ranging from 500 to 1,900 shaft horsepower for 128 ...

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