The Pratt & Whitney Canada PT6A-65B is the exact turboprop identified by the U.S. Air Force for the C-12J Huron passenger and cargo airlift aircraft. The PT6A architecture uses reverse flow, a multi-stage compressor, a single-stage compressor turbine, an independent free power turbine, and an epicyclic reduction gearbox; the structured model rating is 874.2 kW, normalized from the Air Force source value of 1,173 shaft horsepower.