The PT6A engine family continues to advance, incorporating the latest technologies in the drive to exceed our customers’ expectations in performance, reliability, durability, fuel consumption and environmental friendliness. More than 65 PT6A models have been produced, ranging in shaft horsepower power from 500 shp to 2,000 shp. New aerodynamic and material technologies have enabled the PT6 engine to gain more power without significantly increasing in size. Other innovations have reduced emissions, increased maintenance intervals and further enhanced ease of operation with the introduction of digital electronic control to small gas turbine engines.
The novel PT6A configuration has proven a key attribute to its success: its rearward, reverse flow inlet and forward facing turbine section providing fast maintenance turn-around through on-wing hot section refurbishment in most aircraft installations. The PT6A is a two-shaft engine with a multi-stage compressor driven by a single-stage compressor turbine and an independent shaft coupling the power turbine to the propeller through an epicyclic concentric reduction gearbox.
The PT6A family of engines embodies three series of models with increasing power levels, referred to as PT6A ‘Small’, ‘Medium’ and ‘Large.’ The increased power levels are achieved through the increase of compressor air flow and increased number of power turbine stages. Most recent models enjoy the advantage of additional advanced technologies in materials, turbine cooling and aerodynamic design.
Multi- stage axial and single-stage centrifugal compressor
- Reverse flow, radial inlet with screen for FOD (Foreign Object Damage) protection
- Large PT6A models incorporate 4-stage axial and 1-stage centrifugal
- Small and Medium PT6A models incorporate 3-stage axial and 1-stage centrifugal
