TurboProps PT6A Small

The small PT6 is a lightweight turboprop reverse-flow engine providing a power range from 580 to 920 shaft horsepower (ESHP).

It is the most popular gas turbine engine in its class. Since production started in 1964, more than 60 versions of the PT6 engine have been certified.

The engine is installed in many different aircraft models used for corporate, regional/commuter, utility and agricultural applications. The PT6 also powers most turboprop trainers in operation or in development in the Western World. In these applications, the engine features a special oil system for inverted flight.

The ST6 version is used for industrial, commercial and marine applications. These include Auxiliary Power Units (APU), pumping stations for gas and oil pipelines, marine propulsion systems for ships, and air cushion vehicles, electrical generators and for co-generation.

Operation
The air enters the engine through the inlet screen; it is then compressed by a multi-stage compressor and fed to the combustion chamber where it is mixed with fuel and ignited. The hot gas expands through two turbine stages; the first drives the compressor and the accessories; the second, mechanically independent from the first, drives the propeller shaft by means of a reduction gearbox. Finally, the hot gas is discharged through the exhaust ducts.

Pratt & Whitney Canada Corp., 1000 Marie Victorin Blvd, Longueuil, PQ J4G 1A1. Tel: 800-268-8000; Fax: 450-647-7588.