THE PT6 ENGINE - 30 YEARS OF GAS-TURBINE TECHNOLOGY EVOLUTION

The PT6 engine entered service in the mid-1960s. Since then, applicati on of new technology has enabled low-cost development of engines appro aching 1500 kW, the introduction of electronic controls, improved powe r-to-weight ratio, higher cycle temperature, and reduced specific fuel consumption. At the same time, PT6 field experience in business, comm uter, helicopter, and trainer applications has resulted in engines wit h low Direct Operating Cost and a reputation for rugged design and a h igh standard of engine reliability. This paper will highlight some int eresting examples of this technical evolution, including the developme nt of electronic controls and the application of the latest three-dime nsional aerodynamic and stress analysis to both compressor and turbine components.