TPE331

The TPE331 is a turboprop engine manufactured by Honeywell Aerospace. It is a widely used engine for a variety of aircraft, particularly those in the general aviation, regional airline, and military sectors. Development of the TPE331 began in the early 1960s, with its first flight in 1963. Over the years, it has undergone numerous upgrades and variants, known for its reliability and fuel efficiency.

The TPE331 is a free-turbine engine, meaning the power turbine is mechanically independent of the gas generator turbine. This design allows for excellent propeller control and responsiveness. The engine typically features a five-stage axial compressor and a single-stage turbine for the gas generator, followed by a two-stage power turbine. Its compact size and relatively low weight contribute to its suitability for smaller and medium-sized aircraft.

Common applications for the TPE331 include aircraft like the Beechcraft King Air, CASA 212, and the Aerocommander AC-117. It has also been used in military trainer aircraft and unmanned aerial vehicles. The engine's modular design facilitates easier maintenance and overhaul. Honeywell continues to support and develop the TPE331 family, ensuring its continued relevance in the aviation industry.