The General Electric T64 is a free-turbine turboshaft engine that was developed for use on helicopters. GE introduced the engine in 1964. The original engine design included technical innovations such as corrosion resistant and high-temperature coatings. The engine features a high pressure ratio, yielding low specific fuel consumption.
Later versions of the engine produce from 3,925 to 4,750 shp (2,927 to 3,542 kW).
The engine is also used in several turboprop fixed-wing applications.