General Electric T64

The General Electric T64 is a free-turbine turboshaft engine that was originally developed for use on helicopters, but which was later used on fixed-wing aircraft as well.

The original engine design included technical innovations such as corrosion resistant and high-temperature coatings.

[1] The engine features a high overall pressure ratio, yielding a low specific fuel consumption for its time.

[2] Although the compressor is all-axial, like the earlier General Electric T58, the power turbine shaft is coaxial with the HP shaft and delivers power to the front of the engine, not rearwards.

[3] The engine was designed to accommodate different gearboxes or shaft drives, for helicopter or turboprop fixed-wing applications.

side view of a helicopter with the engine bay open, displaying engine internals
T64-GE-7 installed on Sikorsky CH-53G helicopter