Engine Overview
The TF39, the world's first high-bypass turbofan engine, was developed in response to the United States Air Force's desire for a new transport aircraft. The high-bypass turbofan was a giant leap in aircraft engine design, offering high thrust levels (43,000 pounds) and revolutionary fuel efficiency. The TF39 included such pioneering technological accomplishments as an 8-to-1 bypass ratio, 25-to-1 compressor pressure ratio, a 2,500°F turbine temperature made possible by advanced cooling techniques, and a GE-designed thrust reverser. Its fan, compressor, combustor, turbine, and exhaust system were almost perfectly matched, and each system was significantly more efficient than its predecessors. The TF39 was selected to power the Air Force's new transport, which turned out to be the gigantic Lockheed C-5 Galaxy.
GEAE was awarded the contract by the US Air Force to develop the TF39 in 1965. The first engine went to test the same year. Between 1968 and 1971, 463 TF39-1 and -1A engines were produced and delivered to power the C-5A fleet.
The TF39 became the parent of GE's highly successful CF6 family of commercial engines for widebody aircraft. In addition, it has gone to sea in the form of the derivative LM2500 marine and industrial engine. Since introduction, the TF39 has benefited directly from CF6 design technology -- components, materials, processes, manufacturing techniques, and repair processes.
