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General Electric F110

History

The General Electric F110 is a low-bypass afterburning turbofan developed for tactical fighter aircraft. It grew from General Electric work based on the F101 engine originally developed for the B-1 bomber and became a major alternative fighter powerplant for the F-14, F-15 and F-16 families.

The engine entered continuous production in 1984 after the U.S. Department of Defense awarded General Electric a contract to power future fighter aircraft. Four decades later, GE Aerospace reported more than 11 million accumulated flight hours and continued production for U.S. and allied combat aircraft.

The F110 family has continued to evolve through new variants, component improvements, service-life upgrades and experimental applications. In 2026, Shield AI and GE Aerospace were testing an F110-GE-129E fitted with the Axisymmetric Vectoring Exhaust Nozzle for the X-Bat collaborative combat aircraft program.

Development

General Electric began privately developing the F101X in 1975 as a fighter-oriented derivative of the F101. The design retained much of the F101 core while using a smaller fan derived from the F404. Development was intended to produce a fighter engine with a suitable combination of thrust, operability and durability.

The U.S. Air Force began funding the design in 1979 through the Engine Model Derivative Program, where it became the F101 Derivative Fighter Engine. Ground testing was completed in 1980, followed by flight testing in an F-16. The derivative was also tested in an F-14 prototype in 1981.

In 1982, the Air Force began full-scale development of the engine as an alternative to the Pratt & Whitney F100 for future F-15 and F-16 production. The resulting competition became known as the Alternate Fighter Engine program or the “Great Engine War.” The Air Force began buying both competing engine families in 1984, with annual contracts competed between General Electric and Pratt & Whitney. The competition continued until 1992. Background information on this development history is available from GE Aerospace and the F110 reference overview.

The fighter derivative selected for the F-16 became the F110-GE-100. The U.S. Navy selected the derivative for future F-14 aircraft in 1984, resulting in the longer F110-GE-400 configuration.

Improved Performance Engine development

During the mid-1980s, the U.S. Air Force sought greater engine output through its Improved Performance Engine program. General Electric responded with the F110-GE-129. The new variant retained about 80 percent commonality with the F110-GE-100 while incorporating component improvements and full-authority digital engine control. It was first fielded on the F-16C/D Block 50 in 1992 and was later used by enhanced F-15 variants.

GE Aerospace has continued modifying the engine family during its production life. The company stated in 2024 that 92 percent of F110 parts had undergone some form of design change involving materials, coatings, manufacturing methods or inspection processes. F110-GE-129 and F110-GE-132 engines have also received Service Life Extension Program hardware incorporating updated cooling and durability technologies.

Thrust-vectoring development

General Electric developed the Axisymmetric Vectoring Exhaust Nozzle, or AVEN, for experimental F-16 thrust-vectoring work during the 1990s. The system allowed the exhaust direction to move on both vertical and horizontal axes. Earlier AVEN testing accumulated 73 hours of ground operation and 135 flight hours during 95 sorties.

In 2026, Shield AI and GE Aerospace integrated an AVEN system with an F110-GE-129E for the X-Bat collaborative combat aircraft. The companies completed integration, actuation work and engine light-off testing before continuing ground trials. The nozzle is intended to provide the thrust-vectoring authority needed for X-Bat vertical takeoff and landing and to increase maneuverability in horizontal flight. Details of the integration were reported by Aviation Tech Today.

Later stand tests took place at GE's Peebles, Ohio test site. Video released by Shield AI showed the modified turbofan operating on an outdoor overhead thrust stand while AVEN actuators moved the exhaust nozzle. The X-Bat prototype is planned to use one thrust-vectoring F110 and a mobile rail system for vertical launch and recovery.

Design

The early F110-GE-100 and F110-GE-400 configurations are axial-flow, low-bypass afterburning turbofans. They use a three-stage fan driven by a two-stage low-pressure turbine and a nine-stage compressor driven by a single-stage high-pressure turbine. The reported overall pressure ratio is 30.4 and the bypass ratio is 0.87.

The engine was designed with emphasis on a balance of performance, reliability and operability. The fan and inlet guide vanes were developed to manage airflow and improve resistance to compressor stalls. Early versions combined electronic and hydromechanical engine controls to tolerate rapid throttle movement more effectively.

The F110-GE-400 differs from the F110-GE-100 primarily in its augmentor section, which is approximately 1.27 m longer. The longer configuration was developed for the F-14 installation.

F110-GE-129

The F110-GE-129 introduced a full-authority digital engine control system and additional component improvements. Its bypass ratio was reduced to 0.76. The changes allowed maximum thrust to be available across a wider range of operating conditions and a larger portion of the aircraft flight envelope while retaining substantial commonality with the earlier F110-GE-100.

Maintenance and service-life improvements

GE Aerospace reported an average time on wing of about 750 hours for the F110 family after continuing durability and maintenance improvements. The manufacturer also stated that the engine is designed so that 90 percent of maintenance can be performed while installed on the aircraft or at an on-site maintenance facility rather than at a central depot.

Service Life Extension Program hardware for the F110-GE-129 and F110-GE-132 has incorporated improved cooling technology and longer-life rotating components. GE Aerospace has also tested modified F110 hardware through accelerated mission testing intended to validate further durability and capability improvements.

Operational history

The F110 entered continuous production in 1984 and has powered multiple generations of U.S. and allied fighter aircraft. GE Aerospace stated in 2024 that the engine family had accumulated more than 11 million flight hours and was powering F-15 and F-16 aircraft for the U.S. military and aircraft in 16 allied nations.

The F110-GE-400 was adopted for later F-14 aircraft, while the F110-GE-100 became associated with F-16C/D production. The more powerful F110-GE-129 was introduced on the F-16C/D Block 50 and was subsequently selected for enhanced F-15 versions. GE Aerospace identified the F-15EX and Türkiye's Kaan fighter among newer aircraft using the F110-GE-129.

Licensed production has also been associated with companies in Japan, Turkey and South Korea. Additional historical and technical information is compiled in the AviationSafetyX F110 overview.

Variants

F110-GE-100: Fighter-engine version selected for the F-16. It formed one of the principal early production configurations of the F110 family.
F110-GE-400: Version developed for the F-14, with an augmentor section approximately 1.27 m longer than that of the F110-GE-100.
F110-GE-129: Improved Performance Engine variant with full-authority digital engine control, component improvements and increased thrust. It was first fielded in 1992 on the F-16C/D Block 50 and later used on enhanced F-15 variants.
F110-GE-129E with AVEN: Experimental thrust-vectoring configuration being tested by GE Aerospace and Shield AI for the X-Bat collaborative combat aircraft.
F110-GE-132: Later F110 variant identified by GE Aerospace as receiving Service Life Extension Program hardware upgrades.