Pratt & Whitney F100

F100
Testing an F100 for an F-15 Eagle
Type Turbofan
National origin United States
Manufacturer Pratt & Whitney
First run 1970s
Major applications F-15 Eagle
F-15E Strike Eagle
F-16 Fighting Falcon
Northrop Grumman X-47B
Developed into Pratt & Whitney F401
Pratt & Whitney PW1120

The Pratt & Whitney F100 (company designation JTF22) is a low bypass afterburning turbofan engine. It was designed and manufactured by Pratt & Whitney to power the U.S. Air Force's "FX" initiative in 1965, which became the F-15 Eagle. The engine was to be developed in tandem with the F401 which shares a similar core but with an upscaled fan for the U.S. Navy's F-14 Tomcat. The F401 was later abandoned due to costs and reliability issues. The F100 also powered the F-16 Fighting Falcon for the Air Force's Lightweight Fighter (LWF) program.