Pratt & Whitney F135

F135
An F135-PW-100 powerplant on display at Royal Australian Air Force Centenary of Military Aviation 2014
Type	Turbofan
Manufacturer	Pratt & Whitney
Major applications	Lockheed Martin F-35 Lightning II
Unit cost	F135-PW-100, US$ 13.3M per LRIP 9 F135-PW-600, US$ 19.05M
Developed from	Pratt & Whitney F119

F135-PW-600, US$ 19.05M

The Pratt & Whitney F135 is an afterburning turbofan developed for the Lockheed Martin F-35 Lightning II single-engine strike fighter. The F135 family has several distinct variants, including a conventional, forward thrust variant and a multi-cycle STOVL variant that includes a forward lift fan. The first production engines were scheduled to be delivered in 2009.

The origins of the F135 lie with the Lockheed Corporation Skunk Works's efforts to develop a stealthy STOVL strike fighter for the U.S. Marine Corps under a 1986 DARPA program. Lockheed employee Paul Bevilaqua developed and patented a concept aircraft and propulsion system, and then turned to Pratt & Whitney (P&W) to build a demonstrator engine. The demonstrator used the first stage fan from a F119 engine for the lift fan, the engine fan and core from the F100-220 for the core, and the larger low-pressure turbine from the F100-229 for the low-pressure turbine of the demonstrator engine. The larger turbine was used to provide the additional power required to operate the lift fan. Finally, a variable thrust deflecting nozzle was added to complete the "F100-229-Plus" demonstrator engine. This engine proved the lift-fan concept and led to the development of the current F135 engine.

P&W developed the F135 from their F119 turbofan, which powers the F-22 Raptor, as the "F119-JSF". The F135 integrates the F119 core with new components optimized for the JSF. The F135 is assembled at a plant in Middletown, Connecticut. Some parts of the engine are made in Longueuil, Quebec, Canada, and in Poland.

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Wikipedia