General Electric/Rolls-Royce F136

The General Electric/Rolls-Royce F136 was an afterburning turbofan engine being developed by General Electric, Allison Engine Company, and Rolls-Royce (Allison was subsequently acquired by Rolls-Royce) as an alternative powerplant to the Pratt & Whitney F135 for the Lockheed Martin F-35 Lightning II. The two companies stopped work on the project in December 2011 after failing to gather Pentagon support for further development. == Development == In the initial plans for Joint Strike Fighter (JSF) program, all early JSFs were to be powered by an engine derived from Pratt & Whitney's F119 turbofan intended for the F-22 Advanced Tactical Fighter (ATF), but it was planned that engine contracts would be competitively tendered from Lot 6 onward.

Source: Wikipedia — General Electric/Rolls-Royce F136 (CC BY-SA 4.0)