PARIS—A key milestone for the Pentagon’s program to upgrade the F-35 engine has been pushed back a year, raising questions about the overall timeline of the effort. The engine upgrade will reach ...

The U.S. Dept. of Defense made a $2.88-billion award to Pratt & Whitney in a modification to a prior contract for manufacturing 141 more F135 engines. Those engines are the power source for the F-35 ...

Trump wants an F-35 stealth fighter with two engines because he doesn't like single-engine planes. He wants to call this new twin-engine F-35 the F-55. A former F-35 program manager told BI that this ...

The F-35 Joint Strike Fighter program is scaling back its ambitions for a slate of upgrades called Block 4, the Government Accountability Office said Wednesday, as the aircraft struggles with ...

If you are an investor in United Technologies stock -- or in Lockheed Martin for that matter -- I've got some good news for you, and some bad news, too. The good news: As of today, it's been more than ...

Trump proposed upgrading the F-35 to a twin-engine F-55 and modernizing the F-22 to a “Super” F-22. Aviation experts question the feasibility of these upgrades. While speaking on Thursday in Doha, ...

The $2.8B contract funds 141 F135 engines for U.S. services and allies, securing production, spares, and upgrades through February 2028. Pratt & Whitney has been awarded a major contract, valued at ...

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The U.S. has long been recognized for its technological edge in developing battlefield weaponry. The design work for such platforms occurs years before a system ever sees the light of day and, even ...

Add Yahoo as a preferred source to see more of our stories on Google. The F-35 program is delaying some of its planned Block 4 upgrades as it focuses on delivering capabilities as early as 2031. (A1C ...