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Trump's dream of a F-55 twin-engine fighter jet is thrown into doubt

According to two sources familiar with the issue, President Donald Trump may have to scale back his vision for a new twin-engine Lockheed Martin F-35 fighter plane due to engineering and cost realities.

In Doha, Trump stated that the "F-55" will have "two engines" and "a super upgrade over the F-35." Trump did add a condition, saying "if we can get the best price."

The two sources, who spoke on condition of anonymity because the issue was sensitive, said that Trump had not been shown a twin-engine redesign. The sources claimed that developing such a jet required a massive overhaul costing billions of dollar and taking many years.

Lockheed Martin briefed Trump about a possible upgrade for the F-35 in multiple meetings prior to the Doha event. The proposal consisted of just one "advanced engine", a redesigned fuselage and nose, as well as a new sensor system.

Trump's mention of the "F-55" designation of the jet caught officials and insiders by surprise, especially the mention of its twin engines. Trump has stated that he prefers this feature for safety, in the event of an engine failure.

According to two industry sources and two experts, Lockheed is exploring two new variants of fighter jets.

The F-55 proposal is a response to the intensifying competition in global military aviation. China continues to develop its J-36 stealth fighters and J-50 stealth bombers at a rapid pace, while Russia is advancing its Su-57 program in spite of economic constraints.

Lockheed's response to Trump's remarks in Doha was measured. "We thank President Trump, for his support for the F-35, and F-22, and we will continue to work with the Administration, to realize their vision of air dominance."

According to TD Cowen, a Wall Street analyst who is tracking what could replace Lockheed Martin’s F-35 said, "it sounds as though Trump has asked DoD for a twin-engine version of the F-35 if we can get the best price."

Two engines?

The F-55 would need to be redesigned with two engines, which would cost a lot of money and take a long time. While it would speed up the jet, it would also delay its production for years.

Lockheed CEO James Taiclet had told investors in an April call that the company was exploring a "fifth-generation-plus" fighter concept that would apply technologies developed for its unsuccessful F-47 bid to enhance the F-35 platform.

The people who spoke to me said that the F-55 would be much more difficult to export with the new technologies, and they still remain highly controlled.

Taiclet, an analyst in April, said that he would "basically take the chassis and make it into a Ferrari". He claimed this approach could provide 80% of the next-generation capabilities at a half price.

Boeing won the contract to build the Next Generation Air Dominance, now called the F-47. This will be America's sixth-generation fighter aircraft and is intended to replace Lockheed Martin F-22 Raptor.

PRODUCTION Lockheed is able leverage its production plans to produce new jets because it lost the NGAD competition.

The people claimed that Lockheed already had production space lined up and informed the president of the readiness to move forward. One person said that Lockheed was much farther along than the president realized.

The F-55's announcement is a timely one, and raises some questions as to how it fits in with existing budgets and plans for defense procurement. The Pentagon already manages multiple high-cost aircraft programs, such as the F-35, F-47, and possibly the Navy's F/A-XX next-generation carrier-based fighter plane.

Lockheed Martin's F-55 concept is a crucial opportunity to remain relevant in the high-end market for fighter aircraft after suffering significant setbacks during the next-generation competitions.

The F-55 and Boeing's NGAD are expected to surpass the F-22 in terms of capabilities. (Reporting and editing by Diane Craft in Washington, and Chizu Nomiyama.)

(source: Reuters)