UK next gen fighter

[zhangmdev]

He is talking about the heat sink used in ground testing. Obviously you cannot reject heat by boiling water or liquid nitrogen in a flight system. The question is can you use the hydrocarbon fuel loop as the heat sink? If the answer is yes, show it can work on ground, then move on to a flight system. So far there are only current thoughts and near-term goals.

[XanderCrews]

Theyre making big promises to get funding. Thats all this "boils" down to.

[hkultala]

Wrong. The technology can be applied to a jet engine as well. Read the link.

Wrong. Please learn to read.

Jet engine and hydrogen fuel are not contradictionary things.

It works for jet engines which burn hydrogon.

Nothing wrong in zhangmdevs original claims.

Wrong again -- there is no need to switch to hydrogen to use this technology.

Have you ever even TRIED to understand How the Sabre engine works?

Have you got ANY clue about basic thermodynamics?

Heat can never be removed. It can be only MOVED. That one of the most fundamental basic laws of physics.

The precooler of the Sabre engine works by cooling the air with helium, which is then cooled by hydrogen.

The only way to have reasonable amount of the cool hydrogen so that it can absorb enough heat for without carrying insane amount of it for nothing is to use the same hydrogen as the fuel.


And yes - theoretically that precooler could be put in front of an existing engine - but then you either

1) Just dump the hydrogen after it has warmed up. You then need huge hydrogen tanks just for the cooling. LOTS of extra weight and tank size. Quess what that means for the performance of the plane?

2) Add an afterburner which burns hydrogen to the engine. Not really an existing engine but not a totally new engine either. And then you always have to use that afterburner at high speeds where the incoming air heats a lot.

3) Lie about it being an existing engine, when in reality you make HUGE modifications to make it practically a totally new engine by converting it turn burn the hydrogen in the main chamber.

Talk about using the sabre precooler in "existing engine" is marketing bullshit - it's theoretically possible, but makes no sense at all for anything else than testing/prototyping.

And as you are totally clueless about the technology, but want to hype things you consider cool, you believe all this marketing bullshit.


It's VERY unlikely that Bae Tempest (which is designed as replacement for EF Typhoon) would use any technology from Reaction Engines.

However, if Mig-41 (big, fast high-altitude interceptor) was a british project it would probably use the precooler from Reaction engines which would make the project feasible - without it, as a russian project, the hype about mig-41 is just unrealistic.

[Corsair1963]

UK Planning Big Steps in Future Fighter Development, Wants to Work With USAF’s NGAD

April 27, 2021 | By Brian W. Everstine

The United Kingdom Royal Air Force is looking to make concrete progress over the next four years on its Future Combat Air System next-generation fighter jet and is reaching out for opportunities to test and compare its progress with the U.S. Air Force’s Next-Generation Air Dominance platform.

The United Kingdom Ministry of Defense in March released its “Defense in a competitive age” document outlining its strategy for modernization and future competition, including a $2.4 billion investment over the next four years on FCAS. Royal Air Force boss Air Chief Marshal Sir Mike Wigston, speaking April 27 during a virtual Hudson Institute event, said this funding will go toward developing a demonstrator, with the “big decision” on design to follow.

The RAF’s goal is to have FCAS lined up in the late 2030s to be able to phase out the Eurofighter Typhoon fleet for air defense alert, with the RAF’s F-35s flying much of the rest of the mission set. FCAS will be both piloted and unpiloted, with “swarms” of drones to assist.

Because of this timeline, Wigston said he looks forward to working with USAF on comparing progress with the NGAD system, which already has a demonstrator that flew last year. Additionally, the RAF wants to work alongside and compete with the French and German next-generation fighter jet initiative.

“There’s an opportunity to feed off each other, to test each other,” Wigston said.

The Eurofighter Typhoon is the “backbone” of the United Kingdom’s air defenses, and with the fleet expected to fly through 2040, the schedule is starting to get tight. “Right now, I need to get going, working through what will replace the Typhoon in our quick reaction alert sheds,” he said. “The clock is ticking.”

The RAF is also working on its own version of USAF’s Advanced Battle Management System, which Wigston referred to as a “combat cloud” to fuse air and maritime sensors. The program has been in development in recent years, but Wigston said he has “grown tired of looking at PowerPoint slides with lightning bolt symbols joining up bits of kit” without any real-world progress.

“I want to see this fielded operationally in my time,” he said.

The RAF is planning a demonstration in 2022 in the North Atlantic using this new system in a scenario focused on tracking and targeting a submarine.

“That’s bringing to life the ability to move information, move data, and fuse information so that any operator, any platform in the battlespace, can pull on the information it needs, fuse it, … and be able to make better decisions than an adversary,” Wigston said.



https://www.airforcemag.com/uk-planning ... safs-ngad/