It seems you have not read the complete article. RR and IHI are developing the 6th generation engine that will eventually power the Tempest.Forget about all the time they had to design a flat nozzle 3d thrust vectoring design. I already have doubts with the photos they are sharing because they don't even display round serrated nozzles most 5th gens display (excluding 2). I don't know about the world leader part if they have not shown the simplest stealth design in their engines like this.
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The shitposting in the past on the Su-57 and KAAN nozzles will be long forgotten because it won't compare to a 6th gen(Tempest) flying around with round nozzles (not serrated with teeth even) is going to cause heart attacks if they really are flying a demonstrator in 2027 from what you have shown me.
This engine is an industry demonstrator engine, that will fly the plane and give data to engineers in correcting and redesigning the plane should it need, until the correct engine is ready to power the plane. Similar to the F110 engine we are using for the KAAN.
In its current form the EJ200 engine delivers close to 14000lbf. RR has actually manufactured a 16200lbf dry thrust version of this engine and was confident to reach 17500lbf dry thrust. For testing purposes this is adequate.
But the actual engine of the tempest is going to be nowhere near this engine in terms of power and technology . For one thing it’s design particulars included adaptive cycle technology.
So I wouldn’t “judge a book by its cover” yet!