UK's new Tempest fighter !

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I heard this will have a new Rolls Royce engines on it....possibly like the Sabre engines on Skylon. Is this a fact ? https://www.youtube.com/watch?v=WygX_wSxuCs BAE; https://www.youtube.com/watch?v=QWATZoGyLq0
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I doubt it unless they're making a real life version of Firefox... which I wouldn't be against, I just doubt it.
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But if Skylon works like expected...it can make rolls around the Tempest powered with conventional engines ? Wouldn't this extra operating altitude and speed kinda make the fighter invincible ( using the Sabre engine ) ?

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And what would you make the air frame out of that is both stealthy and heat resistant up to Mach 5.5? How big would it need to be to house the substantial fuel requirement as well as the helium cooling loop? You'd be looking at something at least the size of an SR-71 (150,000lbs loaded) and how well would IRST or an EODAS equivalent work at that altitude?
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High speed can only be applied at very high...scramjets estimate even M14 speeds. Maybe this needs to be reconsidered along with Trumps Space Force proposition.

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Sadly that looks like a conventional turbojet to me, although maybe adaptive cycle?

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[USER="77048"]St. John[/USER] The conceptual design for the Tempest engine is very similar if not identical to the one being developed by Rolls Royce and Turkey for the TAI TF-X.

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Quite possibly.
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Does it have a reheat ?

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Does it have a reheat ?
Clearly one can see th einjectors for reheat. I wouldn't be so sure aobut "standard turbojet" : there is it seems bypass + those two pipes. Let's wait and see.

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There is no such thing as a 'new Tempest fighter'. Tempest is a collection of Technology Demonstration Programme, and the plastic model unveiled last year just one of a number of concepts. What it eventually looks like will depend on how the eventual requirement is drawn up.

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Could be an EJ2x0 spin-off.

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Could be an EJ2x0 spin-off.
Not really. IP of EJ200 is not Rolls Royce only owned. (oh well, it could be witha ood ararngement)

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I'm going to take the position that RR's IP from their current civilian high bypass engine offerings and the Advance3 core in development is going to be worth a lot more to them than a 1980s design if the UK does in fact go down the Tempest route. RR isn't a company hurting for technical knowhow.

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[USER="77048"]St. John[/USER] EUROJET Turbo GmbH, a consortium made up by MTU, Rolls-Royce, Avio Aero and ITP owns the EJ200 engine IP. Thus, if Rolls-Royce wanted to offer or sell EJ200 technology it would need approval from the other consortium partners. Also the EJ-200 did not win the Turkish tender because Turkey changed the design parameters of the TF-X- requirement from 2 x 20,000 lbf engines to 2 x 29,000 lbf engines. TR Motor A.S, a Turkish company won the tender for the TF-X engine. See https://www.trmotor.com.tr/ The sub-contractor for TR Motor is Rolls-Royce.

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They could base it on the XG-40 though as I said, which is RR IP and essentially the same engine. But as you say, they're going with a new design requirement. There was an EJ2x0 proposal stated with 27,000lbf though, part of the ACME II program. This is likely to require so many changes and retest that it couldn't be deemed an EJ200 anymore though in terms of shared IP. https://en.wikipedia.org/wiki/Eurojet_EJ200#Variants https://de.wikipedia.org/wiki/Eurojet_EJ200#Das_ACME-Programm

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A Sabre like engines are very complex design that does not suite well for military jet that would be build in hundreds or even thousands. Carrying oxidizer leads to a lot of drawbacks but a few advantages. If suborbital flight is not required, all related systems is just a dead weight. Oxidizer tanks, pipes, precoolers etc. Also, such a jet would be much larger than a proposed model. I can see only one possible innovation for a Tempest engine: variable cycle. Like YF120 and AL-41F (initial MiG-1.42's version). TWR nozzles also, but it's not an innovation, really.
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I wonder if the Sabre engine in Skylon is able to handle bird strikes ?