No I haven’t – have you? Many countries have such technologies, they still buy stealth aircraft, China included.

Sure they do, as does the USA, China Israel and Europe as a whole too. But they are all buying the latest stealth aircraft. Remember, other countries also AD systems similar to the S-400, at least when we are talking about anti-stealth capabilities are concerned

Many countries around the world have ground based AESA AD radars in their military, they don’t tend to regard them as complete panaceas against the stealth treat – or even against non-stealth targets.

Sorry but if what you say would have even a little connection with reality, Turkey would have acquired that western system that would have matched the more S-400 performances and would have had no trouble at all.
No western country has something even minimally comparable to the WHOLE of Russian-styled network of different band and function radars, overlapping SAM system ranging from Shorad to Sub-orbital ones topped to dedicated interceptor and fighter planes.
Certainly, also they have excellent radars, some very good SAM systems but even during the Cold War period they always preferred to dedicated their own effort in building instead numerically strong Air forces topped by Awacs also because they had to use it not just in the AD role as a way to counter Warsaw Pact superiority on land.

The idea that developing AD system prevent you somewhat to acquire stealth planes is at the same way disconnected by any logic sense: everyone, not just armed forces buy what better fits its own needs using the best technological solution available ATM.
What can however change is the percentage of total effort and budgetary resources respectively put in developing and acquiring a part of the arsenal instead the other.

Let’s add that there is nothing preventing to insert stealth planes into a already well developed AD system a.t.c.they could act as force multiplier one to another like is actually proposed in the case of F-35 operating as a form of a middle course guiding system for ship-launched SM-6 Standard missiles

It’s always skimpy to ascertain the real “cost” of a plane: it all depend of such an array of variables that any direct comparison between two different countries is almost out-of-question.
Let’s say that in my country (Italy) all State cost for development and even the production of the first serial item of any military hardware fall under the Industry and Economy Development Ministry’s budget,so that our MoD got our actual and future Flagship Cavour for free…
So IMHO better skip this kind of metrics off.

Thank, Bring_it_on: so they are basically exploring different options to discover what is the most operatively suitable?

Actually, your remarks are contradictory? As one hand me make sound like it is no big deal. Then it’s a “great advancement”??? Simple fact while the concept it generally not new. The simple fact is nobody has been able to make it “work”. So, if the US can deliver it would be a major break thru…..many would call that “revolutionary”.

Scooter, the contradiction exist only in your chauvinistic mindset.

You are mixing two different topics into one.
First one is the innate unreliability of promotional brochures send out by the producers as a way to judge a defense related item and that’s I repeat, INDEPENDENTLY from the producer in itself and the country from which it came from.
What that eventually change is the level of lack of critical sense, chauvinism and the gullibility of the audience they relate to… :rolleyes:

I tried so to explain you how to critically read what is really written in the promotional leaflet you posted, hope you have almost tried to read it but given the tone of your reply I have not a great hope on it.

In a second part, after that I have limited the claims contained in this propaganda leaflet, in the sense of reducing them to their real dimensions, I eagerly concede that such space for performance enhancements (obviously in the above highlighted speed range) trough the use of the variable bypass technologies (not just ACE) really exist and so it is pursued (and it was previously, see F-120 and Al-41F) by all the major engine producers.

ATM, it is certain that no one such engines is even near to operativity (although I would, with the same eagerness i talked above, bet on some american firm to come first to it),
So sorry, maybe it’s just a little too early to begin your usual chestbeating routine basing yourself just on your own partial understanding of a corporate propaganda piece.

In case anyone was wondering about the weight of the F135:
The F135 engine weighs 3,750 pounds and is 18.3 feet long.

https://www.tinker.af.mil/News/Article-Display/Article/385150/f135-engine-depot-stand-up-has-started/

Makes the weight estimates made over the years laughable (5,000+ lbs)

SEnd it to wikipedia, they have still old numbers.

Some interesting notes :

1.Development target of T/W of 10:1 has not change.
2.Internal Weapon Bay capacity of Su-57 is about 4200 Kg.
3.Still hasn’t give up on flat nozzle eh.

6x700kg, more than external one that is 4×700+ 2×300.

[USER=”1416″]Scooter[/USER] :if you base your judgement about a new item using as your main source the promotional brochure of the producer itself, EVERYTHING would seems revolutionary independently by who the producer is and from what county it came from.

In this case they are using the usual trick of publishing only a partial data: the 25% better fuel, 20% higher thrust consumption refers to SUPERSONIC regime, not to the overall one.

Variable bypass ratio or adaptative cycle if you prefer to use such a term is something though to divert and reroute the air flow between the cold and the hot section of a turbofan.
in the case of ACE it work though the use of a third ,intermediate stage that can swap its own flow between the two.
In the subsonic cruise mode it will act as a high bypass turbofan, with the most of air flowing through the cold section, in transonic flow woud be partially diverted, so to still have some in the cold one in order to use afterburner, in full supersonic it would go for the most part through the hot one making the engine a quasi-turbojet or better said, a leaky turbofan.
It is precisely at that range speed that you get the highlighted advantages, in subsonic one it will be almost the same that today, with just the few gains that one can expect with adopting a newer engine.
It will be a great advancement, above all or certain type of planes or missions, so I expect that about all the main producers would head trough it.
In the case of F-35 however , I expect that it would be much more useful for expanding its own performances in A2A missions than in the A2G one that will still remain its main role.