Is the whole Engine face hidden or only a portion of engine face hidden?

Whole compressor will be hidden behind blocker. Blocker in T-50 looks quite different than blockers on X/F-32 and F/A-18E/F.

It is very difficult to believe that compressor face will not add to the RCS (with or without radar blocker)

Boeing engineers believed (and proved to USAF on RCS range) that compressor face of F-32 PWSC can be hidden under radar blocker, giving RCS numbers as low as their competitor with S-duct and DSI inlets. They also claimed frontal RCS of F-15SE to be as low as F-35s. Of course anyone can say that he knows LO tricks better that Boeing and Sukhoi staff – I left it’s up to them.

What is the status works of the new engine ?

‘Tender’ for 5G engine was – as it was predicted – just a proforma, and while Salyut has shown much more promising results with gas generator, Saturn got the contract. Head of NPO Saturn Ilya Fyodorov and Chief designer of its branch Lyulka Engineeering Center Eugeny Marchukov are in charge of new engine. Program got classified codename and Article number (Izdeliye 127?), project design specifications are signed, and work is given green light/full throttle.

Presentation of project doesn’t mean presentation of model/mockup at all. AFAIR, eighteen months stated as time of preliminary FGFA design stage after first money will go from Indian partners.

It’s governor Shport talking. It’s like Nancy Pelocy was talking something in respect of specific details of new Block upgrades for Raptors at Elmendorf…

did you take a long look at it?

yes I did. seems that you didn’t

the duct goes up and blocks any room for a side bay.

duct not only goes up, it goes inward as well – it’s clearly seen. there’s plenty of volume for F-22-like side bays for SRAAMs

if that is true then the diagram would not make sense. the s-duct in that picture, blocks the side bays from fully opening.

no, it doesn’t

you won’t be excited – so far just patent claims are available

Sukhoi patent talks of LO of engine guts from the backdoor – afterburner, flameholder, turbine etc.
so if we saw *forward* radar blocker, patent definitely talks of *back* one

is short, no mechanical devices are used per se, pilot or ESM just activates ‘stealth mode’ that swivel TVC nozzle to position that prevents (well, should prevent) enemy radar/IR seeker to see hot and RCS-yummy stuff inside the engine back, moreover, nozzle can swivel by some calculated pattern (not unlike those you see in videos when Su-37 or MiG-29OVT are checking nozzles prior to flight) controlled by FBW according to what ESM says to FBW brains. of course, to compensate that nozzle weird dance, FBW uses aerodynamic controls to flight straight&level or perform a planned maneuver.
we yet to see how T-50 EMD nozzle would look like but seems that if they worry of internals, they seem to not worry of nozzle RCS – would it be jaggered in F-35 style or 2D TVC, is not clear

Saturn patent (Chepkin is one of the inventors) talks of dispencing nano- (word a la mode here) particles between some ‘object’ and enemy radar, various type of particles should dissolve radar waves of various lenght.

are these patents really have something to do with T-50 itself we are yet to see

Yes I think that T 50-2 will be fly in the summer.

I know that much earlier…