Yak seems to be the only one that actually has a 5th gen design outside of Sukhoi too!

this is old crap from 90s

seems that the same MiG guys have reached Mr.Rogozin recently
there was also PAK FA alternative developed at Sukhoi in 2005 that was thrown off in favor of Davidenko’s T-50
in summer of 2010 its author together with ‘alternative T-50 mafia’ have tried to push it again through Zhirinovsky that reportedly had forwarded their letter to Medvedev
they blamed existing T-50 as big mistake having structural problems due to rear weapons bay placement and downgraded specifications compared to Raptor and alternative PAK FA
last project, they say, has ‘right aerodynamics’ and abilities compared to Boeing’s NGAD/F-X

I’ve never seen any evidence of such advanced materials like that from Russia hence why I asked.

RAM and RAS doesn’t represent something out-of-this world tech, you know. take a look at Indian MiG-29K for example which is covered with ‘Special Coatings’ stencils – and this is export tech level.

Imho, the intake design serves two functions, partial LOS blockage of the compressor and EM scattering.

it serves LOS blockage no more than any inlet with moving ramp serves this purpose on any teen fighter series. well, inner walls have some visible faceting but don’t think they help much

no mention of intake internal features that serve to lower RCS, or purposely build S-ducts anywhere in patent text. well, you one of those who saw more than others yourself if you remember

of course, toeing engines in in plan projection for better control in case of one engine loss, moving intake ramp on certain flight regimes helps a little for RCS reduction (you should take into account constant positive angle of attack at cruise that not helps in the case) but its only secondary effect, radar blocker is a main trick here

Hope to see some surprises in the near future.-

what connection do you see between Saturn PDE tests and PAK FA program?

Thanks for your recent plethora of information, including unequivocal and official confirmation of the existence of the so-called ‘banana ducts’.

not. phrase says of inlet ramp being tilted in both dimensions as stealth measure

Are Sukhoi spooked by the engine sensor glitches and hence decided not to take T-50-3 into the air until these are resolved ?

three flights at KnAAPO is a standard practice for aircraft delivery to EMD team. 50-3 will have some additional stuff installed at LII – hence the delays
regarding ‘resolved’ – somehow they not concerned to fly 50-2 again soon after that recent glitch
50-1 should return to flight soon as unprecedented resources and will put into this