Indeed, but there were also other odd choices, Like choosing to go for naked irst, instead of housing it in a stealthy crystal dome, now it's good when irst Is closed, but when it's working it basically increases it's rcs so much that it can't be called a stealth jet anymore, 0.1-0.2m2 from frontal arc with irst open.
It's still possible that they might implement a faceted enclosure on the production jet...but just like with the nozzles, no guarantees. It'll all depend on how expensive it turns out to be and whether they determine that series-production with this increased per-unit expenditure makes sense or not.
But then they also went for ambitious choices like, side and back facing radar arrays, small L band arrays to act as an "presence detector", DIRCM etc.
Basically sensor suite is quite extraordinary, though individual sensors not as technologically advance as f35's.
Yeah, the goals are kinda all over the place. Possible that this is part of the reason why the program is taking so long. They over-extended themselves...it would've probably been wiser to go with an airframe that basically uses the same sensor suite as Su-35 first, get it into production, then implement all the new stuff over a series of blocks/tranches.
The L-band radars were actually already implemented on Su-35. Of course they are fundamentally antithetical to all-aspect stealth.
The biggest leap IMO, more than all the extra arrays, is actually the move to AESA over all their previous PESAs. But for some reason, they're struggling to implement/productionize AESA across programs. We actually pressed for Virupaksha on our MKI upgrade partly because Tikhomirov was failing to offer an AESA that can be put on the Flankers...which makes me doubt the readiness/capability of the Su-57's N036 as well.
So for the stealth compromise, I don't think industrial limitations and lack of money were the only thing, I think russian themselves didn't value stealth as highly as americans did(i'm with the americans on this), when designing/building su57, and were willing to make compromises for benifits in other areas.
Yes philosophical differences with regard to stealth are there as well. The L-band arrays mentioned above being one example. The Russians' AEWs suck and they never really implemented that type of airborne battle management so they kinda have no choice. The Su-35/57 are gonna have to perform their own long-distance IFF with those L-bands.
Not to mention, now there's the war which is forcing them to take a fundamental relook at their arms industry & about what kind of platforms they need to be buying over the next 5-10 years. I actually talked about this before:
RuMOD: Going to complete all tests of “Altius” mil heavy UAV during 2018
www.strategicfront.org
"...for the Russians, now is not the time for expensive white elephant programs which may or may not become available in sufficient numbers a decade down the line. Now's the time for cheap, proven systems that require minimal, if any, changes to existing infrastructure, logistics & training regimens. To quote myself "less T-14s and more T-72B3s."
This also serves as an indication that Russians will not be in any shape to invest the required amounts in programs like T-14, Su-57, Su-75, S-500, etc. Which means for the foreseeable future, a lot of those programs can be effectively understood to be in cold storage. Limited series production at best."
I'd venture to say that programs of strategic significance like nuclear submarines (and perhaps S-500) will continue to get sufficient funds - this was the case even after Soviet collapse - but the tactical systems like fighters, tanks etc. likely won't.
So what I said regarding T-14 & T-72B3 will likely apply to Su-57 & Su-35/34 as well...unless they manage to find someone (like India) who's willing to bankroll the Felon.