PAK-FA / Sukhoi Su-57 - Updates and Discussions

Lol, only one of us is known here for blowing hot air and got a nickname for it and it's not me.

You're acting like nobody here knows TWR = Engine Thrust/ Aircraft Weight. You keep hiding behind “just divide two numbers” because your entire understanding of fighter propulsion apparently begins and ends with a middle-school ratio, Congratulations, we’ve now covered high-school algebra. Now lets move onto adult talk, the problem is your entire argument falls apart because static TWR alone does not determine whether an engine-airframe combination is operationally viable, otherwise an unaerodynamic brick with TWR above 1 would fly like a fighter jet. Aerodynamics, lift generation, drag, inlet efficiency, control laws, wing loading, transient thrust response, thermal margins and overall airframe integration matter enormously. That’s why aircraft with similar paper TWRs can have completely different acceleration, climb, sustained turn and takeoff performance in reality. The Sukhoi Su-57 already demonstrated extremely aggressive acceleration and takeoff behavior in hot-and-high Bengaluru conditions while you’re still reducing one of the most complex engineering disciplines on Earth into “bro divide two numbers.” Sorry but aerospace engineering is slightly more advanced than your Reddit spreadsheet.

Big words for nothing. Your argument would have made sense if Izd 30 never existed. Good luck.
 
@STEPHEN COHEN From AI in chrome.

The Ukrainian military has not issued an official confirmation regarding the loss of a Saab 340. Reports of the Swedish-supplied airborne early warning aircraft being shot down in eastern Ukraine stem from unverified claims by Russian military bloggers. [1]

Current Status of the Saab 340 in Ukraine
  • The Claim: Russian sources, including prominent military blogger Boris Rozhin, alleged that a Ukrainian Saab 340 Airborne Early Warning and Control (AEW&C) aircraft (ASC 890) was targeted and hit by an air-to-air missile fired by a Russian Su-57 fighter. [1]
  • Verification: As of May 12, 2026, there is no official corroboration of this loss from the Ukrainian Air Force or the Swedish Ministry of Defense. Western defense analysts and media often treat such specific operational loss claims from Russian channels with skepticism until physical evidence or official statements are provided. [1]
  • Capability:
 
@STEPHEN COHEN From AI in chrome.

The Ukrainian military has not issued an official confirmation regarding the loss of a Saab 340. Reports of the Swedish-supplied airborne early warning aircraft being shot down in eastern Ukraine stem from unverified claims by Russian military bloggers. [1]

Current Status of the Saab 340 in Ukraine
  • The Claim: Russian sources, including prominent military blogger Boris Rozhin, alleged that a Ukrainian Saab 340 Airborne Early Warning and Control (AEW&C) aircraft (ASC 890) was targeted and hit by an air-to-air missile fired by a Russian Su-57 fighter. [1]
  • Verification: As of May 12, 2026, there is no official corroboration of this loss from the Ukrainian Air Force or the Swedish Ministry of Defense. Western defense analysts and media often treat such specific operational loss claims from Russian channels with skepticism until physical evidence or official statements are provided. [1]
  • Capability:
This is a strategic asset, there won't be any confirmation, only claims and denials. Unless some wreckage media emerges.
 
And people thought HAL is randomly involved with the Russians for Su-57 deal, lol:


As I said earlier, it is outright decision of both GOI & IAF. @randomradio, @_Anonymous_

You've misread it. What's in the tweet there is actually what I've been saying. HAL's talks with Russia are useless, it has to be approved by MoD, and there's no approval.

So there's nothing happening with the IAF on this front.

IAF is asking for something the Russians cannot provide, ie, training an IAF pilot on the Su-57M1 so it can be evaluated in India; Rajasthan and Leh. That's been the requirement since 2017, which the Russians have denied permission for. By asking for the impossible, the IAF is showing no intention of going for the Su-57. It's a dead-end program for the IAF.

Now what's necessary is for the Russians to finish the development of the two-seat and then give IAF pilots a backseat ride. But by the time this happens, ie, two-seat achieving operational capability and with the Izd 30 (very important), AMCA will already be flying and IAF would have made a decision on SCAF/GCAP, plus the Chinese would be flying 6th gen J-XX.

At this point, the Su-60 will have to show extraordinary value beyond what the AMCA provides because IAF will have to justify duplicating AMCA's capability at a cost that rivals or more than rivals India's participation in SCAF/GCAP and the contract value of AMCA. It means Su-60 will have to duplicate the capabilities of SCAF/GCAP to have any value to the IAF.

So new competition between SCAF, GCAP, Su-60, and maybe F-47.
 
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Looks like the same inlet design.

The spine has been modified the same way as on the Su-27 to Su-30 conversion. The increased height compensates for the loss of fuel from Tank 1 due to the second cockpit. This way both carry the same amount of fuel.

Let's see if they have enlarged the stinger for a rear-facing radar which the IAF originally wanted.
 
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