The IRST is designed exactly for that, short to midrange detection based on the heat signature. Yes, the F-22 design has taken that into consideration to improve the heat signature of the airplane. But, putting it simply, at shorter distances this advantage disappears.
The respective IRST used by the SU-57 is widely acknowledged to be the same used on the SU-35. How does this IRST determine range? Via the use of a laser rangefinder, same as every other IRST. Until the SU-57 is within the laser rangefinder range, which for the specific system fitted to the SU-57 is 20km, it is unlikely to be able to detect the F-22, if the IRST can even find the jet at that range anyway. http://www.knaapo.ru/products/su-35/
Not only that but as mentioned in the other thread the IRST increases RCS when used, increasing the front RCS aspect of the aircraft
You say that scenario is not going to occur, but what if it does? Putting it simply, the F-22 has quite the advantage over 4th, and 4++ generation jets like the Su-30 or Su-35 because they don't have stealth. But the Su-57 does, albeit with some obvious exceptions in the rear part.
There are no indications that the SU-57 has gone beyond LO stealth. Forget shaping and RAM treatment, VLO stealth is a whole level below that necessitate changes and customization of nearly every external system, the alignment and build quality of the airframe etc.
We don’t see that on current SU-57 prototypes.
If that specific scenario does occur then the respective F-22 driver deals with it, hoping that his training and experience, which ultimately decide most WVR engagements anyway, allows him to come out on top.
If the Su-57 and F-22 are approaching each other from far away, it is the front profile RCS that matters. I'd say from the front the Su-57 RCS is probably respectably low, perhaps enough to get into mid to low range against an F-22. This is of course debatable, but I think we can all agree the Su-57 is optimized to have lowest RCS from the front. So, it becomes "stealth vs stealth", and if they can't detect each other from far away then logically they will end up close to each other by the time they do detect each other.
Why are they approaching each other from the front? Why do you need to limit the entire airspace around the jets to accommodate one single aspect engagement profile? How does the SU-57, or the F-22, know that its aspect is exactly pointed front to its adversary?
As you said there is nothing too revolutionary or unique about the Su-57 sensor suite, perhaps it is more sensitive, perhaps more efficient or stealthy, but neither is the F-22 sensor suite which is now 20+ years old.
The F-22 has been continually upgraded through its service life. The Russians are working on their first airborne fighter sized AESA in a production jet. Russian AESA module development is significantly behind western designs and manufacturing techniques. Russian companies are under significant sanctions for just these exact advanced systems and sensors that are required for fighter applications.
To put it simply, do you think an F-22 can detect another F-22 at far distances? I think not, and this would apply to any stealth aircraft.
There are too many variables to answer that question including the nebulous term far.
Once they get close, the advantage might be to the Su-57. It has IRST, it has a helmet mounted "look-shoot" capability, it has an ECM suite, it is arguably a little more maneuverable, and it has a better datalink. These are all things that, in theory, should give advantage to the Su-57 at shorter distance fights.
FYI, there is no evidence that the SU-57 has a better datalink than the F-22. Given the Russians still have not produced a tactical datalink that rivals Link-16 while the F-22 has the IFDL which is significantly more advanced as well as LPI, I have very large doubts .
You are making huge assumptions in claiming what will occur. At this point in time I will go with the nation that has four in service manned stealth aircraft and a host of unmanned stealth platforms over the nation that has zero of either.
Respectfully disagree. I'm not trying to turn this into a pissing contest, but show me 1 video of a US fighter that can maneuver as well as a SU-35 or T-50/SU-57?
I am not going to waste my time looking at youtube vids of aircraft that do not represent production weights or configurations. Nor am I going to bother worrying about low and slow portions of demos that, again, have no tactical value… Plenty of aircraft do low and slow stunts at airshows around the world and in most cases do not represent production weights and configurations for these aircraft. To attempt to claim an aircraft is manoeuvrable from an airshow, or youtube in general, is flawed.
Not very tactically useless when you have to dodge missiles or forced into a WVR dogfight because EW and radar have caught up with stealth which we are seeing happening.
There is no indication that EW and radar have caught up with stealth. If so, why are nations around the world continuing to develop and field stealth aircraft? They could save literally billions of dollars and avoid the compromises that come with operating stealth airframes if they believed that. Instead the development of systems from Russia, China, USA, Japan, Korea, India, France, Turkey etc all point to stealth being a key aspect of military aircraft development and has become a mandatory in service requirement.