It is a stealth plane its rcs is small enough to be called a stealth plane, designed with both radar based stealth and IR stealth in mind, it's also supermaneuverable along with stealth, something with f35 and j20 lacks, it can also supercruise something that f35 lacks.
But it is not as advanced as f35 in terms of avionics and sensors, even su57, early j20 varients in terms of Avionics and sensor suite, rafale f4 even f3 has more advance and more complete sensor suite than f22.
F22 in terms of avionics and sensor suite is the most outdated stealth jet in service.
Second it has quite less amount of composites than f35,su57,j20.
Even eurofighter, rafale, tejas have more amount of composite than f22.
And composites used in f35, su57,j20 are ras material, with stealth baked into the airframe material itself + additional stealth RAM coating.
F22 is majority metal with significant amount of composites, but as said before it doesn't have RAS, it depends entirely on RAM coating on its skin for its stealth, hence much more radar absorbing and heavy RAM coating is needed for f22, its RAM while pretty good at absorbing radar waves is pretty fragile, and require very frequent re-coats of RAM to maintain stealth, in lots of training exercises many f22 are not even painted with that coating hence lots of pics of its naked metal in internet.
And while f22'a rcs is said to be 0.0001m2 from frontal arc, but that's kinda bogus, it's most likely talking about it's frontal rcs " from optimal angle" or the lowest value In it's rcs range, no stealth jet has 0.0001m2 frontal median or avg rcs, you just can't have that with current stealth material tech, it will require so mach ram/ras material that aircraft will be too heavy to take off with decent payload and fuel or even too heavy to take off at all, plus boat loads of other problem that will arise.
Even j20 and even su57 has 0.0001m2 rcs from certain optimal angles.
Now, again, a jet's rcs Is not a single number or range, but to get a general gist of a stealth of a fighter jet, you can use these no. I painstakingly concluded over the years based on many simulations and other info.
Su57's " frontal rcs" ( -60° to +60°)= 0.006-0.01m2
But when it's naked irst is working and not closed it's rcs increase to 0.1-0.2m2, can't call it stealth with this much increase in rcs.
F22s = 0.001-0.005m2.
J20 =0.003-0.006m2.
F35= 0.0005-0.0015m2.
These are the rcs figure for frontal arc of these fighter jets.
Also note, just like there are optimal angles for where rcs can go as low as 0.0001m2, there are also angles where rcs spikes, these no. Are for general understanding of frontal stealth of these jets.
Another interesting thing.
In L band and vhf frequency su57 actually has the lowest rcs out of all the stealth jets, due to its overall slimmer profile.
But it also has the highest rcs in x band out of all the stealth jets.
If su57 had better stealth in x band then it could have been the best stealth fighter jet platform in the world.
It can supercruise, has supermaneuverability, big enough & high potential for future upgrades, can carry cruise missiles in its iwb, biggest iwb and biggest iwb capacity out of all the 5th gen jets, a very impressive sensor suite( everything f35 has in sensors but also
side facing and even back facing radars, dircm etc.) But individual sensors and it's architecture is not as advanced as f35, but again these can be upgraded in the future, lowest rcs out of all 5th gen jets in L and VHF band, if only it had better stealth in X band

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