Su-57 probably has the best agility among 5th geners due to wide wingspan giving it superb turn rate.
Ah How? I mean you tend to want to have an actual aircraft to show one. Unless this is a modified prototype or just a mock up the Russians have what 1 production bird incomplete last I checked and one crater.
TBH, I'd suspect this will just be a mockup.
TBH, I'd suspect this will just be a mockup.