United Aircraft Corporation, together with the Sukhoi Construction Office, announced the flight of 10 prototype of the 5th generation Su-57 fighter and at the same time the first model in the “phase two” or “modernized” configuration. Really, however, it should be called the version “promised 12 years ago”. It is the first aircraft with engines and another solutions, which were mostly developed for the first Su-57, but managed to force them to work decently only 12 years after the icy of the first prototype, then inactive called the Sukhoi T-50.