Even after the Su-54 fell through, Sukhoi attempted to offer Su-55 and Su-56 for export to India and South Africa in the 1990s, but to no avail. One final attempt to revive the concept in the ...

The Ukrainian Defense Intelligence Agency announced the strike Sunday, saying that it targeted Sukhoi Su-57 ... Institute, an SU-57 costs anywhere from $35 million to $54 million.