The Su-57 is the Russian Raptor Killer. At least, it is what they designed it for.The Su-57 is the most complex Russian plane ever built and, being Russian, it is built according to principles and specifications different from those in use in the west.Since we can give little for granted, there is a lot to say about the Su-57 and the series is going to have 5 or 6 episodes in the coming months, if you are going to like them.