Sukhoi T-50 PAK-FA 055 BLUE Prototype is a Brand New Fifth Generation Jet Fighter Shown while Arriving at Zhukovsky Airport. Editorial Stock Image - Image of spotting, pakfa: 90966569
Although it's still struggling with the PAK FA, Russia is already working on 6th and 7th generation fighters - The Aviationist
Sukhoi T 50 PAK FA Stealth Technology - YouTube
Sukhoi PAK FA is designated as Su-57 - Air Data News