View attachment 42626
If the wingspan quoted online is accurate at 14m. Each bay is at most 1.2m wide. With expandable fins of R-77, a fixed minimum diameter of 350mm for each missile. This means each main bay cannot fit three of today's R-77s. Three R-77s side by side would be around 1.05m, giving only around 15cm for gaps between each of the three missiles and the adjacent wall clearance. Assuming even gap, this would be only less than 4cm for each gap and clearance. There's no safe way of ejecting those missiles while turning with that kind of clearance. Bay is not deep enough to double stack or orient the missiles according to fin geometry. Su-57 should have more shallow bays given the thickness of the aircraft in that section. Why the designers didn't go with a fuselage similar to LM designs is strange. Perhaps costs were such a big issue they only had enough for new avionics and electronics on a stealthified flanker with internal bays. This is all not even considering the thickness of those doors which would realistically take out those gap margins completely because they certainly cannot be inward opening or sliding doors.
After looking at the models inverted, its obvious that the "side bays" are in reality covered, recessed "hard points",, in what are rather apparently enlarged fairings, covering the outboard wing sections attach point..
So my apologies,,, when I state there are NO "side-bays", I was referring to bays housed in the fuselage/engine nacelles,,, and the main bays are very shallow in comparison with the J-20/F-22..
anyway, there is apparently an extending "trellis" from those wing attach fairings, carrying what is obviously a very small short range AAM, the R-74?? so we haven't seen these fairings opened in actual aircraft operations.
So I wish to correct my erroneous statement, and apologies to all, Brat