Model Variants (Including Prototypes)
Su-27 (Flanker) - Base Single-Seat Air Superiority Model Designation.
Su-27M (T-10S-70) - Prototype Su-35 billed as "improved" Su-27 design.
Su-35 (Flanker-E) - 2 x Saturn 117S TVC-nozzled turbofans of 31,900lbf with afterburner; foreplane canards; Digital Fly-By-Wire systen; Phazotron N011 Zhuk 27 radar element; rearward facing N012 radar; In-flight refueling probe; Color HUD and three CRTs; provisions for ECM pods; single-seat.
Su-35UB - Two-Seat Fighter/Trainer; increased vertical fin height; forward portion similar to that of the Su-30 variant.
Su-35BM - Export Designation; single-seat fighter based on SU-27SM2 but with Su-35 system software; 2 x LCD screens; helmet-mounted displays; "Fly-by-Optics"; upgraded avionics; revised airframe for reduced radar cross-section; sans canards; satellite navigation system.
Su-37 (Flanker-F) - Experimental Multi-Role Fighter; single seat; thrust vector control; 2 examples produced but eventually converted to Su-35 form.