weight : 21,000 kg (46,300 lb) Powerplant: 2× Klimov RD-33 afterburning turbofans , 8,300 kgf (81.4 kN , 18,300 lbf) each Performance Maximum speed : Mach 2.25 (2,400 km/h, 1,490 mph) At low altitude: 1,500 km/h, 930 mph Range : 700 km (430 mi) Ferry range : 2,100 km (1,800 mi)