Gross Mass: 205,442 kg.
Empty Mass: 99,773 kg. Thrust (vac): 54,420 kgf. Isp: 1,980 sec. Burn time: 58,000 sec. Propellants: Air/KeroseneIsp(sl): 1,800 sec. Diameter: 13.7 m. Span: 54.0 m. Length: 53.4 m. Country: USSR. No Engines: 4. NK-231Status: Hardware. Comments: Tupolev Bomber-variable geometry. Maximum release conditions: Belly-mounted, 9,977 kg at 2,451 kph at 18,292 m altitude.