Gross Mass: 354,300 kg.
Empty Mass: 28,600 kg. Thrust (vac): 834,243 kgf. Isp: 337 sec. Burn time: 150 sec. Propellants: Lox/KeroseneIsp(sl): 311 sec. Diameter: 3.9 m. Span: 3.9 m. Length: 32.9 m. Country: Ukraine. No Engines: 1. RD-171Status: Hardware. Comments: Modification of same stage used as strap-on for Energia launch vehicle.