Gross Mass: 227,000 kg.
Empty Mass: 227,000 kg. Thrust (vac): 12,517,000 kgf. Isp: 439 sec. Burn time: 190 sec. Propellants: Lox/LH2Isp(sl): 382 sec. Diameter: 27.4 m. Span: 33.0 m. Length: 18.2 m. Country: USA. No Engines: 1. L6HStatus: Study 1963. Comments: Operational date would have been June 1976. Booster stage (engines only). .