Gross Mass: 9,089,000 kg.
Empty Mass: 680,000 kg. Thrust (vac): 18,017,000 kgf. Isp: 304 sec. Burn time: 139 sec. Propellants: Lox/LH2Isp(sl): 271 sec. Diameter: 21.3 m. Span: 30.1 m. Length: 43.5 m. Country: USA. No Engines: 24. CD ModuleStatus: Study 1963. Comments: Operational date would have been December 1976. Recoverable stage. .