Gross Mass: 1,270,000 kg.
Empty Mass: 91,000 kg. Thrust (vac): 1,361,000 kgf. Isp: 428 sec. Burn time: 365 sec. Propellants: Lox/LH2Diameter: 19.5 m. Span: 19.5 m. Length: 38.0 m. Country: USA. No Engines: 2. M-1Status: Study General Dynamics 1963. Comments: Massed estimated based on tank volumes, total thrust, and first stage burnout conditions. .