Gross Mass: 4,535,000 kg.
Empty Mass: 363,000 kg. Thrust (vac): 2,721,000 kgf. Isp: 428 sec. Burn time: 646 sec. Propellants: Lox/LH2Diameter: 20.6 m. Span: 20.6 m. Length: 47.9 m. Country: USA. No Engines: 4. M-1Status: Study General Dynamics 1963. Comments: Massed estimated based on tank volumes, total thrust, and first stage burnout conditions. .