| SLS Stage B |
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Model: SLS Stage B. Gross Mass: 160,000 kg (350,000 lb). Empty Mass: 11,200 kg (24,600 lb). Thrust (vac): 1,778.651 kN (399,857 lbf). Isp: 424 sec. Burn time: 345 sec. Propellants: Lox/LH2. Diameter: 7.62 m (24.99 ft). Span: 7.62 m (24.99 ft). Length: 25.00 m (82.00 ft). Country: USA. No Engines: 2. Motor: J-2. Status: Study 1961. Tranlunar injection stage for Project Lunex. Masses estimated based on optimum apportioning of B+C stage total masses. Used on Launch Vehicles:
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