Gross Mass: 4,399,000 kg.
Empty Mass: 880,000 kg. Thrust (vac): 9,841,000 kgf. Isp: 810 sec. Burn time: 285 sec. Propellants: Nuclear/Lox/LH2Isp(sl): 500 sec. Diameter: 21.3 m. Span: 57.9 m. Length: 50.3 m. Country: USA. No Engines: 4. NERVA/Lox Mixed CycleStatus: Study 1963. Comments: .