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Gross Mass: 1,995,800 kg (4,399,900 lb). Empty Mass: 199,600 kg (440,000 lb). Thrust (vac): 28,553.000 kN (6,418,969 lbf). Isp: 267 sec. Burn time: 162 sec. Propellants: N2O4/UDMH. Isp(sl): 245 sec. Diameter: 6.61 m (21.68 ft). Span: 9.26 m (30.38 ft). Length: 57.16 m (187.53 ft). Country: USA. No Engines: 1. Engine: PF N204/UDMH-2912k. Status: Study 1967. Boeing Low-Cost Saturn Derivative Study, 1967 (trade study of 260 inch first stages for S-IVB, all delivering 86,000 lb pyld to LEO): Low Cost Booster, Single Pressure-fed N2O4/UDMH Propellant engine, HY-140 Hull Used on Launch Vehicles:
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