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Model: DAC Helios-2. Gross Mass: 1,070,000 kg (2,350,000 lb). Empty Mass: 214,000 kg (471,000 lb). Thrust (vac): 17,926.000 kN (4,029,925 lbf). Isp: 850 sec. Burn time: 392 sec. Propellants: Nuclear/LH2. Diameter: 21.30 m (69.80 ft). Span: 38.10 m (124.90 ft). Length: 27.40 m (89.80 ft). Country: USA. No Engines: 2. Motor: NERVA 1mlbf. Status: Study 1963.
Model: DAC Helios ISI-2. Gross Mass: 1,070,000 kg (2,350,000 lb). Empty Mass: 214,000 kg (471,000 lb). Thrust (vac): 17,926.000 kN (4,029,925 lbf). Isp: 850 sec. Burn time: 392 sec. Propellants: Nuclear/LH2. Diameter: 21.30 m (69.80 ft). Span: 38.10 m (124.90 ft). Length: 27.40 m (89.80 ft). Country: USA. No Engines: 4. Motor: NERVA 1mlbf. Status: Study 1963. Cost $ : 67.000 million.
Used on Launch Vehicles:
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