Helios C-2
Gross Mass: 309,000 kg (681,000 lb). Empty Mass: 54,000 kg (119,000 lb). Thrust (vac): 5,780.000 kN (1,299,390 lbf). Isp: 830 sec. Burn time: 355 sec. Propellants: Nuclear/LH2. Diameter: 8.50 m (27.80 ft). Span: 12.20 m (40.00 ft). Length: 85.40 m (280.10 ft). Country: USA. No Engines: 2. Engine: Nuclear 12 Gw. Status: Study 1960.

Nuclear second stage


Used on Launch Vehicles:  
 
 
 
 
 
 
 
 

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