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Engine Model: Helios Stage 1. Propellants: Lox/LH2. Thrust(vac): 1,667.000 kN (374,756 lbf). Isp: 400 sec. Isp (sea level): 340 sec. Burn time: 117 sec. Chambers: 1. Country: USA. Status: Study 1960.

Engines for booster stage with Lox tanks only to take nuclear second stage to stratosphere.



Helios Stage 1 used on Rocket Stages


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