G-1 engine Rocketdyne exotic LF2/Hydrazine rocket engine. Atlas upper stage. Developed 1960's. Engine developed for replacement of Agena upper stage in late 1950's. Not flown due to toxicity of propellants. NOMAD Upper Stage System. Pressure-fed. |
RD-302 Glushko exotic LF2/Ammonia rocket engine. Developed 1960-69. Successor to RD-303 and predecessor to RD-301. Staged combustion cycle. |
RD-303 Glushko exotic LF2/Ammonia rocket engine. Developed 1960-65. Predecessor to RD-302 and RD-301. |
RD-270M Glushko exotic N2O4/Pentaborane rocket engine. In 1962-1970 Glushko studied use of Pentaborane 'zip' propellants in his monster RD-270 engine. Created immense toxicity problems but increased specific impulse of the engine by 42 seconds. |
RD-350 Glushko exotic LF2/LH2 rocket engine. Design concept 1963-. Studied by Glushko as engine concept with high-energy propellants. |
RD-550 Glushko exotic rocket engine. Experimental upper stage engine. Developed 1963-70. Propellants LOx/30% Beryllium+Pentaborane in 70% Hydrazine. |
Chariot Bell exotic LF2/Hydrazine rocket engine. Titan 3 upper stage. Developed 1960's. Engine developed for high-energy replacement of Titan 3 transtage in late 1950's / early 1960's. Not flown due to toxicity of propellants. |
FLEXEM Rocketdyne exotic ClF3/Hydrazine rocket engine. Flexible Energy Management. Pressure-fed. Sustainer 267-4000 lb thrust vacuum, specific impulse 260 seconds. |
RD-301 Glushko exotic LF2/Ammonia rocket engine. Proton K stage 4. Developed 1965-77. Developed by Glushko beginning in 1965. Planned for use in Proton K-4H high energy upper stage. Motor tested in 1977 but never flown. |
RS-19 Rocketdyne exotic ClF3/Hydrazine rocket engine. Condor Development Booster Air-to-Ground Missile. Pressure-fed. Thrust and specific impulse values are at sea level. |
X-430 GE exoticLF2/LH2 rocket engine. Developed 1960's. Very high energy engine developed in early 1960's for future large upper stages. Not flown due to toxicity of propellants. |