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Lox/UDMH
RD-119
RD-119
Credit: © Mark Wade
Lox/UDMH propellant. This propellant combination, with higher performance than either Lox/Kerosene or N2O4/UDMH, was developed by Glushko in Russia in the 1950's. However the use of toxic UDMH was unacceptable to rocket designer Korolev, while the use of cryogenic liquid oxygen was unacceptable to the Soviet military. Glushko's plans for use of the propellant in larger boosters had to be in abandoned, and it was used instead for in small upper stages for the Kosmos launch vehicle series.

Specific impulse: 363 s. Specific impulse sea level: 310 s. Location: 1865.

Optimum Oxidizer to Fuel Ratio: 1.67. Temperature of Combustion: 3,615 deg K. Ratio of Specific Heats: 1.24. Density: 0.97 g/cc. Characteristic velocity c: 1,865 m/s (6,118 ft/sec). Isp Shifting: 310 sec. Isp Frozen: 296 sec. Mol: 21.30 M (69.80 ft). Oxidizer Density: 1.140 g/cc. Oxidizer Freezing Point: -219 deg C. Oxidizer Boiling Point: -183 deg C. Fuel Density: 0.793 g/cc. Fuel Freezing Point: -57 deg C. Fuel Boiling Point: 63 deg C.

Subtopics
RD-109 Glushko LOx/UDMH rocket engine. Developed 1957-60. Intended for second stage of LOx/UDMH 8K73 version of R-7. Abandoned because of Korolev's refusal to use such a toxic fuel. Later basis for RD-119 used on the Kosmos space launcher.
RD-112 Glushko LOx/UDMH rocket engine. ICBM stage 1 (stage 2 was RD-113). Developed 1960.
RD-113 Glushko LOx/UDMH rocket engine. ICBM stage 2 (stage 1 was RD-112). Developed 1960. Upper stage version of RD-112 with larger nozzle.
RD-114 Glushko LOx/UDMH rocket engine. Used in ICBM stage 1 (stage 2 was RD-115). Developed 1961-65.
RD-115 Glushko LOx/UDMH rocket engine. ICBM stage 2 (stage 1 was RD-114). Developed 1961-65. Upper stage version of RD-114 with larger nozzle.
RD-119 Glushko LOx/UDMH rocket engine. Kosmos 1 stage 2. Out of production. Derived from RD-109 motor originally intended for the second stage of a LOx/UDMH version of the R-7. First flight 1961.
S1 LOx/UDMH propellant rocket stage. .
Engines: RD-119, RD-112, RD-113, RD-114, RD-115, RD-109. Stages: S1.
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