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Manufacturer Name: RD-120. Government Designation: 11D123. Designer: Glushko. Developed in: 1976-85. Application: Zenit stage 2. Used on stages: Zenit-2. Used on launch vehicles: Zenit. Propellants: Lox/Kerosene Thrust(vac): 85,000 kgf. Thrust(vac): 833.00 kN. Isp: 350 sec. Burn time: 315 sec. Mass Engine: 1,125 kg. Diameter: 1.9 m. Length: 3.9 m. Chambers: 1. Chamber Pressure: 162.80 bar. Area Ratio: 106.70. Oxidizer to Fuel Ratio: 2.60. Country: Russia. Status: In Production. First Flight: 1985. Last Flight: 1998. Flown: 32. References: 287 , 347 . Comments: The RD-120 is a high altitude engine used in the Zenit second stage. It was the first batch produced Russian engine to be test fired in the United States (3 test burns were made). Mass is wet mass.
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Last update 12 March 2001.
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