This page no longer updated from 31 October 2001. Latest version can be found at RD-301

Manufacturer Name: RD-301. Government Designation: 8D21. Other Designations: 8D21. Designer: Glushko. Developed in: 1965-77. Application: Proton K stage 4. Used on stages: Proton K-4H. Propellants: LF2/Ammonia Thrust(vac): 9,860 kgf. Thrust(vac): 96.67 kN. Isp: 400 sec. Burn time: 750 sec. Mass Engine: 183 kg. Diameter: 1.0 m. Length: 1.9 m. Chambers: 1. Chamber Pressure: 117.60 bar. Area Ratio: 108.70. Oxidizer to Fuel Ratio: 2.70. Thrust to Weight Ratio: 54.64. Country: Russia. Status: Developed 1965-77. First Flight: 1977. References: 225 , 283 , 317 , 343 . Comments: Developed by Glushko beginning in 1965. Planned for use in Proton K-4H high energy upper stage. Motor tested but never flown.
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Last update 12 March 2001.
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