This page no longer updated from 31 October 2001. Latest version can be found at RD-851

Manufacturer Name: RD-851. Government Designation: 8D63. Designer: Yangel. Developed in: 1958-63. Application: R-16 (SS-7) stage 1 attitude control engine . Propellants: Nitric acid/UDMH Thrust(vac): 3,310 kgf. Thrust(vac): 32.48 kN. Isp: 279 sec. Isp (sea level): 243 sec. Burn time: 115 sec. Mass Engine: 403 kg. Diameter: 3.5 m. Length: 1.7 m. Chambers: 4. Chamber Pressure: 66.20 bar. Oxidizer to Fuel Ratio: 2.45. Country: Ukraine. Status: Out of Production. References: 348 , 344 . Comments: Four thrusters are each gimbaled in one single axis.
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Last update 12 March 2001.
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© Mark Wade, 2001 .