This page no longer updated from 31 October 2001. Latest version can be found at RD-275

Manufacturer Name: RD-275. Designer: Glushko. Developed in: 1980's. Application: Proton stage 1. Propellants: N2O4/UDMH Thrust(vac): 178,000 kgf. Thrust(vac): 1,745.00 kN. Isp: 317 sec. Isp (sea level): 285 sec. Burn time: 130 sec. Mass Engine: 1,280 kg. Diameter: 1.5 m. Length: 2.7 m. Chambers: 1. Chamber Pressure: 157.00 bar. Area Ratio: 26.00. Oxidizer to Fuel Ratio: 2.67. Country: Russia. Status: In Production. First Flight: 1986. Last Flight: 1999. Flown: 438. References: 98 , 322 . Comments: Uprated version of RD-253, developed in the 1980's.
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Last update 12 March 2001.
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© Mark Wade, 2001 .