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RD-225
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Manufacturer Name: RD-225. Designer: Glushko. Developed in: 1960-62. Application: R-26 stage 1. Propellants: Nitric acid/UDMH. Thrust(vac): 889.000 kN (199,855 lbf). Isp: 294 sec. Isp (sea level): 251 sec. Burn time: 100 sec. Chambers: 2. Chamber Pressure: 83.40 bar. Area Ratio: 21.00. Oxidizer to Fuel Ratio: 2.50. Country: Russia. Status: Out of Production. First Flight: 1961. Two clustered together to make RD-224.
Bibliography and Further Reading - Glushko, V P, Albom Konstruktsiy ZhRD, Vol. 1 1968, Vol. 3 & 4 1969 via Dietrich Haeseler.
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