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astronautix.com RD-261


Manufacturer Name: RD-261. Designer: Glushko. Developed in: 1967-69. Application: Tsyklon 3 stage 1. Used on stages: Tsyklon 3-1. Used on launch vehicles: Tsyklon 3. Propellants: N2O4/UDMH Thrust(vac): 309,178 kgf. Thrust(vac): 3,032.00 kN. Isp: 301 sec. Isp (sea level): 270 sec. Burn time: 120 sec. Mass Engine: 1,764 kg. Diameter: 0.7 m. Length: 1.8 m. Chambers: 6. Chamber Pressure: 83.00 bar. Area Ratio: 14.70. Oxidizer to Fuel Ratio: 2.60. Country: Russia. Status: In Production. First Flight: 1977. Last Flight: 1998. Flown: 117. References: 342 , 344 , 349 . Comments: Based on RD-251.
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Last update 12 March 2001.
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