RD-261 home
topic index
Engine Model: RD-261. Manufacturer Name: RD-261. Designer: Glushko. Developed in: 1967-69. Application: Tsyklon 3 stage 1. Propellants: N2O4/UDMH. Thrust(vac): 3,032.000 kN (681,620 lbf). Isp: 301 sec. Isp (sea level): 270 sec. Burn time: 120 sec. Mass Engine: 1,764 kg (3,888 lb). Diameter: 0.75 m (2.44 ft). Length: 1.76 m (5.78 ft). Chambers: 6. Chamber Pressure: 83.00 bar. Area Ratio: 14.70. Oxidizer to Fuel Ratio: 2.60. Thrust to Weight Ratio: 175.27. Country: Russia. Status: In production. First Flight: 1977. Last Flight: 2004. Flown: 121.

Based on RD-251

RD-261 used on Rocket Stages
Bibliography:

  • Russian Arms Catalogue, Vol 5 and 6, Military Parade, Moscow via Dietrich Haeseler.
  • Siddiqi, Asif A, Soviet Space Web Page, 1999 via Dietrich Haeseler. Web Address when accessed: http://home.earthlink.net/~cliched/main_space.html.
  • GKB Yuzhnoe "Yangel", Data sheets Paris Airshow 1997 via Dietrich Haeseler.
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© Mark Wade, 1997 - 2008 except where otherwise noted.