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8D43 engine
Credit - © Mark Wade
Engine Model: 8D43. Government Designation: 8D43. Designer: Kosberg. Application: UR-500 stage 1 original concept. Propellants: N2O4/UDMH. Thrust(vac): 559.000 kN (125,668 lbf). Thrust(sl): 599.813 kN (134,843 lbf). Isp: 316 sec. Isp (sea level): 284 sec. Burn time: 115 sec. Chambers: 1. Chamber Pressure: 147.00 bar. Area Ratio: 28.50. Oxidizer to Fuel Ratio: 2.60. Country: Russia. Status: Hardware.

Low-expansion ratio gimballed variant developed for UR-500. In initial configuration 4 would be clustered with 4 x Glushko 11D43. Abandoned in favor of 6 x Glushko 11D48. Further developed into the RD-0208 and RD-0210 engines.

Engine Model: 8D43 + 11D43. Government Designation: 8D43 + 11D43. Designer: Kosberg. Application: UR-500 stage 1 original concept. Propellants: N2O4/UDMH. Thrust(vac): 2,247.450 kN (505,247 lbf). Thrust(sl): 1,980.000 kN (445,120 lbf). Isp: 310 sec. Isp (sea level): 280 sec. Burn time: 115 sec. Chambers: 1. Country: Russia. Status: Design 1962.

Originally the first stage of the Proton was designed for 4 x fixed 11D43 and 4 x gimballed Kosberg 8D43 (see separate entries for each engine for details of those engines). This configuration was replaced by 6 x 11D48 from Glushko.

8D43 used on Rocket Stages
Bibliography:

  • Afanasyev, Igor, Novosti kosmonavtiki, "35 let RN Proton", 1998, Issue 5, page 40.
  • Glushko, V P, Albom Konstruktsiy ZhRD, Vol. 1 1968, Vol. 3 & 4 1969 via Dietrich Haeseler.
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