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 + 11D43 used on Rocket Stages

Used on stage: UR-500 Monoblok Stage 1M. on launch vehicle: Monoblock UR-500.

Used on stage: UR-500 Polyblock Stage 1P. on launch vehicle: Polyblock UR-500.

Bibliography and Further Reading

Afanasyev, Igor, Novosti kosmonavtiki, "35 let RN Proton", 1998, Issue 5, page 40.

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