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8D43 + 11D43
Part of RD-0202 Family
Kosberg N2O4/UDMH rocket engine. Design 1962. Originally the first stage of the Proton was designed for 4 x fixed 11D43 and 4 x gimbaled Kosberg 8D43; replaced by 6 x 11D48 from Glushko in final Proton design.

Status: Design 1962. Thrust: 2,247.45 kN (505,247 lbf). Specific impulse: 310 s. Specific impulse sea level: 280 s. Burn time: 115 s.

Thrust (sl): 1,980.000 kN (445,120 lbf). Thrust (sl): 202,000 kgf.

Family: Storable liquid. Country: Russia. Launch Vehicles: Monoblock UR-500, Polyblock UR-500. Propellants: N2O4/UDMH. Stages: Monoblock UR-500-1M, Polyblock UR-500-1P. Agency: Kosberg bureau.



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