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RD-550
Part of RD-301 Family
Glushko exotic rocket engine. Experimental upper stage engine. Developed 1963-70. Propellants LOx/30% Beryllium+Pentaborane in 70% Hydrazine.

Status: Developed 1963-70. Date: 1963-70. Thrust: 98.06 kN (22,045 lbf). Specific impulse: 400 s.

Toxic exotic propellant engine studied by Glushko in 1963-1970. The specific impulse would have been between 360 and 400 seconds. This was one of the category B engines that had to be developed by OKB-456 Filial 1 because test of the extremely toxic propellants was impossible at Khimki. The notes to Korolev's memoirs report a different propellant combination was considered in 1963, in the earliest design stage of the engine: H2O2/Hydrazine with 30% beryllium additive only.



Family: Exotic. Country: Russia. Propellants: Lox/Beryllium+Pentaborane in Hydrazine 30%/70%. Agency: Glushko bureau. Bibliography: 283.

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