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RD-107

RD-107
RD-107 engine on display at the Museum of Space and Missile Technology in Saint Petersburg.
Country of origin Soviet Union
 Russia
DesignerOKB-456
ManufacturerJSC Kuznetsov[1]
ApplicationBooster/first stage
Associated LVR-7 family
PredecessorRD-105
StatusIn production
Liquid-fuel engine
PropellantLOX / RP-1
CycleGas-generator
Performance
Thrust, vacuum1,020 kN (230,000 lbf)
Thrust, sea-level839 kN (189,000 lbf)
Specific impulse, vacuum320.2 s (3.140 km/s)
Specific impulse, sea-level263.3 s (2.582 km/s)
Dimensions
Dry weight1,190 kg (2,620 lb)
References
References[2][3][4][5][6]
NotesPerformance figures are for RD-107A

The RD-107 and its sibling, the RD-108, are a type of rocket engine used on the R-7 rocket family. RD-107 engines are used in each booster and the RD-108 is used in the central core. The engines have four main combustion chambers (each a with nozzle) and either two (RD-107) or four (RD-108) vernier chambers.

The engines were first developed in the mid-1950s to launch the R-7 Semyorka, the first intercontinental ballistic missile. The R-7 was later adapted into space launch vehicles and the engines have been improved over several generations. The most recent versions are the RD-107A and RD-108A engines are used to launch the Soyuz-2, which is in active service as of 2024.

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