RD-107

RD-107
	Rocket engine RD-107 "Vostok" in the Museum of Space and Missile Technology (Saint Petersburg).
Country of origin	Soviet Union, later Russia
Designer	OKB-456
Manufacturer	JSC Kuznetsov
Application	Booster engine
Associated LV	R-7 family of launchers
Predecessor	RD-105
Status	In production
Liquid-fuel engine
Propellant	LOX / kerosene
Cycle	Gas-generator cycle
Performance
Thrust, vacuum	RD-107: 1,000 kN (220,000 lbf); RD-107A: 1,020 kN (230,000 lbf)
Thrust, sea-level	RD-107: 810 kN (180,000 lbf); RD-107A: 839 kN (189,000 lbf)
Specific impulse, vacuum	RD-107: 313 s; RD-107A: 320.2 s
Specific impulse, sea-level	RD-107: 256 s; RD-107A: 263.3 s
Dimensions
Dry weight	RD-107: 1,190 kg (2,620 lb); RD-107A: 1,190 kg (2,620 lb)
Used in
	First stage boosters for R-7 family
References
References

The RD-107 and its sibling, the RD-108, are a type of rocket engine initially used to launch R-7 Semyorka missiles. RD-107 engines were later used on space launch vehicles based on the R-7. As of 2021^[update], very similar RD-107A and RD-108A engines are used to launch the Soyuz-2.1a, and Soyuz-2.1b, which are in active service.^[7]

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