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Model of RD-0146
Model of RD-0146
Country of Origin  Russia
Date 2001
Designed by KBKhA Design Bureau
Manufacturer TsSKB Progress
Application Upper stage booster
Predecessor RD-0124
Status In use
Liquid-fuelled engine
Propellant LOX / LH2
Cycle Expander cycle
Thrust(Vac) 98.100 kN (22,054 lbf)
Chamber pressure 79.00 bar
Isp(Vac) 463 sec
length 2.2 m
Diameter 0.71 m
Dry weight 242 kg

The RD-0146 is a Russian cryogenic rocket engine developed in collaboration with Pratt & Whitney Rocketdyne. It is said to be the Russian version of the Pratt & Whitney Rocketdyne RL10 engine.[1] The RD-0146 engine was developed by KBKhA design bureau in Voronezh, Russia, in cooperation with the American firm Pratt & Whitney Rocketdyne. In 2009, it came into prominence, as Russian space agency chose it for the second-stage of the Rus-M launch vehicle designed to carry the future Russian PPTS manned spacecraft.[2]



In 1997, Khrunichev enterprise, the manufacturer of the Proton rocket, assigned KBKhA to develop a new cryogenic engine with the thrust of 100 kN and equipped with a nozzle extension for the best performance at high altitude. The vehicle was supposed to power the upper stage of the upgraded Proton rocket and the next-generation Angara family of launch vehicles.

In 1999, Khrunichev requested KBKhA to develop RD-0146U version of the engine for Proton and Angara rockets. The development of was partially financed by Pratt & Whitney Rocketdyne. Pratt & Whitney signed a preliminary marketing agreement on April 7, 2000 with Russia’s Chemical Automatics Design Bureau giving Pratt & Whitney exclusive international marketing rights to the RD-0146.[2]


The RD-0146 is the first Russian rocket engine not to feature a gas generator and to be equipped with extendable nozzle extension without a cooling system. The engine is capable of multiple firings and thrust control in two planes. According to the developer, the lack of generator ensures high reliability of the engine for multiple firings.

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