Group : Rocket Engines
Status : Retired - No Longer Operational
Origin : Russia
Contractor : NPO Energomash
Initial Operational Capability (IOC) : 1988
First Flight : April 13, 1985
Total Production : ?

The RD-170 is the most powerful liquid fuel rocket engine ever designed and fielded. It was developed by the former Soviet Union in the 1980s to power the Energia massive rocket engine intended as the launch vehicle for the Buran spaceship. The engine burns a mixture of RP-1 and Liquid Oxygen (LOx) in four combustion chambers developing a lift-off power of 170 MW. The RD-170 engine was completed in the late 1980s and entered into service for a short period of time and then retired. Nevertheless the RD-170 engine design has been utilized for the development of other engines used by Russia and the United States of America (USA).

Group : Rocket Engines
Status : Active
Also Known As : RD-171M
Origin : Russia
Contractor : NPO Energomash
Initial Operational Capability (IOC) : 2006
Total Production : ?

The RD-171 is a derivative of the RD-170 liquid fuel rocket engine keeping the four combustion chambers used on the RD-170 engine. The RD-171M engine variant development was completed in 2006 powering the Zenit-2 space launch system.

Group : Rocket Engines
Status : Active
Also Known As : RD-171MB
Origin : Russia
Contractor : NPO Energomash
Initial Operational Capability (IOC) : August 25, 2022
First Flight : February 2019
Total Production : ?

The RD-171MV rocket engine variant has been selected to power the first stage of the Soyuz-5 medium-weight space launch system beginning in 2022. In addition the engine was selected to power the Yenisei super heavy space rocket beginning in 2028. The RD-171MV burns a mixture of liquefied natural gas (LNG) and liquefied Oxygen (LOx) and delivers 180 MW of power output. The engine was unveiled in March 2019 and is expected to lift-off for the first time along with the Soyuz-5 rocket in 2022.