RD-191
The RD-191 Engine is being developed in Russia by the famous Energomash with its revolutionary RD-170 (built for Energia Heavy Lift Rocket) and it half sized RD-180 built for the American Atlas rockets.
The RD-191 is a high performance single-combustion chamber rocket engine.
As with the older RD-170 and the RD-180 design the RD-191 is fueled by a kerosene / LOX mixture and uses an oxygen-rich staged combustion cycle using LOX and RP-1.
RD-191 engine infograph
Technical specifications of the RD-191 engine:
Thrust at sea level 196 tons
Thrust in vacuum 212.6 tons
Specific impulse at the sea level 311.2 seconds
Specific impulse in vacuum 337.5 seconds
Height 3,780 millimeters
Diameter 2,100 millimeters
Dry mass 2,200 kilograms
Fueled mass 2,430 kilograms
Combustion chamber pressure 262.6 kilograms per square centimeter
RD-191M engine
During the 2010s, NPO Energomash was working on the RD-191M engine, which was intended for the Angara-5 and Angara-5V rockets. The engine was test-fired in 2016, reaching 110 percent above the thrust of the original variant.