RD-0110
The RD-0110 (Russian: Ракетный Двигатель-0110, romanized: Raketnyy Dvigatel-0110, lit. 'Rocket Engine 0110', and its derivatives, the RO-8, RD-0108, RD-461) is a rocket engine burning liquid oxygen and kerosene in a gas generator combustion cycle. It has four fixed nozzles and the output of the gas generator is directed to four secondary vernier nozzles to provide attitude control for the stage.