EngineRD-171MDrag to turn · Space takes it apart7,257 kN · 9,750 kg · cold
RD-171M by NPO Energomash: staged, oxidizer-rich engine burning RP-1 / LOX (active). Thrust 7,257 kN at sea level, 7,887 kN in vacuum. 250 bar chamber pressure, 309 s specific impulse at sea level, 337 s in vacuum, 9,750 kg dry. 4 combustion chambers share one turbopump. Figures from the database's engine record. Drawn to the published length and diameter (RD-170) (Wikipedia); other proportions are estimated.