EngineArchimedesDrag to turn · Space takes it apart730 kN · 500 kg · cold
Archimedes by Rocket Lab: staged, oxidizer-rich engine burning CH4 / LOX (development). Thrust 730 kN at sea level, 890 kN in vacuum. 100 bar chamber pressure, 329 s specific impulse at sea level, 366 s in vacuum, 500 kg dry. Figures from the database's engine record. Proportions are estimated.