Cycle Full-flow staged combustion Oxidizer Subcooled liquid oxygen Fuel Subcooled liquid methane Chamber Pressure 300 bar Throttle Capability 20% to 100% thrust Sea-Level Nozzle Expansion Ratio: 40 Thrust (SL): 3,050 kN Isp (SL): 334 s Vacuum Nozzle Expansion Ratio: 200 Thrust: 3,500 kN Isp: 382 s