Raptor Engine — Gemini 3.8 Flash one-shot demo

Telemetry Readouts SN-148 // V2

Chamber Press (Pc) 330.0 bar

Thrust (Sea Level) 2,250 kN

ISP (SL / Vac) 327s / 363s

O/F Mass Ratio 3.60 : 1

LOX Turbopump 28,400 RPM

CH4 Turbopump 34,200 RPM

Throat Thermal Load 298 K

Cycle Architecture

Full-Flow Staged Combustion (FFSC): 100% of liquid oxygen passes through the oxygen preburner driving the LOX turbine; 100% of methane fuel passes through the fuel preburner driving the fuel turbine. Clean gas-gas combustion maximizes specific impulse and chamber pressure while reducing seal stress.

Propellant Flow Paths

Liquid Oxygen (Subcooled -183°C)

Liquid Methane (Cryogenic -161°C)

Preburner Hot Gases (Gas-Gas Inject)

Main Combustion Gas (3,300°C)

Controls: WASD or ←→ Orbit / Tilt R Reset Drag / Scroll

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Subsystem Name