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Cryogenic Propellant Loading Control (2D)

Interactive 2D cryogenic fueling simulator: drive a closed-loop valve controller that loads LOX and LH2 into a rocket's tanks toward a target oxidizer/fuel mass ratio while the ideal gas law (PV=nRT) governs ullage pressure, boil-off and automatic venting.

Aerospace Engineering & Orbital Mechanics2DModerate60 FPS📱 Mobile-adapted💧 Water 💨 Air & Wind ❄️ Ice & Cold ⇄ 3D version

This simulator models the automated fueling sequence at a launch pad: a closed-loop valve controller meters liquid oxygen and liquid hydrogen into a rocket's onboard tanks toward a target oxidizer-to-fuel mass ratio, while the ideal gas law governs how ullage pressure rises as each tank fills and as ambient heat boils off a trickle of vapor. An automatic relief valve vents vapor whenever pressure crosses your chosen setpoint, mirroring the real safety systems used during cryogenic propellant loading before launch. Tune the mixture ratio, valve flow rate, heat leak and vent setpoint and watch the two tank cross-sections — and their pressures — respond in real time.

⚙ Under the hood

Control valves to load liquid oxygen and hydrogen into rocket tanks, aiming for a target mixture ratio while monitoring ullage pressures.

rocket fuelingcryogenicscontrol systemsideal gas lawaerospace engineering

2D · HTML5 Canvas 2D · 60 FPS target · runs fully client-side, no install