Build and fly in this free online rocket simulator. Use the rocket builder to design your vehicle, launch to orbit with realistic physics, and practice rocket landing control and orbital mechanics directly in your browser.
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► FLIGHT MODE
Guided modes unavailable for custom rockets — use Manual or Orbital
Use W/S keys to control pitch angle. Guidance system provides heading recommendations. High skill ceiling — full control over trajectory.
Set a target altitude and let the guidance system manage the entire ascent. PID controller handles pitch program and orbit insertion.
Note: this guidance is a very old hand-developed system and does not yet work reliably with newer structural changes.
A Gauss-Newton solver computes the optimal cubic thrust-angle profile to reach the target orbit. Solver output printed to console.
Note: this guidance is a very old hand-developed system and does not yet work reliably with newer structural changes.
Skip the launch phase — spawn directly in a circular orbit with limited fuel. Ideal for burns, plane changes, and rendezvous practice.