Rocket Simulator

What it does

Rocket Simulator is a browser-based tool for designing and launching virtual rockets. Users build multi-stage rockets using a rocket builder where they adjust engine thrust, specific impulse, propellant mass, payload, and fairing. Then they fly the rockets through several modes: manual control with hand-flown trajectories, guided modes with automated or computed trajectories, or orbital spawn for practicing maneuvers in space. The simulation models atmospheric drag based on the US Standard Atmosphere 1976, multi-stage separation, dynamic pressure, and the Tsiolkovsky rocket equation. Live telemetry displays altitude, velocity, Mach number, apoapsis, and periapsis during flight.

Who it is for

The tool targets people learning orbital mechanics and rocket physics. Students can experiment with how thrust-to-weight ratio, staging, and delta-v affect the ability to reach orbit. The creator describes it as an educational simulation, though it has evolved toward realism. Players can practice gravity turns and perform orbital maneuvers like plane changes and rendezvous burns. The simulator works on desktop and mobile with no download or account required.

Pricing

Free. The site does not show any premium tier or pricing options.

How it stands out

The simulator emphasizes realistic physics including aerodynamic forces, gimbal control, and structural failure modes. It includes a custom guidance algorithm option where users can input their own node graph to fly, with a Gauss-Newton solver available for computing optimal cubic thrust-angle profiles. The rocket builder allows full customization before flight, and multiple flight modes cater to different skill levels and learning goals—from manual flying with full pitch control to orbital spawns that skip the launch phase entirely.

What a founder should check

A competitor should verify what educational incumbents already exist in this space, including free tools like Kerbal Space Program and paid options, and whether switching to a custom solution offers real advantages. Second, understand the technical depth users expect: whether the physics accuracy and telemetry detail match what aerospace educators and hobbyists demand, or if simpler mechanics suffice for the target audience. Third, assess whether browser-based access and the no-download model deliver enough stickiness to compete against installed simulation software that may offer deeper features or higher fidelity.