https://github.com/openrocket/openrocket

Model-rocketry aerodynamics and trajectory simulation software

OpenRocket is a free, fully featured model rocket simulator that allows you to design and simulate your rockets before actually building and flying them.

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1. Design your rockets using a rich selection of built-in components:

2. Visualize your masterpiece in 3D:

3. Plot & Analyze your simulation results for precision and improvements:

• Six-degree-of-freedom flight simulation
• Automatic design optimization
• Realtime simulated altitude, velocity, and acceleration display
• Staging and clustering support
• Export to other simulation programs (RockSim, RASAero II)
• Export component(s) to OBJ file for 3D printing or SVG for laser cutting
• Cross-platform (Java-based)

... plus many more

📖 Read more on our website.

You can find the OpenRocket installers here.

Release notes are available on each release's page or on our website.

You can find our documentation on ReadTheDocs.

Check out our documentation for a detailled guide on how to get started.

The easiest way to get familiar with OpenRocket is to open one of our in-program example designs:

Dive into the essentials: adjust component dimensions, plot a simulation, swap out motors, ... Explore the impact of your changes and, most importantly, enjoy the process! 😊

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Note: If you have an OpenRocket-related project you would like included in the list, you can file a new issue for it.

Project	Type	Description
openrocket/openrocket	Core project	Main simulator (Java)
openrocket/openrocket.github.io	Website source	Website content (Jekyll)
openrocket/openrocket-database	Data enhancement	Expanded parts catalog (originally dbcook/openrocket-database)

Project	Type	Description
openrocket/orhelper	Integration (Python)	Python scripting/module for OpenRocket (via JPype) (forked from SilentSys/orhelper)
RocketPy-Team/RocketSerializer	Integration (Python)	Convert .ork files to RocketPy-compatible formats
SpaceTeam/ortools	Integration Tools (Python)	Scripts like 6DOF landing scatter visualization
schrum2/OpenRocketQD	Optimization tool (Python)	Quality Diversity optimization for rocket designs
waterloo-rocketry/or-monte-carlo	Simulation tool (Java)	Monte Carlo simulation wrapper for OpenRocket

Project	Type	Description
SpaceTeam/ORLEG	Engine modeling (Python)	Liquid-engine generator for OpenRocket
WPI-HPRC/ORBrake (archived)	Plugin (Java)	Active drag control (air-brakes)

Project	Type	Description
ORWind	Atmospheric data utility	Fetches/imports multi-level wind data for OpenRocket
Aloft	Weather data utility	Retrieves weather/atmospheric profiles (winds, temp, pressure) for flight simulation

Project	Type	Description
FreeCAD Rocket Workbench	CAD workbench	A rocket design workbench for FreeCAD that can import OpenRocket .ork files

Project	Type	Description
TrinetraOne-OpenRocket	Example designs	Showcase rocket project

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Help us soar higher! Whether it's implementing features, writing documentation, or creating design examples, every contribution matters. Interested? Check out how to get involved and the practicalities of contributing.

• Sampo Niskanen - Original developer
• Doug Pedrick - RockSim designs, printing
• Kevin Ruland - Android version
• Bill Kuker - 3D visualization
• Richard Graham - Geodetic computations
• Jason Blood - Freeform fin set import
• Boris du Reau - Internationalization
• Daniel Williams - Pod support, maintainer
• Joe Pfeiffer - Maintainer
• Billy Olsen - Maintainer
• Sibo Van Gool - RASAero file format, 3D OBJ export, dark theme, maintainer
• Neil Weinstock - Tester, icons, forum support
• H. Craig Miller - Tester

You can view the full list of contributors here.

• Tripoli France
• Tripoli Spain
• Stefan Lobas / ERIG
• Mauro Biasutti
• Sky Dart Team / Ruslan V. Uss
• Vladimir Beran
• Polish Rocketry Society / Łukasz & Alex Kazanski
• Sibo Van Gool
• Mohamed Amin Elkebsi
• Oleksandr Hladin

OpenRocket is proudly open-source under the GNU GPL license. Feel free to use, study, and extend.

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⭐ Please give us a star if you find OpenRocket useful, and spread the word! ⭐