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<h1>OpenRocket — an Open Source model rocket simulator</h1>
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<h2>Introduction</h2>
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<p><strong>OpenRocket</strong> is a free, fully featured model
rocket simulator that allows you to design and simulate your
rockets before actually building and flying them.</p>
<p>The main features include:</p>
<ul>
<li>Six-degree-of-freedom flight simulation</li>
<li>Automatic design optimization</li>
<li>Realtime simulated altitude, velocity and acceleration display</li>
<li>Staging and clustering support</li>
<li>Cross-platform (Java-based)</li>
</ul>
<p>Read more about its <a
href="features.html">features and see screenshots</a>.
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<p>OpenRocket is an Open Source project licensed under the
<a href="license.html">GNU GPL</a>. This means that the
software is free to use for whatever purposes, and the source
code is also available for studying and extending.
</p>
<p>OpenRocket needs help to become even better. Implementing
features, writing documentation and creating example designs are
just a few ways of helping. If you are interested in helping
make OpenRocket the best rocket simulator out there, please
<a href="getinvolved.html"><em>Get involved!</em></a>
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<div class="news">
<h2>News</h2>
<p><span class="date">10.3.2012:</span> Version 12.03 for desktop
and Android is <a href="download.html">released</a>!</p>
<p>In this release the version numbering scheme has been changed.
From now on the version number is <em>YY.MM</em> indicating the
year and month of the release. Bug fix releases are indicated by
an added "<em>.1</em>".</p>
<p>This also marks the first release for Android devices. In this
first release you can open files and examine existing simulations,
stability data and motor files. The Android port is thanks to
work by Kevin Ruland.</p>
<p>Enhancements in the desktop version include saving designs in RKT
format thanks to Doug Pedrick, freeform fin set import form images
by Jason Blood, configurable stage separation
events, guided help tours and displaying the computed motor
designation class. The application has also been translated to
Italian by Mauro Biasutti and Russian by the Sky Dart Team.</p>
<p><span class="date">24.11.2011:</span> Version 1.1.9 is
<a href="download.html">released</a>!</p>
<p>For this version Richard Graham has implemented geodetic
computation methods, which take into account the curvature of the
Earth and the coriolis effect. The computation method is selected
by the <em>Geodetic calculations</em> option in the simulation
options. It's not <em>(yet)</em> a full spherical computation model, but
should be accurate enough for almost all sub-orbital needs.</p>
<p>Doug Pedrick has also enhanced the printing system with the
ability to print fin positioning guides, transition templates and
nose cone profiles. Other smaller enhancements and bug fixes are
also included.</p>
<p><span class="date">25.8.2011:</span> Version 1.1.8 is
<a href="download.html">released</a>!</p>
<p>This release contains bug fixes to the optimization methods.
It also contains a workaround to a JRE bug that prevents running
OpenRocket on some builds of Java 7.</p>
<p>The web pages have also been somewhat updated and Boris du Reau has
created <a href="http://openrocket.trans.free.fr/">a separate site</a>
for coordinating the localization efforts for OpenRocket.</p>
<p><span class="date">12.8.2011:</span> Version 1.1.7 is
<a href="download.html">released</a>!</p>
<p>This release includes automatic rocket design optimization
support (<em>Analyze</em> → <em>Rocket optimization</em>).
You can optimize any amount of rocket parameters for apogee
altitude, maximum velocity or a number of different values.</p>
<p>While the automatic optimization is a powerful tool, it is very
easy to optimize against particulars of the simulation methods,
instead of true physical phenomena. Always keep common sense at
hand and take the results with a grain of salt.</p>
<p><span class="date">22.7.2011:</span> Version 1.1.6 is
<a href="download.html">released</a>!</p>
<p>This release includes initial localization support and
translations to French, German and Spanish. This is thanks to the
great work of Boris du Reau, and the teams from Tripoli France,
Tripoli Spain and ERIG e.V. If you prefer to use some other
language than the system default, you can select the language on
the "Options" tab of the preferences dialog.</p>
<p>The release also includes design scaling support and numerous bug
fixes.</p>
<p><span class="date">10.6.2011:</span> Version 1.1.5 is
<a href="download.html">released</a>!</p>
<p>This release includes updates to the printing system which fixes
printing on Windows.</p>
<p><span class="date">5.3.2011:</span> Version 1.1.4 is
<a href="download.html">released</a>!</p>
<p>This release includes initial printing support, thanks to Doug
Pedrick. Printing still has a few issues on some platforms.
Various bugs have also been fixed.</p>
<p><span class="date">6.10.2010:</span> Version 1.1.3 is
<a href="download.html">released</a>!</p>
<p>This release includes support for moving and copying components
in the component tree using drag-and-drop. Use normal DnD for
moving, and control-drag for copy. This release also fixes a
severe bug in the undo system.</p>
<p><span class="date">7.9.2010:</span> A bug-fix version 1.1.2 is
<a href="download.html">released</a>!</p>
<p>This release fixes a severe bug in 1.1.1 that prevented adding stages
to rocket designs. Users are recommended to upgrade.</p>
<p><span class="date">3.9.2010:</span> Version 1.1.1 is
<a href="download.html">released</a>!</p>
<p>For this release a major part of the simulator code has been
rewritten for better flexibility in future development. It also
includes a vastly improved thrust curve selection dialog, the
possibility to loading user-defined thrust curves and better
startup times than previous releases.</p>
<p>Simulation listeners written for older versions of OpenRocket
are not compatible with this release.</p>
<p><span class="date">21.3.2010:</span> Version 1.1.0 is
<a href="download.html">released</a>!</p>
<p>This release includes the first support for loading RockSim
rocket design files (.RKT), thanks to contributions by Doug
Pedrick. It's also the kick-off of the 1.1 development branch of
OpenRocket.</p>
<p><span class="date">10.3.2010:</span> Version 1.0.0 is
<a href="download.html">released</a>!</p>
<p>This release includes several hundred new thrustcurves from
<a href="http://www.thrustcurve.org/">thrustcurve.org</a> and some
bug fixes. It is also a stable milestone, after which development
on larger features will be started in a 1.1 branch. Look out
for it! :-)</p>
<p><span class="date">17.2.2010:</span> Version 0.9.6 is
<a href="download.html">released</a>!</p>
<p>This release updates the aerodynamic calculation methods to be
more in line with the Barrowman method and enhances the simulation
time step selection, in addition to fixing numerous bugs.</p>
<p><span class="date">28.11.2009:</span> Version 0.9.5 is
<a href="download.html">released</a>!</p>
<p>This release <strong>fixes a serious bug in 0.9.4</strong> that
prevented adding a tube coupler and centering ring to the same
body tube, in addition to a few smaller additions. Users of
0.9.4 should upgrade immediately!</p>
<p><span class="date">24.11.2009:</span> Version 0.9.4 is
<a href="download.html">released</a>!</p>
<p>This version adds support for through-the-wall fin tabs,
attaching components to coupler tubes, material editing, automatic
update checking, in addition to fixing numerous bugs.</p>
<p><span class="date">1.9.2009:</span> Version 0.9.3 is
<a href="download.html">released</a>!</p>
<p>This version includes lots of bug fixes and new features including
data exporting, showing flight events in plots, example rocket designs,
splitting clustered inner tubes and automated bug reporting.</p>
<p><span class="date">13.7.2009:</span> Version 0.9.2 is
<a href="download.html">released</a>!</p>
<p>This version includes <strong>bug fixes for imperial unit
conversions</strong> and UI improvements for motor selection.
<em>All users of imperial units should upgrade!</em></p>
<p><span class="date">9.6.2009:</span> The
<a href="documentation.html">Master's thesis</a> for which OpenRocket
was written for is now available!</p>
<p>At the same time version 0.9.1 was
<a href="download.html">released</a>. This release fixes various
file handling bugs and adds small UI enhancements.</p>
<p><span class="date">24.5.2009:</span> First version 0.9.0
<a href="download.html">released</a>!</p>
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