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<h1>OpenRocket — an Open Source model rocket simulator</h1>
<p><spanclass="date">28.03.2015:</span> Version 15.03 is
<ahref="download.html">released</a>! This release contains scriptable simulation extensions and experimental support for tube fins along with many additional improvements.
<p><spanclass="date">02.11.2014:</span> Version 14.11 is
<ahref="download.html">released</a>! This release contains very few changes. Thrustcurves have been updated and now include AeroTech DMS motors. A few bugs have been fixed.
</p>
<p><spanclass="date">25.06.2014:</span> Version 14.06 is
<ahref="download.html">released</a>! This release contains very minimal changes. It fixes an annoying bug in tables that many people experience. A texture is added for Klima motors.
</p>
<p><spanclass="date">21.05.2014:</span> Version 14.05 is
<ahref="download.html">released</a>! This release contains some minor features,
bug fixes and updated thrust curves. New motor vendors Klima and Southern
Cross Rocketry are included. The simulation will now compute optimum delay based
on actual coast time. Components with CG and mass overrides are decorated with
an icon in the component tree.
</p>
<p><spanclass="date">21.03.2014:</span> Version 14.03 is
<ahref="download.html">released</a>! This release contains the
new photo realistic renderer (in the Tools menu) which allows one to visualize
the rocket in the air. There are various bug fixes in the configuration
and motor selection windows as well.
</p>
<p><spanclass="date">01.01.2014:</span> Version 13.11.2 is
<ahref="download.html">released</a>! This release contains bug fixes,
usability improvements, and layout fixes.
</p>
<p><spanclass="date">15.11.2013:</span> Version 13.11.1 is
<ahref="download.html">released</a>! This release contains bug fixes
including fixing Tube Coupler configuration, various exceptions in
the flight configuration tab, updated 3d libraris (which didn't really make
it into previous versions).</p>
<p><spanclass="date">8.11.2013:</span> Version 13.11 is
<ahref="download.html">released</a>! This release simplifies
flight configurations by replacing the dialog with the configuration
tab. Motor filtering in the motor chooser dialog has been enhanced.
Chineese translations have been added and Russian translations updated.
Updated the 3D libraries, and squashed some bugs introduced by Java 1.7.0_45-b18.</p>
<p><spanclass="date">6.10.2013:</span> Version 13.09.1 is
<ahref="download.html">released</a>! This is a bug-fix release,
and includes updated 3D libraries and new thrust curves for
Aerotech C3 and D2.</p>
<p><spanclass="date">8.9.2013:</span> Version 13.09 is
<ahref="download.html">released</a>! This release contains
numerous bug fixes, updated 3D JOGL libraries, and separated
simulation edit and plot dialogs.</p>
<p><spanclass="date">4.5.2013:</span> Version 13.05 is
<ahref="download.html">released</a>! This release contains a huge
number of improvements, the main ones including realistic 3D
rendering with decals, flight configurations, lower stage descent
simulation, boosted dart support and new translations for
Portuguese and Japanese. These are thanks to many
contributors.</p>
<p>Version 13.05 also changes the file format to be ZIP-based.
Versions earlier than 12.03 will not be able to read files saved
by this version.</p>
<p><spanclass="date">28.9.2012:</span> Version 12.09.1 is
<ahref="download.html">released</a>! This is a bug-fix release,
fixing numerous bugs introduced in 12.09. The only new feature is
the option to automatically open the latest design file on startup
(in <em>Edit</em>→<em>Preferences</em>→<em>Options</em>).
<p><spanclass="date">23.9.2012:</span> Version 12.09 for Android is
<ahref="download.html">released</a>! The major improvement is the
possibility to edit simulation parameters, thanks to work by Kevin
Ruland.</p>
<p><spanclass="date">16.9.2012:</span> Version 12.09 is
<ahref="download.html">released</a>!</p>
<p>This version contains a huge number of new features by many contributors:</p>
<ul>
<li>3D rocket design view</li>
<li>Component Presets</li>
<li>Custom expressions in simulations</li>
<li>Printing for centering ring and clustered centering ring components</li>
<li>Support simple arthmatic in dimension entry</li>
<li>Support deploying recovery device at stage separation</li>
<li>Support for fractional inches (1/64) for unit length</li>
<li>Added preference for windspeed units separately</li>
<li>Added "most recently used files" in File Menu</li>
<li>Improved printed accurracy in fin marking guide</li>
<li>Calibration rulers added to printed templates</li>
<li>Translations in Czech and Polish, numerous updates</li>
</ul>
<p><spanclass="date">10.3.2012:</span> Version 12.03 for desktop
and Android is <ahref="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><spanclass="date">24.11.2011:</span> Version 1.1.9 is
<ahref="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><spanclass="date">25.8.2011:</span> Version 1.1.8 is
<ahref="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 <ahref="http://openrocket.trans.free.fr/">a separate site</a>
for coordinating the localization efforts for OpenRocket.</p>
<p><spanclass="date">12.8.2011:</span> Version 1.1.7 is
<ahref="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><spanclass="date">22.7.2011:</span> Version 1.1.6 is
<ahref="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><spanclass="date">10.6.2011:</span> Version 1.1.5 is
<ahref="download.html">released</a>!</p>
<p>This release includes updates to the printing system which fixes
printing on Windows.</p>
<p><spanclass="date">5.3.2011:</span> Version 1.1.4 is
<ahref="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><spanclass="date">6.10.2010:</span> Version 1.1.3 is
<ahref="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><spanclass="date">7.9.2010:</span> A bug-fix version 1.1.2 is
<ahref="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><spanclass="date">3.9.2010:</span> Version 1.1.1 is
<ahref="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><spanclass="date">21.3.2010:</span> Version 1.1.0 is
<ahref="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><spanclass="date">10.3.2010:</span> Version 1.0.0 is
<ahref="download.html">released</a>!</p>
<p>This release includes several hundred new thrustcurves from
<ahref="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><spanclass="date">17.2.2010:</span> Version 0.9.6 is
<ahref="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><spanclass="date">28.11.2009:</span> Version 0.9.5 is
<ahref="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><spanclass="date">24.11.2009:</span> Version 0.9.4 is
<ahref="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><spanclass="date">1.9.2009:</span> Version 0.9.3 is
<ahref="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><spanclass="date">13.7.2009:</span> Version 0.9.2 is
<ahref="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><spanclass="date">9.6.2009:</span> The
<ahref="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
<ahref="download.html">released</a>. This release fixes various
file handling bugs and adds small UI enhancements.</p>
<p><spanclass="date">24.5.2009:</span> First version 0.9.0
