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47 <h1>OpenRocket — an Open Source model rocket simulator</h1>
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53 <strong>Download now!</strong>
54 <span>OpenRocket-12.09.jar</span>
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57 <a href="https://sourceforge.net/projects/openrocket/files/openrocket/12.09/ReleaseNotes/view">Release notes</a> |
58 <a href="download.html">Other versions</a>
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71 <p><strong>OpenRocket</strong> is a free, fully featured model
72 rocket simulator that allows you to design and simulate your
73 rockets before actually building and flying them.</p>
74 <p>The main features include:</p>
76 <li>Six-degree-of-freedom flight simulation</li>
77 <li>Automatic design optimization</li>
78 <li>Realtime simulated altitude, velocity and acceleration display</li>
79 <li>Staging and clustering support</li>
80 <li>Cross-platform (Java-based)</li>
82 <p>Read more about its <a
83 href="features.html">features and see screenshots</a>.
85 <p>OpenRocket is an Open Source project licensed under the
86 <a href="license.html">GNU GPL</a>. This means that the
87 software is free to use for whatever purposes, and the source
88 code is also available for studying and extending.
90 <p>OpenRocket needs help to become even better. Implementing
91 features, writing documentation and creating example designs are
92 just a few ways of helping. If you are interested in helping
93 make OpenRocket the best rocket simulator out there, please
94 <a href="getinvolved.html"><em>Get involved!</em></a>
96 <div class="clear"></div>
99 <p><span class="date">16.9.2012:</span> Version 12.09 is
100 <a href="download.html">released</a>!</p>
101 <p>This version contains a huge number of new features by many contributors:</p>
103 <li>3D rocket design view</li>
104 <li>Component Presets</li>
105 <li>Custom expressions in simulations</li>
106 <li>Printing for centering ring and clustered centering ring components</li>
107 <li>Support simple arthmatic in dimension entry</li>
108 <li>Support deploying recovery device at stage separation</li>
109 <li>Support for fractional inches (1/64) for unit length</li>
110 <li>Added preference for windspeed units separately</li>
111 <li>Added "most recently used files" in File Menu</li>
112 <li>Improved printed accurracy in fin marking guide</li>
113 <li>Calibration rulers added to printed templates</li>
114 <li>Translations in Czech and Polish, numerous updates</li>
116 <p><span class="date">10.3.2012:</span> Version 12.03 for desktop
117 and Android is <a href="download.html">released</a>!</p>
118 <p>In this release the version numbering scheme has been changed.
119 From now on the version number is <em>YY.MM</em> indicating the
120 year and month of the release. Bug fix releases are indicated by
121 an added "<em>.1</em>".</p>
122 <p>This also marks the first release for Android devices. In this
123 first release you can open files and examine existing simulations,
124 stability data and motor files. The Android port is thanks to
125 work by Kevin Ruland.</p>
126 <p>Enhancements in the desktop version include saving designs in RKT
127 format thanks to Doug Pedrick, freeform fin set import form images
128 by Jason Blood, configurable stage separation
129 events, guided help tours and displaying the computed motor
130 designation class. The application has also been translated to
131 Italian by Mauro Biasutti and Russian by the Sky Dart Team.</p>
132 <p><span class="date">24.11.2011:</span> Version 1.1.9 is
133 <a href="download.html">released</a>!</p>
134 <p>For this version Richard Graham has implemented geodetic
135 computation methods, which take into account the curvature of the
136 Earth and the coriolis effect. The computation method is selected
137 by the <em>Geodetic calculations</em> option in the simulation
138 options. It's not <em>(yet)</em> a full spherical computation model, but
139 should be accurate enough for almost all sub-orbital needs.</p>
140 <p>Doug Pedrick has also enhanced the printing system with the
141 ability to print fin positioning guides, transition templates and
142 nose cone profiles. Other smaller enhancements and bug fixes are
144 <p><span class="date">25.8.2011:</span> Version 1.1.8 is
145 <a href="download.html">released</a>!</p>
146 <p>This release contains bug fixes to the optimization methods.
147 It also contains a workaround to a JRE bug that prevents running
148 OpenRocket on some builds of Java 7.</p>
149 <p>The web pages have also been somewhat updated and Boris du Reau has
150 created <a href="http://openrocket.trans.free.fr/">a separate site</a>
151 for coordinating the localization efforts for OpenRocket.</p>
152 <p><span class="date">12.8.2011:</span> Version 1.1.7 is
153 <a href="download.html">released</a>!</p>
154 <p>This release includes automatic rocket design optimization
155 support (<em>Analyze</em> → <em>Rocket optimization</em>).
156 You can optimize any amount of rocket parameters for apogee
157 altitude, maximum velocity or a number of different values.</p>
158 <p>While the automatic optimization is a powerful tool, it is very
159 easy to optimize against particulars of the simulation methods,
160 instead of true physical phenomena. Always keep common sense at
161 hand and take the results with a grain of salt.</p>
162 <p><span class="date">22.7.2011:</span> Version 1.1.6 is
163 <a href="download.html">released</a>!</p>
164 <p>This release includes initial localization support and
165 translations to French, German and Spanish. This is thanks to the
166 great work of Boris du Reau, and the teams from Tripoli France,
167 Tripoli Spain and ERIG e.V. If you prefer to use some other
168 language than the system default, you can select the language on
169 the "Options" tab of the preferences dialog.</p>
170 <p>The release also includes design scaling support and numerous bug
172 <p><span class="date">10.6.2011:</span> Version 1.1.5 is
173 <a href="download.html">released</a>!</p>
174 <p>This release includes updates to the printing system which fixes
175 printing on Windows.</p>
176 <p><span class="date">5.3.2011:</span> Version 1.1.4 is
177 <a href="download.html">released</a>!</p>
178 <p>This release includes initial printing support, thanks to Doug
179 Pedrick. Printing still has a few issues on some platforms.
180 Various bugs have also been fixed.</p>
181 <p><span class="date">6.10.2010:</span> Version 1.1.3 is
182 <a href="download.html">released</a>!</p>
183 <p>This release includes support for moving and copying components
184 in the component tree using drag-and-drop. Use normal DnD for
185 moving, and control-drag for copy. This release also fixes a
186 severe bug in the undo system.</p>
187 <p><span class="date">7.9.2010:</span> A bug-fix version 1.1.2 is
188 <a href="download.html">released</a>!</p>
189 <p>This release fixes a severe bug in 1.1.1 that prevented adding stages
190 to rocket designs. Users are recommended to upgrade.</p>
191 <p><span class="date">3.9.2010:</span> Version 1.1.1 is
192 <a href="download.html">released</a>!</p>
193 <p>For this release a major part of the simulator code has been
194 rewritten for better flexibility in future development. It also
195 includes a vastly improved thrust curve selection dialog, the
196 possibility to loading user-defined thrust curves and better
197 startup times than previous releases.</p>
198 <p>Simulation listeners written for older versions of OpenRocket
199 are not compatible with this release.</p>
200 <p><span class="date">21.3.2010:</span> Version 1.1.0 is
201 <a href="download.html">released</a>!</p>
202 <p>This release includes the first support for loading RockSim
203 rocket design files (.RKT), thanks to contributions by Doug
204 Pedrick. It's also the kick-off of the 1.1 development branch of
206 <p><span class="date">10.3.2010:</span> Version 1.0.0 is
207 <a href="download.html">released</a>!</p>
208 <p>This release includes several hundred new thrustcurves from
209 <a href="http://www.thrustcurve.org/">thrustcurve.org</a> and some
210 bug fixes. It is also a stable milestone, after which development
211 on larger features will be started in a 1.1 branch. Look out
213 <p><span class="date">17.2.2010:</span> Version 0.9.6 is
214 <a href="download.html">released</a>!</p>
215 <p>This release updates the aerodynamic calculation methods to be
216 more in line with the Barrowman method and enhances the simulation
217 time step selection, in addition to fixing numerous bugs.</p>
218 <p><span class="date">28.11.2009:</span> Version 0.9.5 is
219 <a href="download.html">released</a>!</p>
220 <p>This release <strong>fixes a serious bug in 0.9.4</strong> that
221 prevented adding a tube coupler and centering ring to the same
222 body tube, in addition to a few smaller additions. Users of
223 0.9.4 should upgrade immediately!</p>
224 <p><span class="date">24.11.2009:</span> Version 0.9.4 is
225 <a href="download.html">released</a>!</p>
226 <p>This version adds support for through-the-wall fin tabs,
227 attaching components to coupler tubes, material editing, automatic
228 update checking, in addition to fixing numerous bugs.</p>
229 <p><span class="date">1.9.2009:</span> Version 0.9.3 is
230 <a href="download.html">released</a>!</p>
231 <p>This version includes lots of bug fixes and new features including
232 data exporting, showing flight events in plots, example rocket designs,
233 splitting clustered inner tubes and automated bug reporting.</p>
234 <p><span class="date">13.7.2009:</span> Version 0.9.2 is
235 <a href="download.html">released</a>!</p>
236 <p>This version includes <strong>bug fixes for imperial unit
237 conversions</strong> and UI improvements for motor selection.
238 <em>All users of imperial units should upgrade!</em></p>
239 <p><span class="date">9.6.2009:</span> The
240 <a href="documentation.html">Master's thesis</a> for which OpenRocket
241 was written for is now available!</p>
242 <p>At the same time version 0.9.1 was
243 <a href="download.html">released</a>. This release fixes various
244 file handling bugs and adds small UI enhancements.</p>
245 <p><span class="date">24.5.2009:</span> First version 0.9.0
246 <a href="download.html">released</a>!</p>
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