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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-1.1.9.jar</span>
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57 <a href="https://sourceforge.net/projects/openrocket/files/openrocket/1.1.9/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>
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99 <p><span class="date">24.11.2011:</span> Version 1.1.9 is
100 <a href="download.html">released</a>!</p>
101 <p>For this version Richard Graham has implemented geodetic
102 computation methods, which take into account the curvature of the
103 Earth and the coriolis effect. The computation method is selected
104 by the <em>Geodetic calculations</em> option in the simulation
105 options. It's not <em>(yet)</em> a full spherical computation model, but
106 should be accurate enough for almost all sub-orbital needs.</p>
107 <p>Doug Pedrick has also enhanced the printing system with the
108 ability to print fin positioning guides, transition templates and
109 nose cone profiles. Other smaller enhancements and bug fixes are
111 <p><span class="date">25.8.2011:</span> Version 1.1.8 is
112 <a href="download.html">released</a>!</p>
113 <p>This release contains bug fixes to the optimization methods.
114 It also contains a workaround to a JRE bug that prevents running
115 OpenRocket on some builds of Java 7.</p>
116 <p>The web pages have also been somewhat updated and Boris du Reau has
117 created <a href="http://openrocket.trans.free.fr/">a separate site</a>
118 for coordinating the localization efforts for OpenRocket.</p>
119 <p><span class="date">12.8.2011:</span> Version 1.1.7 is
120 <a href="download.html">released</a>!</p>
121 <p>This release includes automatic rocket design optimization
122 support (<em>Analyze</em> → <em>Rocket optimization</em>).
123 You can optimize any amount of rocket parameters for apogee
124 altitude, maximum velocity or a number of different values.</p>
125 <p>While the automatic optimization is a powerful tool, it is very
126 easy to optimize against particulars of the simulation methods,
127 instead of true physical phenomena. Always keep common sense at
128 hand and take the results with a grain of salt.</p>
129 <p><span class="date">22.7.2011:</span> Version 1.1.6 is
130 <a href="download.html">released</a>!</p>
131 <p>This release includes initial localization support and
132 translations to French, German and Spanish. This is thanks to the
133 great work of Boris du Reau, and the teams from Tripoli France,
134 Tripoli Spain and ERIG e.V. If you prefer to use some other
135 language than the system default, you can select the language on
136 the "Options" tab of the preferences dialog.</p>
137 <p>The release also includes design scaling support and numerous bug
139 <p><span class="date">10.6.2011:</span> Version 1.1.5 is
140 <a href="download.html">released</a>!</p>
141 <p>This release includes updates to the printing system which fixes
142 printing on Windows.</p>
143 <p><span class="date">5.3.2011:</span> Version 1.1.4 is
144 <a href="download.html">released</a>!</p>
145 <p>This release includes initial printing support, thanks to Doug
146 Pedrick. Printing still has a few issues on some platforms.
147 Various bugs have also been fixed.</p>
148 <p><span class="date">6.10.2010:</span> Version 1.1.3 is
149 <a href="download.html">released</a>!</p>
150 <p>This release includes support for moving and copying components
151 in the component tree using drag-and-drop. Use normal DnD for
152 moving, and control-drag for copy. This release also fixes a
153 severe bug in the undo system.</p>
154 <p><span class="date">7.9.2010:</span> A bug-fix version 1.1.2 is
155 <a href="download.html">released</a>!</p>
156 <p>This release fixes a severe bug in 1.1.1 that prevented adding stages
157 to rocket designs. Users are recommended to upgrade.</p>
158 <p><span class="date">3.9.2010:</span> Version 1.1.1 is
159 <a href="download.html">released</a>!</p>
160 <p>For this release a major part of the simulator code has been
161 rewritten for better flexibility in future development. It also
162 includes a vastly improved thrust curve selection dialog, the
163 possibility to loading user-defined thrust curves and better
164 startup times than previous releases.</p>
165 <p>Simulation listeners written for older versions of OpenRocket
166 are not compatible with this release.</p>
167 <p><span class="date">21.3.2010:</span> Version 1.1.0 is
168 <a href="download.html">released</a>!</p>
169 <p>This release includes the first support for loading RockSim
170 rocket design files (.RKT), thanks to contributions by Doug
171 Pedrick. It's also the kick-off of the 1.1 development branch of
173 <p><span class="date">10.3.2010:</span> Version 1.0.0 is
174 <a href="download.html">released</a>!</p>
175 <p>This release includes several hundred new thrustcurves from
176 <a href="http://www.thrustcurve.org/">thrustcurve.org</a> and some
177 bug fixes. It is also a stable milestone, after which development
178 on larger features will be started in a 1.1 branch. Look out
180 <p><span class="date">17.2.2010:</span> Version 0.9.6 is
181 <a href="download.html">released</a>!</p>
182 <p>This release updates the aerodynamic calculation methods to be
183 more in line with the Barrowman method and enhances the simulation
184 time step selection, in addition to fixing numerous bugs.</p>
185 <p><span class="date">28.11.2009:</span> Version 0.9.5 is
186 <a href="download.html">released</a>!</p>
187 <p>This release <strong>fixes a serious bug in 0.9.4</strong> that
188 prevented adding a tube coupler and centering ring to the same
189 body tube, in addition to a few smaller additions. Users of
190 0.9.4 should upgrade immediately!</p>
191 <p><span class="date">24.11.2009:</span> Version 0.9.4 is
192 <a href="download.html">released</a>!</p>
193 <p>This version adds support for through-the-wall fin tabs,
194 attaching components to coupler tubes, material editing, automatic
195 update checking, in addition to fixing numerous bugs.</p>
196 <p><span class="date">1.9.2009:</span> Version 0.9.3 is
197 <a href="download.html">released</a>!</p>
198 <p>This version includes lots of bug fixes and new features including
199 data exporting, showing flight events in plots, example rocket designs,
200 splitting clustered inner tubes and automated bug reporting.</p>
201 <p><span class="date">13.7.2009:</span> Version 0.9.2 is
202 <a href="download.html">released</a>!</p>
203 <p>This version includes <strong>bug fixes for imperial unit
204 conversions</strong> and UI improvements for motor selection.
205 <em>All users of imperial units should upgrade!</em></p>
206 <p><span class="date">9.6.2009:</span> The
207 <a href="documentation.html">Master's thesis</a> for which OpenRocket
208 was written for is now available!</p>
209 <p>At the same time version 0.9.1 was
210 <a href="download.html">released</a>. This release fixes various
211 file handling bugs and adds small UI enhancements.</p>
212 <p><span class="date">24.5.2009:</span> First version 0.9.0
213 <a href="download.html">released</a>!</p>
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