<a href="https://en.wikipedia.org/wiki/Precession" class="extiw" title="w:Precession">Precession</a> on a <a href="https://en.wikipedia.org/wiki/gyroscope" class="extiw" title="w:gyroscope">gyroscope</a>. Note that the <a href="https://en.wikipedia.org/wiki/angular_momentum" class="extiw" title="w:angular momentum">angular momentum</a> vector is pointing starting at the top point towards the fixed point (also applies to the <a href="https://en.wikipedia.org/wiki/gimbal" class="extiw" title="w:gimbal">gimbal</a>). The figure is not completely correct.
<a href="//commons.wikimedia.org/wiki/User:LucasVB" title="User:LucasVB">LucasVB</a>
<div class="thumb tleft"><div class="thumbinner" style="width:222px;"><a href="//commons.wikimedia.org/wiki/File:Gyroscope_precession.gif" class="image"><img alt="Gyroscope precession.gif" src="https://upload.wikimedia.org/wikipedia/commons/thumb/8/82/Gyroscope_precession.gif/220px-Gyroscope_precession.gif" decoding="async" width="220" height="220" class="thumbimage" srcset="https://upload.wikimedia.org/wikipedia/commons/8/82/Gyroscope_precession.gif 1.5x" data-file-width="300" data-file-height="300"></a>  <div class="thumbcaption"><div class="magnify"><a href="//commons.wikimedia.org/wiki/File:Gyroscope_precession.gif" class="internal" title="Enlarge"></a></div></div></div></div>