Quadrocopter Schema
<a href="//commons.wikimedia.org/wiki/User:Tiger66" title="User:Tiger66">Tiger66</a> idée originale de <a href="//commons.wikimedia.org/wiki/User:Bernd_vdB" title="User:Bernd vdB">Bernd vdB</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span> sur la base du travail de <a href="//commons.wikimedia.org/wiki/User:Bernd_vdB" title="User:Bernd vdB">Bernd vdB</a>