The animation shows the cam cycle and timing of a 5-cylinder radial engine
<a href="//commons.wikimedia.org/w/index.php?title=User:Stoianovici&amp;action=edit&amp;redlink=1" class="new" title="User:Stoianovici (page does not exist)">Stoianovici</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>