Andrew Feliks and his first with the timing piston engine. Constructed on a master thesis at the Cathedral of Spark Ignition Engines at the Cracow University of Technology 1978 year
<a href="//commons.wikimedia.org/wiki/User:Andrew_Feliks" title="User:Andrew Feliks">Andrew Feliks</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>