The compressor of a sectioned Atar turbojet engine. Flow was from bottom left corner towards the background of the photo.
Stator blades (guide vanes) have been removed in the cut-out section, so that the rotor blades can be better observed.
<a href="//commons.wikimedia.org/wiki/User:Ariadacapo" title="User:Ariadacapo">Olivier Cleynen</a>
<span class="int-own-work" lang="en">Own work</span>