Airplane crank engine cutaway - photo

[greyhoundollie]

Is this a flat 8 opposed engine? Or is it a flat 4 non-opposed engine? Or is this an 8 cylinder engine block combined into a 4 cylinder engine with a 4 piston air pump? A different angle on the picture taking would have helped a bit.


This wiki shows all types of aircraft engine starters and start methods. This engine doesn't seem to be covered.
https://en.wikipedia.org/wiki/Aircraft_engine_starting