The De Havilland DHC-2 Beaver, deigned for X Plane 11 by Thranda Design has a great working representation of the engine included. It is a Pratt & Whitney R-985 Wasp Junior radial engine (nine cylinder radial motor) that pushes out 450hp.
@LJ Re I guess this is sort of a video for us radial engine geeks, but essentially it’s showing the throttle/fuel delivery on the left, and on the right it’s showing a front cross sectional view of the radial engine being controlled. Those are all cylinders/combustion chambers.