This cut away training demonstration model is a detailed simulation of a Four Stroke Combustion engine.
The handle can be turned to clearly show how the components operate. A light is activated to replicate the spark plug. See the link below to the short Youtube video.
An interesting engineering decorative item.
A four-stroke engine (also known as four cycle) is an internal combustion (IC) engine in which the piston completes four separate strokes while turning a crankshaft. A stroke refers to the full travel of the piston along the cylinder, in either direction. The four separate strokes are termed:
A vintage item made in Croydon, United Kingdom by Irwin.
Size 32cm wide. 45cm High. 19cm Deep.