1/20 scale dummy engine of Viale 5-cylinder aero engine.
Components included in Shapeways file are:
crankcase, cylinders, rocker arms, valve covers
Not included are pushrods, springs and other parts that can be simulated by wire or carbon rod.
Parts are very finely detailed and need thorough cleaning for good result. Uncured resin remains between the cylinder fins and needs to be brushed-sanded away...