This is a fully functioning model of a 2-stroke, 3-cylinder, air cooled petrol engine. It has 3 pistons, a crank shaft, spark-plugs, air and fuel intake (blue) and exhausts (red) The crank shaft is as balanced as I could get it without calling on the help of a maths genius, and the fuel and air intake does have access to the sump to alow for lubrication of the crank. Is you are thinking of incoperation this into a model, please be aware there is no gear box, carburetor or exhaust manifold.
STL (Stereolithography, filesize: 301 KB), OBJ (OBJ, filesize: 212 KB), 3DS (3D Studio, filesize: 193 KB), FBX (Autodesk FBX, filesize: 305 KB), IGE (IGES, filesize: 298 Bytes), MAX (Autodesk 3ds Max, filesize: 335 KB), SKP (Sketchup, filesize: 1.61 MB), OTHER (Other, filesize: 181 KB)