Rotary engine Gnome Monosoupape — professional 3D model by arti4077 (CGTrader). Price: $42. Technical data: 500000 polygons, 600000 verts. Textured.
BLEND (Blender, filesize: 2.25 MB), OBJ (OBJ, filesize: 62.9 MB), FBX (Autodesk FBX, filesize: 18.9 MB), STL (Stereolithography, filesize: 58.9 MB)