source.zip contains wind_generator.psd - Photoshop source texture with diffuse, specular, normal map and ambient occlusion layers. You can easily change colors of base elements. See texture preview images.
Real world scale.
Model dimensions: x: 76,26 m y: 22,13 m z: 113,62 m
mast height - 74 m the length of one blade - 45 m
Opens and renders without errors. Quads and tris only. No overlapping faces. No overlapping vertices. No isolated vertices. Model centered at origin. Clean UVs.