The wind turbine was modeled in Maya. The turning blades and the flag/rope, at the rear of the turbine, are both animated in the Maya files, from frames 1-300. I used a sine wave deformer to animate the flag. I also fine tuned some of the flag rope animation by animating the vertices, so if you change the flag movement animation you might need to deleted the vertex keys on the rope and animate it a different way. The environmental sun light is also animated in the Maya files.
The WRL, OBJ and DXF files were exported from Maya. I am not sure how those will translate to other 3D programs.