Here’s an old fan I modelled yesterday. It was made with SketchUp 2019 and some extensions like VertexTools, QuadFace Tools and SUbD.
A quick render made using V-Ray with no materials.
Lines and profiles overlayed on the rendered pic.
Some views of the model (0 subdivisions)
Some views of the model (2 subdivisions)
Some views of the model (just profiles)
EDIT:
… aaaaand here’s the 3D Warehouse link to download it!