Model
I decided to create a very plain pocket fan -- as opposed to the curved version above -- just to get it into the Phase 2 prototype game level as quickly as possible. The model below should have taken only a few minutes to create, but I was held up triangulating the blades to ensure that they looked right.
Final stage was to UV map the surface and create a matching colour map for the model.
Nothing special but it does the job. The blades & rotor head are a separate object so they can be rotated by the game engine. Rather than exporting a manually-animated model I'm going to control the rotor animation from within the engine, to allow the speed to vary.
For such a simple shape it's a relatively high poly count (around 300 triangles) but I was more interested in getting it made quickly than keeping the count low.