Just a diary entry, thinking out load as it were...
Had some bits lying around and threw them all together.

Parts
Bike wheel hub
- " diameter Chromed steel light fitting cover - quite thick
- 12" tall aluminum veins.
- Neo 3/4"x1/4" magnets
I'm thinking I could bolt the stationary stator onto the hub flange and mount inside a piece of scaffold pole, the benefit being - I could mount this way above my roof line to get clean air.
Being a vertical axis - I'm thinking it won't spin too fast, and maybe get away without resining the magnets in.

My knowledge of numbers of poles and stator winding thickness and number of turns is limited, therefore a lot more reading to do. The photo shows 10 magnets, but I am not sure what the final number will be?
I am hoping to achieve a low power trickle charger @ 12v, maybe 1 Amp if I am lucky??
Just sharing what I am doing/experimenting with at the moment - thoughts and help welcomed.
Ben