This was very similar to the first model except the blades were constructed more accurately.
The aerofoil is a NACA0018 symmetrical section with the chord line curved to match the radius using the aerofoil plotter page.
Blade thickness (%)
Blade area / frontal area
This will start more easily than the first model and runs more smoothly. It has similar characteristic of rotating at around wind speed and then accelerating beyond this when the wind picks up.