Well I just realised that they are not grade N35 but N42 (US version)… does this affect my turns per coil or wiring size?
N42 magnets will have about 10% higher flux than N35. This means that the machine will reach cut-in voltage about 10% slower than with the N35. This is OK and will mean very good performance in 7 mph winds, but as the wind increases the blades will be going too slow and it will stall. There are various ways to counteract this. You can use 10% fewer turns in each coil. I doubt if this will allow you to use a larger wire size as the changes in size are nearer to 25%. Or you can have a larger space between the magnets and the stator. Again you could make the stator fatter but there will probably not be a suitable wire size. Or you could even make the blades 10% longer by increasing all the dimensions 10%. This would give you 20% more power in any given windspeed below the maximum but would not increase the maximum output of the machine.
