Hello Flux,
Gary is right, same project I have been working on for over a year. It will be only used for charging a 24 volt battery bank.
I think You have answered my question in a round about way.
the gap will stay at 7/8, voltage will stay the same as the thiner coil.(Don't need any more volt's per RPM)
When mocking this up it looked like I could get an extra wire in hand for the givin air gap, the thicker coil does fit, clearances will be tighter.
The rotors will be at ground level and cooling of the coils is my main concern.
I was under the assumption that less coil resistance in the stator = less heat in the coils, But did not know if it had any other side effects.
-Zapmk