Flux
I built one of the turbines per hugh piggotts 2003 plans, which was ten coils, 21 awg 320 turns one in hand. At 60 rpm it puts out 17-18 volts rectified but unloaded. I have seen it while furling and hooked to the 48 volt battery in a massive wind putting out 1000 wattsfor maby 5 min per sears clamp meter checking the amps and x,ing the voltage. The 100 volts was on a test stand that cleared the ground by about 6 inches. While the other turbine was down it had one high amp at 16 amps per doc watson.
The other turbine is the same but wound with 340 turns. This was before I knew more was not better, blush. It has two washers added for gap.
Hughs new recomindation for these turbines is 290 turns of 21awg or 2 in hand of 24awg.
I just add this incase something was missing. I was hoping the non production of power was due to stalling, which is why I have some 12 awg wire between them and the battery and why I made the bigger blade. If they are weak I don't know what I could have did wrong. If they are weak am I correct in believing shorter blades and heavier wire would get the most out of them.
I can't judge wind very well so it might be blowing harder then I think or wishfull thinking but it seems the turbine with the 320 turns is doing a bit better with the nine foot blades.
Don't get me wrong. When I did the open voltage testing on the test stand the blades were moving and scary. The 340 turn turbine only got to 80 volts. Also you can tell they are moving when they finely start feeding the battery. I do think they produced a bit better when the battery got higher but that may be my imagination. I used standard boards for the blades and the 320 turn one had 5 and 1/2 inch cord and the 340 turn one had a cord of 7 and 1/2. Hugh calls for 6 inch cord. I always atributed the 100 volt compared to 80 volts to blade speed.
Please comment one more time even if it is the same result as above cause I know you know your stuff.
Thank you
gww