actual monthly / annual output averages versus rotor diameter

[Fused]

Thanks to Hugh and SparWeb for the explanations.

It bothered me a bit so I looked into it myself.
I found the 8 footer runs a 2" larger diameter disk than the 6 footer
and that the 6 footer runs 1 magnet disk and 1 steel plate.

 I built the 6 footer and had it at first assembled with 1 steel rotor and 1 magnet
 disk, then I added magnets to the steel plate to have 2 magnet rotors. Output
went way up. Stator was wound with 20 ga.

I think I'm just trying to figure out how to justify building the 8 footer to my wife. 

Thanks guys.

Fused

[bvan1941]

Dan B,
Thanks for the 20' turbine update. 200-600kwh/mo. is substantial !
Have you felt the furling of the 2 largest turbines have been reliable over the past 2years?
Would you contemplate building anything larger based on this design?
Bill

[DanB]

Dan B,
Thanks for the 20' turbine update. 200-600kwh/mo. is substantial !
Have you felt the furling of the 2 largest turbines have been reliable over the past 2years?
Would you contemplate building anything larger based on this design?
Bill

Hi Bill - larger, no - especially for a battery charging system.  Honestly I do not know (and have my doubt actually) that my 20' machine would hold up on a really good wind site with high/steady winds.  So at this time, I have no plans to build larger...

The furling does seem to work well though, on the two that we have built.  They are pretty well limited to 3kW sustained output - I see occasional / brief peaks upwards of 3x that much.