"Larry" wrote in message
...
"KLC Lewis" wrote in
:

I'm working up plans for a VAWT (vertical axis wind turbine) for
mounting on Essie which should give (assuming all goes well) about 10
amps of charging current into the batteries turning at 120 rpm. Should
be very very quiet (virtually silent, actually). The only part of it
that is really unique to my own design is the wind turbine itself,
which is as streamlined as I can make it to reduce drag loss, while
maintaining optimum wind cupping. Don't know if or when it will be
finished, but I'll post progress here if and when it occurs.



The incredibly efficient and simple design of the permanent magnet,
multiphase alternators used by the mountain men on otherpower.com is well
suited to your purpose. A vertical axis turbine directly pulling the
magnets across those sealed coils just above the deck would work
fantastic, if you can keep the turbine from broaching over.

Yah, axial flux alternators are the only way to go. I'll use a 3 phase axial
flux, currently weighing the benefits of using Halbach Array magnets
(imitation monopoles) although they tend to be rather expensive. This, of
course, is offset by making iron backing plates redundant, so you eliminate
the expense and weight of them.