On Mon, 3 Dec 2018 at 11:18, Brent Brown <brent@eds.co.nz> wrote:

> Hello Russell,
>
> A little info on this particular wind turbine here, no deep hole - unless
> you buy one
> ;-)
>
> https://www.1-day.co.nz/products/ecopower-outdoor-wind-turbine-3
>
> Speed regulation: Automatically adjust windward direction
> Control system: Electromagnet
>
> Not externally obvious how it acheives adjusting of the windward
> direction, but
> probably one of the ways you mention. I notice pushing directly backwards
> on the
> shaft it seems to push against a spring, or could be magnetic force.
>


This appears to be identical


https://www.amazon.ca/Popsport-Wind-Generator-12V-Powerful/dp/B073LKZ555

WT head on base here.


https://images-na.ssl-images-amazon.com/images/I/61DOq4Ns77L._SL1500_.jpg

The vertical support shaft is probably offcentred in the head such that the
vertical axis of the support is downwind of the vertical axis of the
support rod entering the turbine head proper. Pressing very slightly off
centre against the upwind end of the head will slew it on this offset pivot
and an internal spring resists this.

Probably :-)


        Russell
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