To: rsgb_lf_group@blacksheep.org
Date: Thu, 22 Sep 2011 20:21:48 -0400
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From: riese-k3djc@juno.com
Subject: Re: LF: Re: Turbine magnets
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several have been installed locally and one of the electric folk gave a
talk
at the local radio club,, the speed of the blade tips will run close to
200 Mph
thus the issue of birds flying into them. the power in this installation
is AC
but what I found interesting is the frequency can be matched to the line
as the generators spin fast or slow. The housings on top of those towers
are the size
of an RV and bigger and the 3 installed produce 1 Mw each under good wind
takes a good worker 15 minutes to climb them. 

he said one of the wildlife issues is to look under the installations to
find 
dead birds and the power company will plant a few to make sure the agency
is finding them
for an accurate count

Bob K3DJC

On Thu, 22 Sep 2011 16:23:26 -0400 Warren Ziegler <wd2xgj@gmail.com>
writes:
> If these were DC machines and interconnected by high current DC 
> lines
> one could imagine a substantial magnetic field, but I believe that
> these machines produce AC either directly or through an inverter.
> 
> 
> -- 
> 73 Warren K2ORS
>                 WD2XGJ
>                 WD2XSH/23
>                 WE2XEB/2
>                 WE2XGR/1
> 
> 
> 
> 
> On Thu, Sep 22, 2011 at 4:15 PM, Andy Talbot <andy.g4jnt@gmail.com> 
> wrote:
> > Surely if the magnetic field leaked that much, the generators 
> would suffer
> > efficiency.
> > They are designed as closed magnetic circuits, with all the field 
> lines
> > closely confined in iron, with small air gaps
> >
> > Andy
> > 'jnt
> >
> >
> > On 22 September 2011 21:07, Hugh M0WYE <m0wye@radiouk.com> wrote:
> >>
> >> Seems unlikely that the magnetism would reach that far to me - 
> the
> >> magnetic field would be no different to any other large 
> generating set -
> >> they are just an ordinary alternator driven through a gearbox.
> >> If they did affect magnetic compasses you would have thought that 
> the
> >> place you would really notice it would be around the coast, with 
> small boats
> >> sailing in amongst them.
> >> Although they look as if they are turning slowly, they can't do 
> many rpm
> >> before the tips of the blades go supersonic, as the blades are 
> many 10s of
> >> metres long.
> >> Over what distance did you notice the magnetic effect? perhaps I 
> could get
> >> down to the ones on Romney Marsh, here in Kent and see if they 
> have any
> >> effect on a compass needle.
> >>
> >> The moving blades can affect radio reception for people living 
> nearby,
> >> although I've not noticed this myself.
> >>
> >> 73
> >> Hugh M0WYE
> >>
> >> ----- Original Message -----
> >> From: mal hamilton
> >> To: rsgb
> >> Sent: Thursday, September 22, 2011 5:09 PM
> >> Subject: LF: Turbine magnets
> >> Great for LF!!!!!!!!!!!!!
> >>
> >> Experience
> >>
> >> Driving to Gleneagles in Scotland last weekend my car magnetic 
> compass was
> >> reading backwards and erratic and I wondered why.
> >> The hills es mountain tops are covered with WIND TURBINES,  hugh 
> beasts
> >> and only turning slowly, cannot be producing much electric.
> >> however thinking about it I have concluded that the 
> strong MAGNETS in the
> >> turbines must effect a magnetic compass,  possible aeroplanes as 
> well except
> >> they are flying very high, might also have an influence on 
> GPS frequencies
> >> and navigation in these areas
> >> I must say these hugh Monsters strewn all across the Scottish 
> mountain
> >> tops and countryside spoils the scenery.
> >>  de Mal/G3KEV
> >>
> >
> 
> 
> 
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