Re: wind power and reality
[RE-wrenches]
Please, someone explain
to me why they would expect a windmill with less than a 5 foot
diameter blade to be anything more than a trickle charger or battery
maintainer?
In a good wind it can do much more - assuming it does not fall
apart.
Does anyone make a good
wind unit with a blade over six feet diameter
the African Windpower awp36 is 12 foot diameter
http://www.power.co.zw/windpower/
that is tried and
true
tested here on Scoraig to 100mph: no problems.
and costs less than
$3000
retail is $1700. Ask "Robert W. Preus"
<rwpreus@yahoo.com> for a full quotation in the USA.
that has a past
record over 5 years in usewith no major problems.
hmm. The prototype was erected in 1996 and that had no
problems over two years but they took it down to make a copy of the
blades. The production version has been in widespread use since
about 1998. We had some problems with cracks in the blades but
they have been upgraded. there are minor quality control
problems such as poorly fitting bearings but no intrinsic
problems.
Also will it start
at less than 10 mph,
While it will not always start at below 10mph, our experience has
been that it if the windspeed exceeds 7mph consistently then there
will be a gust sufficient to start it. The machine is designed
for low wind sites, around 8-9mph annual average.
and noise will not
upset chickens etc.
I find it hard to hear the sound it makes. It easily gets
drowned out by birdsong, or wind in the guy cables.
I agree with you. What we need is more big, cheap, simple,
reliable wind turbines. Output power rating is not particularly
important compared to rotor diameter and blade tip speed.
--
Hugh
http://www.ScoraigWind.co.uk
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