Wind turbines - can be DIY made?

I noticed a wind turbine in B&Q, and it is nothing more than a motor, on a pole with a propellor and some box of electronics.
How are these valued at over £1500 when it seems it can be made for a fraction of that? How much would the parts be?
dg
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The value is what people are prepared to pay. It has no connection with the cost of the parts.
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Frank Erskine

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wrote:

It's also the cost of R&D. Try making your own - go on!
Mary

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Mary Fisher wrote:

What R&D?
The motor seems to be some off the shelf model and the propeller, well same as those on some 1850 farm bore hole.
The only thing to be 'developed' may well be the electronic box, but that I presume would be a basic convertor circuit, again nothing new.
dg
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Mary Fisher wrote:

What R&D?
The motor seems to be some off the shelf model and the propeller, well same as those on some 1850 farm bore hole.
The only thing to be 'developed' may well be the electronic box, but that I presume would be a basic convertor circuit, again nothing new.
dg
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Mary Fisher wrote:

http://www.britishwindenergy.co.uk/you/byo.html R&D already done.
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dennis@home wrote:

There's a link on there to Hugh Piggott's site at
http://www.scoraigwind.com/index.htm
which is quite interesting (although not a model for good Web page design). About half-way down the page there's a section headed "rooftop wind turbines are a load of nonsense" - interesting that, coming, as it does, from an obvious home-brew wind power enthusiast.
--
Andy

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wrote:

Well you aren't going to get a decent flow of wind unless you put it on a pole at least 2-3m above the roof. You probably want 5+m. People object to TV aerials on poles I suspect that they will treat wind turbines the same way.
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On Wed, 4 Oct 2006 20:05:51 +0100, Mary Fisher wrote:

Plenty of R&D has already been done on DIY wind turbines, and plenty of plans on the net. Trouble is the effort probably isn't worth it for the small outputs that you are going to get from an turbine you can construct at home without specialist kit.
As I see it wind is not really the way to go. To get sensible outputs you have to have huge devices(*) that on average only generate 1/3 to 1/4 of their rated output over a year.
In the relative scheme of things as well not just the rotating jumbo jet on a pole 2MW commercial turbines. Even a small 2kW "domestic" jobbie has a rotor around 2.5m in diameter on top of pole at least 5m high. And note that those powers are peak powers not what you'll actualy get most of the time.
Small turbines with rotors less than 1m in dia generate no more than a few hundred watts OK for battery charging on a boat when the boat isn't in use but for a house not worth it. To put this in perspective, a 500W or so wind turbine couldn't keep a large battery bank charged in the long term to power 3 Cisco wireless bridges, a router and switch. And this was on top of a hill with good exposure to strong winds...
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What did you do instead?
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Andy Hall wrote:

Went bust I should think, or dug some cable...
Definitely micro windpower is a waste of time and fossil fuels.
You would be better off making a small steam engine and burning your rubbish.
Hmm...that IS a thought actually..and an electric fan once it gets going to 'turbocharge' the boiler..
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On Wed, 04 Oct 2006 21:39:12 +0100, The Natural Philosopher wrote:

Spent £2,000 with the local power company for a mains conection at the TV transmitter a couple of hundred yards along the hill top. ISTR that that 2k was just for the connection though may have include the cable. We used a local contrcator to dig and fill the trench.

Another site with two large solar panels (2' x 5' approx) and wind turbine couldn't hack it either. Tea leaves helping themselves to the panels didn't help that site has been abandonded.
It's worth noting that both sites had winds sufficient to break three turbines in total. One was supposed to be rated up to 120mph or so...
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Dave Liquorice wrote:

I was going to comment that some railway trackside equipment uses solar panels ...

... and that they weren't very well guarded if some dishonest soul wanted to experiment :-)
Owain
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Did that get you use of the container for the WiFi gear and antennas on the mast? or how did you handle those aspects?
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On Thu, 5 Oct 2006 00:03:10 +0100, Andy Hall wrote:

No it just got a mains power feed from the TV Tx to our site. We had already got the WiFi kit in place and mast up by "utilising and making safe" the old 405 line transmitter building and mast.
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Ah OK. So are you then able to do an omnidirectional coverage of a large-ish area or is this to get the height/distance for a longer point to point connection?
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On Thu, 5 Oct 2006 08:08:28 +0100, Andy Hall wrote:

This is a point to point site with links up to 5km or so. APs are also located at good sites and some user links are a few km long. Generally outside of the town there is a small flat plate antenna at the AP and short yagi at the user end.
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I see. So topology is kind of like a tree with some links being base-user--user                                                  |                                                   --user
?
Do you do anything to contend the bandwidth per user?
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On Thu, 5 Oct 2006 10:49:16 +0100, Andy Hall wrote:

Very ish. Think of a couple of main backbones, linked, with pockets of APs at intervals.

Yes, the Linux based servers bandwidth limit each user. Don't ask me what is actually used to do it 'cause I don't know but it works. Orginally it was free for all but one or three users would hog bandwidth and slow service down for everyone.
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OK, makes sense. It's easy enough to traffic shape to control bandwidth where the WLAN connects to the fixed service. Quite an achievement to do this. I imagine that you don't have the easiest of terrains where you are.
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