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Hi Alistair - About 9million dollars each I think the figure was (Picture of the adjacent ridge) - they work OK up to about 90kph wind speed then they turn side on into the wind - cheaper models like you are suggesting don't - the first decent wind and they either blow themselves to pieces or burn out. Those real flash models cost a fortune - they are not economical.
Last edited by loc46south; 20-12-2012 at 10:16 AM.
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