Quote:
Originally Posted by dbledan
We had turbines at an old leeds office building, 3 smaller ones. When the wind blew it sounded like you were at an airport. I am curious if they have resolved this now or not. The sound drove me nuts and I would never subject myself to that again. Do you know if the units are noisy? Just something to consider.
The 3 turbines powered exit lights and some emergency fluorescenct lights with a fairly sizable battery bank. This was 10 years ago so things have likely changed a lot by now.
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Some of the units I've seen advertised have 5 blades. I stayed in a park in Las Vegas last January and had a neighbor with a pair of wind turbines. They had at least 5, maybe more blades and they didn't appear to be any noisier than a house fan. They were turning pretty quick even in low wind.
I know that "The Company" which was GI slang for one of our "Alphabet Agencies" working in Vietnam during the war had an airplane with a 6 bladed prop and it was quiet. In the late 70's I watched one take off from a local airport and it was amazingly quiet.
Apparently the more blades the quieter they can be and I suppose blade shape makes a difference too.
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