Why Wind Turbines Have Three Blades

Re:Why Wind Turbines Have Three Blades by mikeash on Friday May 06, 2016 @12:34PM (#11645046)

The current rule is something like 1,200/year. There are about 143,000 bald eagles in the US. The 4,200 number is set at a level which they think the species can sustain. I don't know why bald eagles would be more likely to be killed by turbines, but apparently they are:

http://www.fws.gov/midwest/wind/wildlifeimpacts/index.html

"Not all bird species are equally vulnerable to wind turbines. Eagles appear to be particularly susceptible."

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Re:Why Wind Turbines Have Three Blades by Aelinsaar on Friday May 06, 2016 @02:34PM (#11645772)

Not all birds fly the same way, in the same regions, at the same altitudes. Balds eagles tend to soar and hunt in places we like to put wind turbines. Small birds tend to move smaller distances, often in about 100m around a water source.

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Re:Why Wind Turbines Have Three Blades by scblock on Friday May 06, 2016 @04:35PM (#11646549)

Thanks.

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