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At 00:02 -0700 04/08/2009, Bernard Cleyet wrote:
It isn't the steady winds that I worry about. A feathered blade can
Calculating the "wind resistance" of current ones, I think is an easy
engineering exercise. The blades are made to be completely feathered
already?
handle a substantial wind speed. I've flown around in airplanes with
a propeller or two feathered at speeds up to 250 knots with not
problems. What I don't know is how well a turbine blade that may be
as much as 30 meters long would handle gust loading that could easily
be non-constant over that dimension, if the hub structure could be
damaged by violent slewing as the wind gusts changed direction
quickly.