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I really wasn't sugesting a bird strike would have caused this sort of damage. The blade system of most wind turbines is made from Fibreglass and flexible wooden stays internally. In the event of a blade destructing generally the entire tower,Nacelle and blades are fully destructed.
An example of the forces involved. The blades on the wind turbines at Wattle Point in SA. Opposite Adelaide are 60M long and weigh in at 12 Tons. Out of balance forces with these weights are huge.
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