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Our thanks to Beth Buczynski for her article Helical Robotics Debuts Wireless Turbine-Climbing Robots at EarthTechling.
From the text:
Wind turbines look like giant pinwheels, light-colored towers rotating purposefully in the breeze. At least from a distance. Stand right underneath a wind turbine, and you’ll see that there’s nothing delicate about these marvels of renewable energy. As turbines increase in size, some with blades over 300 feet in length, its become nearly impossible to perform thorough inspections for damage or malfunction by hand.