Sunday, June 21, 2009
Another shot of the many hundreds of windmills on the hills surrounding the Walla Walla Valley. They produce quite a bit of power, and I've been told by an engineer that even though they seem from a distance to be turning at a comfortable pace, the tips of the blades of these windmills are spinning at close to the speed of sound. This is a hazard for birds, as well as not being as efficient as they could be, so the newer windmills spin at a slower rate. Each blade on these windmills is, from my estimates, over 60 feet long. Anyone from this area know the exact length?