Articles filed under Structural Failure from Michigan

Crews respond to wind turbine fire in Huron County

Firefighters and deputies were called after a wind turbine caught fire near the village of Elkton. Jeff Smith, an Elkton village official, said the fire, which broke out on April 1,  is 300 feet in the air and crews cannot reach it to extinguish the blaze. The turbine is part of the Harvest II wind energy facility placed in service in November 2012 by Exelon and is one of 33 Vestas V-100 (1.8 MW) turbines erected in Oliver, Chandler and McKinley townships.
1 Apr 2019

Hundreds of Tuscola County wind turbine motors being replaced, design flaw blamed

Gauger said it’s been determined that the “old style” keyway pitch motor is “defective” and not able to handle the load that is being placed on them by longer blades. He said the motor is essentially trying to adjust itself so that there is less drag. “What happens is on the upswing or the downswing, it’s actually got some slack in there and that’s that clunking noise that people are hearing,” Gauger said.
14 Jan 2017

Out-of-control wind turbine ‘shook itself apart’ in Huron County

The turbine exceeded designed rotation speeds — 14.4 rpm (revolutions per minute) -- and at that speed, blade tips are moving at about 200 mph, according to Exelon. It created an imbalance as blades picked up speed. At the time of collapse, rotation speeds reached 18 rpm, officials said. “At that high of an rpm, the thing just basically shook itself apart.”
6 May 2016

https://www.windaction.org/posts?location=Michigan&topic=Structural+Failure&type=Article
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