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Forum Index : Windmills : What happens when things go wrong
| Author | Message | ||||
brett Newbie  Joined: 08/02/2006 Location: AustraliaPosts: 39 |
Windmill lovers beware. 
http://www.collegehumor.com/video:1804102 |
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Gizmo Admin Group  Joined: 05/06/2004 Location: AustraliaPosts: 5116 |
Those blade tips must have almost gone super sonic. There must have been a problem with the shut down. The area of destruction was pretty good I thought, the blades basically disintegrated and fell to the ground. It looks like the alternator was thrown out of the nacelle too. Glenn The best time to plant a tree was twenty years ago, the second best time is right now. JAQ |
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GWatPE Senior Member  Joined: 01/09/2006 Location: AustraliaPosts: 2127 |
I was surprised at the way the blades failed. It looked like the the blades were affected by a harmonic. The tips sort of exploded and then the blades ripped off outside of the hub. The out of balance then seemed to overload the pole and the mechanicals and part of the pole broke free. The damage was restricted to a small debris field. I have seen a small scale blade failure in a similar way where the alternator was also ripped off the top of the pole. The blades were of a fibreglass construction. I have not seen wooden blades fail this way. Is it possible that this was a test to destruction, to see what would happen. These larger units have many levels of mechanical protection, including braking and blade pitch controls. cheers, Gordon. become more energy aware |
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azland00123 Newbie Joined: 24/02/2008 Location: United StatesPosts: 23 |
Wow, I would not want that to happen in my back yard. Hay kids, stay away from the spinning blades of destruction!! 
I agree with GWatPE this seems to be a test to destruction. Would that be the job to have or what? Bob, go out and make this thing explode. Sure thing boss!! Bob |
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Bergen Newbie Joined: 19/02/2008 Location: AustraliaPosts: 19 |
Expensive test, but its about the only way of proving the engineering, safety margin etc of the design. If this was a test, it would be cheaper the the payout that one manufacture had to pay out when most of their units failed when a storm went thru and it wasn't anywhere near the guarantee survival speed. Cheers james Wind powers my house |
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| dwyer Guru  Joined: 19/09/2005 Location: AustraliaPosts: 574 |
hi everyone there a news clip found on webs site A Vestas Windmill has exploded and broken in half outside of the small village Halling in eastern Jutland. The police maintained a safety perimeter of 400 m, so no one is injured. The mill, which ran out of control and turned at a fast rate, suddenly blew to pieces with a loud sound. One third of the mill still remains and the rest is spread around the area, reports TV2’s reporter which Anders Lifland who was at site. Technicians in the mill Vestas tells Falct, that the explosion went as expected: The glass fiber in the mill could not stand the pressure and broke in half. Pieces of vreckage and remains of wings were scattered over most part of the safety peremiter set up by the police. Vestas had technicians up in the mill this morning, when the brakes of the mill failed, and the got busy getting out, writes jp.dk Vestas are staying in the area and are responsble for the cleaning og the safety perimiter, tells the reponsible from Falck. dwyer the bushman |
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