I ran across a 40 second youtube link which showed a huge land based wind generator
which had gone rogue. The limiting device had failed and the wind
was really hooting. Eventually one of the blades shredded and instantly, the other two blew up. The tower fell as a result.
The same thing happened to my piling mounted Air X (non marine
version) a couple of years ago. It is part of an inverter/battery backup system for the house. I thought I'd save a couple hundred by not gettng the powder coated version, but I was wrong! The hub slowly corroded which expanded and cracked the blade between the two bolts. During a big blow in the middle of the night, the first blade went astray, and the other two followed in pieces. What I found the next morning was the generator
hanging upside down by the wires. It had been clamped securely by original parts
, but the force generated by the imbalance of the first blade letting go must have been immense. Fortunately, there was no damage to my boat on the other side of the dock
. It could easily have had holes punched in it.
I only found about 10% of the blade parts
. The biggest piece was only 6 inches long.
I am not posting
this to generate fear of wind
generators, but to encourage anyone with one to take a good look at the blade mountings and the condition of the central hub. Your life could depend on it.