The Bird is Hatched

The rotor assembly on the middle turbine was raised today. This is the most impressive lift that is done. It is certainly the largest piece – three blades and a hub. The three winged bird has hatched.

Tomorrow, we remove the boom and counterweights on the crane, and move the crane to the north turbine to finish lifting the two remaining tower sections, the nacelle, and the rotor. It would be a miracle if we finished this on Friday. But I am guessing Monday.

Before the rotor was lifted, it was assembled. The blades were bolted into the hub. The torque on the bolts was checked. The blades’ paint was checked, and touched up where needed. Then it was lifted. A small crowd gathered to watch, and several vehicles stopped along the highway. Some neighbours dropped in. Daphne, from Spry, was laughing about how the crew put the sock on the bottom blade. “It doesn’t look like they’ve ever tried to put a sock on a two year old,” she said. They put it on backwards, and had to wrestle it off and start over.
After 6 hours of preparation, the lift was finished in about a half hour.

We had to delay things around noon – that darned wind. Wind turbines could be erected much more easily in less windy places. The crane operator will not allow a lift to occur if the wind is gusting above 11 m/sec at the top of the crane boom. And it is just as well, with a rotor lift. Blades are made to catch the wind, and the rotor assembly is stabilized by people on the ground holding onto ropes. Best not to have big winds.

A good day. And the other egg is almost done incubating.

The sock

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