The turbine in the news that was on fire is one of the bigger ones.

I've been told that the firm that makes the "Proven" turbines has run into difficulties because of the number of repairs tht they had to make to their products.

I decided on an "Evance" because I was impressed by what I could see of their engineering standards. It's supposed to be OK up to at least 130 mph winds. It "feathers" the blades when the wind gets enough to put it over its maximum generation rate. The blades are not quite mounted in a radial position at the hub but instead at a tangent to a circle of about 2' diameter. They have an elegant spring system that rotates them along their length as the speed of the wind increases.

The "Proven" turbines face away from the wind and as the speed. increases the blades fold away from the wind along a hinge line near the hub.

The figures that I have been given suggest an efficiency of about 58% for the "Proven" and 93% for the "Evance".