The windmills of your mind...

In the Summer, I posted about wind turbines on the tops of some blocks of flatshere. Since then, I developed a theory about them. One always turned at a constant speed, the second more slowly, the third not at all. I decided that the first one was probably actually motoring ratehr than generating, the third being jammed up solid. I developed a routine going to and from work where I would glance at the turbines, then look across the road at some flags to work out if my theory was correct. However, the results remained inconclusive.

Last week, they were all stationary and the flags hung limply. Today, the wind was up and all three rotated at about the same speed. At last, they seem to have commissioned & oiled them!