They've just built some of these near me and I assumed they weren't turning to start with because they hadn't switched them 'on' yet. However, this was also at the time when the UK was experiencing 50-60mph winds, so maybe they were 'on', just not...'on'.,(reply>), +AboveTheSource I was once told by a native, that there will never be wind-farms on the west coast of Scotland, because the wind would blow them down. Having spent some time on the west coast of Scotland I can see what he meant. 65mph winds are considered 'calm'.,(reply>), If you mean maybe they were spinning but not generating, this is highly unlikely, unless they were damaged. If they weren't generating there would be no load to slow them down, and would increase in speed until they ripped themselves apart.<br><br>If a turbine is not generating then it will not be rotating, the blades are rotated so they are parallel with the wind direction, reducing the force on them and hence the rotational speed. If the speed is still too high then electrical braking is applied and finally mechanical braking to bring it to a complete stop.