Damage to yaw head in Palestine

This is the tower after a 3 metre diameter (ten foot) turbine jumped off in reported 120 km/h winds in Palestine recently.  The 1.5 inch inner pipe of the yaw bearing has clearly bent.  COMET-ME will be using a larger pipe size for their yaw bearings in future.   However this was the standard size that I specify in my Recipe Book.

Windspeed 120 km/h is only 33 m/s, which is not exceptional for us on Scoraig, but there could be other factors at work including turbulence.  A high gyroscopic moment induced by a rapidly yawing rotor could be one.  Anyway this is where this turbine failed and failures are useful lessons.  That’s why I am sharing it on this blog.

This entry was posted in Books, CometME, construction, developing world. Bookmark the permalink.

Leave a Reply

Your email address will not be published. Required fields are marked *