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.

About hugh

I live off-grid in NW Scotland and have spent my life playing with wind turbines. I also love small hydros. Hands on renewable energy is my thing and I like to learn and to share my experiences.
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