Here are some photos of what happens when transmission failure occur in windmills.
To date, no gear oil has been invented to withstand the pressures produced within these transmissions.
Most recently, the government gave Texas A&M Electrical Engineering Department a big grant to work on it.
Previously, many others had tried and failed. This line is between Dumas and Claude in the Texas Panhandle.
So basically wind power has its own share of problems and high failure rate as well. I wonder how many of the fires we are suffering here in Texas have been caused by this?