[nitrogen]

Did they call it something else? It's the concept that matters, not the exact phrasing. Every structure, windmill or otherwise, has a wind speed at which it will break apart, possibly even if not rotating. It seems important to know what that speed is.

[jacquesm]

It is a very important figure and it works its way into many of the design details of the turbine as well as the tower and the foundation, if it was called something else I'd like to know what it was called as well as what kind of role GP had in the industry.