Hi George,
I think the following links could be useful to you.
prod.sandia.gov/techlib/access-c … 132569.pdf
and
I don’t believe that the NREL 5 MW turbine blade properties are based on manufactured blades, but are representative of a typical blade that length. The Sandia report presents a blade structure that was created to match the existing blade properties. The forum topic covers a similar discussion.
Hope this help,
Kieran