Environmental Engineering Reference
In-Depth Information
at the end of the 1800s. At the passing of the first Patent Bill in
1895, the forerunners of the time made sure that agricultural
processes and technology could not be patented. Inventions were
not to enrich individuals, but be at the disposal of everybody.
Especially Poul La Cour turned this production philosophy into
reality. He was no Bill Gates.
7.11.2
The “Winning” Blade Concept
The most decisive for the Danish wind power industry was the
concept used for the 27 m long blades of the Tvind windmill.
Amdi Petersen insisted that exactly that solution to be used, and
so it was. The concept was German, as mentioned earlier in this
chapter, developed and tested in practice on wind turbines and
helicopters by Professor Ulrich Hütter from Deutsche Luftund
Raumfahrt Institut at the Technical University in Stuttgart.
The original Tvind blade from 1978-1992, with Hütter designed
root system. This last original Tvind blade (replaced in 1991 by
modern Vestas blades) is exhibited at the Folkecenter.
Figure 7.43
From wind turbine R&D projects in various countries it was
known that connecting the blade to the hub was a challenge where
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