Networks of Wind Energy Enthusiasts and the Development of the “Danish Concept” - Wind Power for the World: The Rise of Modern Wind Energy - page 152

• In many cases there is a new use of materials and components.
The way they behave, and the strength they may be conferred,
can be more diferent than expected.
• It can be difficult to predict which strains or strain combina-
tions are really serious. A weak efect which enables harmonics
to develop in the mill can thus be devastating.

• The design, described below, should be taken with the above
reservations. It should only be considered as an interim proposal
for the design, until there is a larger body of experience.” (Bugge,
1978, translated from page 151)

Figure 5.24 Cover and pages from Jacob Bugge's Bogen om Vindmoeller

(1978, Clausen Bøger, Denmark).

The emphasis from small- and medium-sized Danish wind
turbine manufacturers was to use a margin of safety commensurate
with the understanding of system loads and behaviour at the
time—that is, a very large margin of safety. The small wind turbines
of the early 1980s in Denmark and the 55 kW turbines that were
the main Danish export to the California market all were based
on that prior incremental experience dating back to the Gedser
turbine and the consistent use of conservative design principles
in the face of large uncertainty.

5.3.6 The Risø Test Station: A “Mega-Network” for
Danish Wind Energy
The wind industry actor-network that encompassed NIVE, Økær,
Riisager, Tvind, the OVE and the new entrants of Vestas, Nordtank and