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industrial group included a small factory in Aalborg, Skandinavisk
Aero Industri, which started production of private aeroplanes a few
years before the war. This company played an important role in the
development of the new product.
Figure 3.16
When the Second World War caused problems with oil
supply, Lykkegaard was ready with a wind power solution.
During the years 1940-1942, 60 of the factory's 18 m windmills
were supplied to small power stations (Photo: The Danish
Energy Museum).
In August 1940, after only a few months the decision to go
ahead was taken, a prototype wind turbine was tested at one of
the company's cement factories in Aalborg. The two blades on
the upwind-placed rotor had aerodynamic profiles, developed
by K. G. Zeuthen, engineer and co-founder of the small aeroplane
factory. The 17.5 m diameter rotor was driving a 60 kW generator
through a gearbox, developed on basis of the high-precision gears,
produced by FLS for the cement industry. The gearbox casing with
bearings for the main shaft also acted as an important structural
part of the unit, placed on the top of the 24 m steel lattice tower.
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