History of Danish Wind Power - Wind Power for the World: The Rise of Modern Wind Energy - page 48

Tests made in 1921-1924 by the Danish State Test Authority
showed that the Agricco used the wind energy with a much higher
efficiency than la Cour's “ideal” windmill. Several developers in
other European countries introduced windmills with aerodynamic
blades after the war, but the Agricco's position was also inter-
nationally documented with tests by the Institute of Agricultural
Engineering at the Oxford University [10]. In 1925, the manu-
facturing rights for the Netherlands, Argentine and Brazil were sold
to the firm Werkspoor in Amsterdam, which produced windmills
for the use with drainage pumps. In the same year a proposal for
production of the turbine was made in the United States [11].
However, as the market for windmills was in decline, the Danish
production closed in 1926 and it must be concluded, that the
Agricco was “the right windmill, but at the wrong time”.

Figure 3.13 Pitch-regulated blades on the Agricco windmill had a steel tube

as the main structural element, wooden profiles and covering
of metal plate (Illustrations from a catalogue in The Danish
Energy Museum).

For the next two decades, the few remaining Danish windmill
producers used diferent survival strategies. From a complete
collection of notebooks from one of the medium-sized Danish
windmill producers, D. M. Heide on the island of Mors, the yearly