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him to use a well-known concept and to forget many of the exotic
and imaginative designs he had encountered whether where they
came from amateurs or professional as well. His wind turbine was
to be a variant of the master blacksmith windmill with 5 m Økær
blades. Special heat controls were to be made by Professor Ulrik
Krabbe, as the windmill was not going to be connected to the grid.
The tower was second hand from a building crane and had guy
wires with anchors in the ground.
Figure 16.1
Jacob Overgaard's windmill (left); Per Mannstaedt's self-made
wind turbine of NIVE design (right).
Per Mannstaedt's windmill functioned and produced well. Had
it not been installed in Denmark but in Sweden or Germany it may
well by that time have been a technological sensation and seen
as a prototype of an inexpensive and reliable wind turbine, almost
ready for a serial production. In Denmark, however, it was just
one of the many, and was soon forgotten.
The art of designing and building wind turbines at that time
did not belong to high-level laboratories with enough finances,
technological resources, and public relations, but to the people.
In Øsløs, artist
set to work in a
professional manner. He built an 11 kW windmill according to
the Johannes Juul's template with stall-regulated blades, a well-
dimensioned Nord gearbox and asynchronous generator.
Rud Ingemann Petersen
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