327
of solid wood, the tower was an 18 m tubular tower held up by
four wires. The water brake was a closed Culver-type.
Figure 13.9 Water brake used on Gerlev windmill (left); Hydraulic
dynamometer of the bladed type (Culver-type
4
) (right).
Figure 13.10 Water brake windmill in Gerlev.
4
Culver, E.vP. (1937) Investigation of a Simple Form of Hydraulic Dynamometer, in
“Mechanical Energy”, School of Engineering, Princeton University, p. 749.
Developing Water Brake Windmills