Budal's latching-controlled-buoy type wave-power plant

Results are presented from previous investigations of three different versions of latching-controlled, axisymmetric, wave-power buoys, intended to operate in the heave mode, and to force-react against anchors on the sea bed. One of them had hydraulic machinery for control and power take-off, while the two others had a latching mechanism for control and pneumatic power take-off. One of the three versions utilised an oscillating water column contained in a heaving structure. Hulls of various shapes were examined: cylindrical with hemispherical base, conical with the widest part up, and, finally, spherical. Model tests were performed that indicate reasonable agreement with theory. Technical assessments of full-scale power buoys indicated the necessity for further development work on some of the components.