DLBA UNIVERSITY
Correcting Dynamic Roll Instability
FEBRUARY 20, 2020
Between 1970 and 2000, dynamic instability issues became a major problem as engine power density increased significantly and consumer demand for comfort rose along with it. The net result was heavier boats going faster than ever before, which led to new types of dynamic instabilities. DLBA’s founder, Donald L. Blount, was a leader in investigating and understanding dynamic roll instability.
The most frequent root cause of this type of dynamic instability is that the vessel’s center of gravity is too far forward relative to the planing surfaces. There are other root causes as well, of course, and this paper by Donald published in Professional Boatbuilder Magazine years ago is a great summary of things to watch out for to avoid issues in this area.
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