Join Date: Feb 2000
Location: Annapolis, Md
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This is not a simple question. Speed is a product of many factors such as the relationship of the amount of sail area to the amount of stability, displacement and wetted surface, the efficiency of the hull form, rig and under water foils (keel and rudder), the propensity to roll or pitch which makes sails and keels less efficient, the effectiveness of a boat hull to deal with the colision with waves without losing speed and so on.
As SD aludes, there is a lot more to to the impact of beam than the sheer width of the boat taken at one point at the rail. More significant is whether the beam is distributed much of the way fore and aft (slow), occurs far forward in the boat, (slow), whether the boat has a narrow waterline beam when standing on its feet and a progressively wider waterline beam as it heels (fast), whether there is a hard bilge which generally adds drag and requires more agressive steering angles (slow), and so on...
interested in learning more ,
when considering two similar boats , nearly same length overall and length at waterline, but a nearly two foot difference in beam. Is the narrower is faster more because of less water resistance and less because of an increase of waterline when healing?
Would the wider boat resist healing, or is the amount of heal have more to do with the righting moment, relative to ballast weight?
thanks for the feedback