Stern shape of displacement-type marine vessel
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United States of America Patent
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Oct 4, 2011
Grant Date -
Dec 31, 2009
app pub date -
Jan 30, 2008
filing date -
Feb 13, 2007
priority date (Note) -
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Abstract
A stern shape of a displacement-type marine vessel enables reduction of the hull resistance and prevents propeller cavitation. The displacement-type marine vessel which travels in a velocity range in which the Froude number is smaller than the last hump and the stern includes knuckle lines connecting knuckle points provided on the surface of the hull, from a starting point in front of a propeller to an end point behind the propeller. A portion of the stern located inside the knuckle line in the direction of the width of the hull has a dome shape with upward curvature, and the length of the portion which has the dome shape is set to 10% or more of the entire hull length or at least the diameter of the propeller.
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