Thread: Hull speed theory?
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Rodney Myrvaagnes
 
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Default Hull speed theory?
On 16 Jul 2003 05:54:55 GMT, (Sakari Aaltonen)
wrote:

I have seen lots and lots of references to the formula "X times
square root of waterline length" as defining hull speed with X
normally about 1.3 (speed in knots, length in Imperial feet.)
However, I have never seen an explanation of this.

Pictures of boats "trapped" between their bow and stern waves seem
to make sense. But they do not explain why a long wave would travel
faster than a short one.

Surely there is a book with the theory?

Any fluid mechanics text is likely to derive the speed of a surface
wave in deep water. Books on naval architecture will more likely just
state the result.





Rodney Myrvaagnes J36 Gjo/a

"That idiot Leibniz, who wants to teach me about the infinitesimally small! Has he therefore forgotten that I am the wife of Frederick I? How can he imagine that I am unacquainted with my own husband?"
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