All of the theorist's ....are missing one point
The original scenario is also a little vague....consider the viaduct /aquaduct to be a limited volume of water [as opposed] to the open sea and also negates in
considering hull speed and the increase in the velocity of water due to the limited volume of water under examination....
Ask any Master of a 100,000 ton vessel entering a harbour or river mouth of a river......
Courtesy of Doctor Rick......
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Date: 07/07/99 at 12:09:48
From: Doctor Rick
Subject: Re: hull speeds of displacement hull boats
Hi, Colin, thanks for writing!
The question and answer you refer to has been there a while and I
guess the original writer must not have written back saying that
this was not what he meant. I have heard of the relation you
state, between length of the waterline and "maximum" speed of the
boat, and I'm pretty sure this is what the writer meant, not a
relation between speed and _height_ of the waterline.
It is my recollection that this hull-speed limitation is
determined by the wavelength of the bow wave - that the distance
between crests of the wave increases with boat speed until there is
a crest at the bow and another at the stern, and the centref the
boat is essentially unsupported.
It would thus sink lower in the
water relative to the wave height at bow and stern.
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There is a following mathematical proof .......but wont bore you with it...
Derek