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William R. Watt
 
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Default Hull speed theory?


Sakari Aaltonen ) writes:

Thanks, but I'm not looking for _opinions_, really. I went to the
library today and found quite a number of books on fluid dynamics.
Some had sections on surface waves; the mathematical derivation
shows, indeed, that the propagation speed of such a wave is directly
proportional to the square root of the wavelength. I'll need some
time to work through that derivation...:-)


well, you start with V = N x L where V = wave velocity, N = frequency of
vibration, and L = length of wave. that dosn't give you the square root of
wavelength, but something about the boat sitting down into the wave trough
gives an equation with boat length (water line length) as a factor but
darned if I remember how. I've seen it in one or two library books but
never wrote it down.

you'll have to post the derivation so its preserved in the newsgroup
archives for all time.

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