As an amatuer boat builder, not having been properly schooled in the
mathamatics of nautical architecture, I would offer the idea that,
in general, a full ended hull would have a "U" shape to the cross
section at or near the waterline entry point and a fine ended hull would
have a sectional shape that is "V" shaped at the waterline entry.
The relationship of the sectional area at the waterline entry to the
flair and/or fullness of the bow is something that has provided me with
countless hours of thought and speculation. To reduce it to a numerical
quantity would seem to take the fun out of it.(just my approach)
I have been particularly intrigued with the effect
that these shapes have in controlling bow lift and boyancy and the
effect of throwing off spray with small boats...canoes, kayaks, etc.
The bow shapes of several of the designs of L.F. Herreshoff seem to have
mastered this effect and his balancing of fineness and flair at the bow
apparently work very well for the particular conditions designed for.
If you have access to the book "Sensible Cruising Designs" , look at
design number 98,"Rozinante" and design number 101"White Water Racing
Canoe" to see two variations on this idea.

Pablo wrote:
Hi,

I would like to know what is the difference geometrically between a full
ended and a fine ended hull? I was reading the John Winter's webpage
(http://www.greenval.com/jwinters.htm...cal%20articles) Part1
(Frictional resistance) in the effect of shape section and could not
understand what was the difference between these two types of hull. If you
have an image that could help me understand it would be great. Thanks for
your help in advance.

Pablo
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