"Michael Daly" ) writes:

..For a constant displacement, wetted surface area
changes directly with length. Why complicate things?

because it's not true

In his book, he specifically states that there is no significant difference
in the behavior of canoe and kayak hulls. They come in the same range of
lengths and vary only in width. Most of the other parameters, such as block
and prismatic coefficients are in the same ballpark as well.

yes, compared to oil tankers, canoes and kayaks are in the same ballpark.
but compared to each other and relative to the low power source, canoes
and kayaks differ in performance. in my experience kayaks are faster than
canoes, their main attraction as far as I can tell. a lot of money goes
into advertising the differences among canoes and kayaks. I would like to
see more precise data. I suspect the subject has been studied by, say,
Soviet sports scientists, but they are not sharing their data.




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