On Sep 25, 9:49 am, Wm Watt wrote:
It's not so much hull resistance you need to see, but (horse)power
requirement for the speeds plotted along
the bottom of the graph. Then you can judge how fast the boat can go
given your individual power ability.
Over distance the "average" paddler can maintian 1/20 (0.05)
horsepower.

However, calculated hull resistance is only a base measure. On top of
that you have to overcome wind and waves
when they are against you, or add them to your effort when they are
with you. I attempted to roughly broke these down near the bottom of this
page:www.ncf.ca/~ag384/Boats.htm

Ok, but to restate my issue, I'm trying to understand why the KAPER
curves show no advantage for a longer boat. Of course I'm trusting
that Kayak Foundry is implementing KAPER correctly. As an example I
have two crude designs posted here;

http://home.att.net/~galt_57/b014.yak --- a very slender ~15 ft boat
LWL= 14' 7.4"
http://home.att.net/~galt_57/b022.yak --- a very slender 22 ft boat
LWL= 21' 10.8"

They both have the same 17" waterline beam. Looking at the curves I
can't see anything that hints that the "hull speed" is increased for
the 22 ft design.