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Kayak and Canoe Design Bulletin Board
Another Online Design Philosophy Resource
Posted By: Jan Gunnar Moe
Date: Wednesday, 9 June 1999, at 9:26 a.m.
Well, actually I am pointing to a commercial site.
However, I do feel completely ok pointing interested people to
for some interesting design philosophy reading.
Reading their "Model history", one can see how they have developed several models by continuing to refine the idea thay first started with.
Interesting here is to see how different goals will lead to different results:
John Winter do analyze effectiveness in water and ends up with the result that length of kayak above waterline is useless length. Correct, I believe.
The Broze brothers (Matt and Cam, Marinerkayaks) do want the kayak to be able to slide above stones when landing in surf, and then high curved bows (resulting in length above water line) turns out to be useful.
Also, I do like their thinking ending up with swede form (narrow in front) for nice body dynamics while padddling, V-shape front hull, gradually beeing changed to hardchine at cockpit and behind for reduced broaching and for ability to do leaned turns wwithout rudders.
The Mariner people do make a point that rudders do deliver increased resistance while moving. Here I have a small problem with their thinking: As long as leaning a hard chined boat will result in turning, I will believe that not leaning this boat will create turning forces boath ways. As these turning forces will cancell each other, the boat will go straigth, but the ch8ines then, I believe will move the water in a more disturbed way than if there were no hard chines enabling leaned turns.
I don't say that hard chines for leaned turns and reduced braching in following seas are bad, I just point to the possibility that this nice behaviour may have to be purchased for some price.
Well, for a discussion of the merits of narrow front, wide back, Vshape front, hard chine back, no rudder, no skeg kayaks, have a look at the Mariner page.
There is much excelent info to be found, about much more than boat design.
Jan Gunnar Moe
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