Kayak and Canoe Design Bulletin Board

Re: Another Online Design Philosophy Resource

Posted By: John Winters
Date: Monday, 21 June 1999, at 1:05 p.m.

In Response To: Another Online Design Philosophy Resource (Jan Gunnar Moe)

> 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.

Well, not really useless. Overhangs serve a lot of other functions. The key to performance, however, is the waterline length and that doesn't usually have much to do with the overall length.

(SNIP{)

> 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 think the Broze's over state their case. Matt oftens supports his case by referring to the tank tests done by Sea Kayaker. Without going into a lot of detail I suspect the Sea Kayaker tank test had some flaws and would excersize some care in drawing conclusions from them.

Cheers,

John Winters

Messages In This Thread

Another Online Design Philosophy Resource
Jan Gunnar Moe -- Wednesday, 9 June 1999, at 9:26 a.m.

Re: Another Online Design Philosophy Resource
Nick Schade -- Thursday, 10 June 1999, at 10:27 a.m.

Re: Another Online Design Philosophy Resource
John Winters -- Monday, 21 June 1999, at 1:05 p.m.

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