Re: [Paddlewise] Comparing sweeps chine and round hull - Intertia vs critically damped response

From: Craig Jungers <crjungers_at_gmail.com>
Date: Sun, 6 Jun 2010 19:24:48 -0700
On Sun, Jun 6, 2010 at 4:02 PM, PeterO <rebyl_kayak_at_energysustained.com>wrote:

>
> I'm not suggesting that one hull is 'better' than the other, but would be
> curious to understand the pro's and cons of these different characteristics
> and whether they apply in general to most rounded hull vs. chined kayaks.
>
>
Matt Broze is the man to answer your question. And Matt's not some wimpy
opinionated paddler whose tests consist of paddling a boat around and then
submitting his "opinion". Not, mind you, that Matt doesn't have some
opinions. (snicker). At one point Matt had a database of paddling
characteristics for every boat introduced into the Puget Sound (Pacific
North West) area. This was made considerably easier because for over 25
years we had a kayak symposium at Port Townsend where manufacturers
introduced their boats. He may lose ground now with boats introduced that he
can't catch up with but perhaps not.

I don't know all the criteria Matt uses but they include 180 and 360 degree
turns on edge, flat, with rudder and flat, with rudder and edged.... well,
you get the idea. I don't see how it's possible to keep such tests
absolutely objective but Matt's look to be about as close as you could get
given the restrictions of a paddler climbing into a boat and paddling it
around with a stopwatch.

As far as I'm concerned, hull designs seem to follow marketing trends. Right
now we're in the middle of a hard-chined Brit-Boat with skeg era. A few
years ago it was rounder hulls with  rudders. The market also seems to be
headed into a period where more hull designs will offer greater rocker which
will, in turn, enhance maneuverability. Whether or not these new designs
actually reflect what paddlers want... or if, like fishing lures, they are
made to capture the fancies of the paddlers first and maybe only then
reflect performance issues farther down the line.



Craig Jungers
Moses Lake, WA
www.nwkayaking.net
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Received on Sun Jun 06 2010 - 19:32:43 PDT

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