Date: Fri, 19 Feb 1999 10:52:47 -0800 (PST)
From: Chris Rolt <chris_rolt@yahoo.com>
Subject: Re: baidarka hull speed, etc.
To: baidarka@lists.intelenet.net
---Gardner Congdon <congdorg@bc.edu> wrote:
>
> I've been following these posts with some confusion- could somebody
> explain the difference between a swedeform and a fishform hull? Also,
> regarding hull smoothness, didn't the America's Cup boats start using
> hulls with a vertically aligned grooved finish to increase hull
speed? I
> believe the grooves were less than 1mm in depth. Maybe this isn't
> applicable to the lower hull speeds of human powered craft.
> Thanks,
I think Dennis Conner (stars & stripes '87) used the 3m coating that
had fishscale like grooves.
I don't think those boats ever did much better than 10 - 12 knots;
and the margins of victory were close enough that anythingt that
provides an advantage is worth it.
Although doesn't drag get cubed if you double the speed?
I'll look forward to seeing your craft out on the Charles!(I'm in
West Roxbury...)
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