Re: [Paddlewise] drag vs. viscosity

From: Nick Schade <nick_at_guillemot-kayaks.com>
Date: Fri, 21 May 2004 10:52:29 -0400
Peter,
  If there was something about waves that reduced drag on the hull then 
you would expect the same conditions that let you paddle the SOT as 
fast as the other kayaks would also make the other kayaks faster so you 
would then not be able to keep on in the SOT.

  Unless you are going the same direction as the waves (i.e. 
occasionally surfing) the waves are going to increase drag on the boat. 
However, this effect will be more pronounced on some hull shapes than 
others. So it is possible that the SOT is not slowed down as much as 
another boat in certain conditions.

  I suspect the reason boats feel more sluggish on flat water is the 
lack of reference points for speed. In rough water there are always new 
waves approaching so even if you are dead in the water you get the 
illusion of motion. I'm sure many people have spent time paddling 
against a head wind and felt like they are doing OK until the look at a 
landmark only to find it hasn't moved.
Nick

On May 21, 2004, at 5:56 AM, PeterO wrote:

> Michael wrote: -
>> It definitely does if there is no wind and waves.
>> I always feel sluggish in such conditions, even
>> though I know it's an illusion.
> What is happening to the wave energy in a slightly choppy sea (not a
> following sea)? Is it possible that waves of a certain height and 
> period
> reduce the drag on a hull?
> <snip>
> I hesitate to quote experiences in a kayak as they have no validity in 
> a
> technical explanation! But of course I'm going to:~) Anyway I notice in
> slightly choppy water I can readily paddle a sit on top, as fast as the
> fastest sea kayak we have over here.
>
> The fastest sea kayak we have in Australia is something called a 
> Mirage -
> ironic name considering the nature of my question!
Nick Schade

Guillemot Kayaks
824 Thompson St
Glastonbury, CT 06033
USA
Ph/Fx: (860) 659-8847
http://www.guillemot-kayaks.com/
***************************************************************************
PaddleWise Paddling Mailing List - Any opinions or suggestions expressed
here are solely those of the writer(s). You must assume the entire
responsibility for reliance upon them. All postings copyright the author.
Submissions:     PaddleWise_at_PaddleWise.net
Subscriptions:   PaddleWise-request_at_PaddleWise.net
Website:         http://www.paddlewise.net/
***************************************************************************
Received on Fri May 21 2004 - 09:41:13 PDT

This archive was generated by hypermail 2.4.0 : Thu Aug 21 2025 - 16:31:14 PDT