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From: Matt Broze <marinerkayaks_at_msn.com>
subject: Re:[Paddlewise] (Paddlewise)Rudders Redux
Date: Mon, 2 Jul 2007 04:41:24 -0700
John asked about extra drag from having the kayak leaned to turn it or
correct a course. Sure, there is a little extra drag then and paddlers
should avoid rocking their kayak back and forth with each stroke to be more
efficient as well. I'd love to know how much. Does anyone know of any
studies? As John surely knows, Olympic paddlers strive to keep their kayaks
level side to side while stroking for this very reason. With a kayak without
a strong weather helm the kayak only needs to be leaned occasionally for one
or two strokes to make a course correction. This corresponds to a rudder
kayak without a weather helm having to angle the rudder (adding much more
drag) occasionally to make the same correction. If the boats both have an
equal weather helm then both will suffer greater drag in order to correct it
(whenever actively making the correction). The difference either way is that
the rudder is dragging in the water straight back all the rest of the time
even when it is not actively needed. 

Oh, I guess that is just poor design again so we shouldn't consider it a
problem with rudders in general. After all, a rudder could be made that both
deployed into the water and turned just when you needed it and then
automatically retracted into the hull leaving no hard protrusions exposed to
lacerate yourself (or others) on 9or snag tow/fishing lines)when it was not
activated. Build that rudder with solid foot pedals and maybe control it
with a little body English and I'd definitely take an interest in it, at
least if the cost was reasonable.

Matt Broze
www.marinerkayaks.com  
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