Re: [Paddlewise] FW: Why does rocker and carving work?

From: Alder Creek Kayak & Canoe <aldercreek_at_qwest.net>
Date: Mon, 3 Dec 2001 14:52:53 -0800
Peter O writes:
>>But why it turns without some
> kind of paddle sweep is difficult! If I read correctly when a knee is
lifted
> some boats turn to the left, others to the right and some not at all. As
you
> say the asymmetry of the hull (bow to stern) sounds like the cause but I
> have to join the ranks of the puzzled and will wait for someone to provide
a
> reference if available - its starting to sound as though some applied math
> or a really good analogy is required!>>

Where's Mr. Broze?


According to Matt, Mariner kayaks turn by being edged alone.  No initiation
required. Something about the asymmetric shape of the hull.  Tilt right and
the hull turns left and visa versa.  Most boats I have paddled are more or
less neutral when edged and need some sort of persuasion or initiation to
turn.  Once initiated the hull will build up spin momentum as the water
pressure balance changes.  Tilt the hull either to the outside or the inside
of the turn and it will carve and turn faster. We call it YAWHOO, but that's
another story altogether.

I would think that a neutral hull would be better, so when doing a peel out
into current, a downstream tilt would allow the hull to freely turn
downstream, instead of trying to turn the hull up against the current.

Just an observation.

Steve
Alder Creek Kayak & Canoe    N   45º 39' 47"
250 NE Tomahawk Isle Dr.     W 122º 36' 16"
Portland, OR  97217          Web: www.aldercreek.com
Phone: 503.285.0464        Email: aldercreek_at_qwest.net




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Received on Mon Dec 03 2001 - 16:24:46 PST

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