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

----- Original Message -----
From: "Steve Scherrer" <Flatpick_at_teleport.com>
<< snip >>
> I'm being pretty picky here but......if a boat has any tendency to turn
when
> leaned isn't there going to be resistance, while obviously not enough to
> turn the boat against a current flow, but enough to *not* allow the boat
> free release to the downstream side.  I don't really want my boat to
resist
> an inside edge turn by trying to turn the hull the opposite direction.
I'd
> rather it was neutral so *I* could make the call, inside or outside edge,
> starboard or port turn.

Okay, thanks for clarifying.  I think I understand your statement now.  You
are saying that when edging is constrained to one side only, as when
crossing an eddyline, that you still want the option of being able to turn
the kayak in the same direction as the side that was edged.  Is this
correct?

My answer is that in this case, the question is moot, because the current on
the far side of the eddyline will inherently dominate over the tendency of
the boat to turn away from an edge.  This is the because the edged-turning
momentum is created by the bow moving forward through the water and
displacing water preferentially to one side.  However when entering current
at an angle, the bow is no longer moving forward through the water, and the
water pressure will be on the opposite side of the one that causes a carved
turn. And thus the turning moment will point downstream, regardless of the
YAW... ;) Even very weak currents will dominate, as long as we are talking
about sea kayaks.  Not even a rudder hard over would any difference here
(i'm guessing). But I haven't tested it... Are your comments spoken from
experience? Which kayak were you paddling?

And by the way... does the HOO stand for what you might say if you forget to
yaw when crossing an eddyline... "Hoo boy, this water is COLD" (after you've
flipped over).

I will probably swing by AC's winter party tonight. Will you be there?

Kevin

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