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

Scot wrote:
>why if I lift my right knee, my touring boat turns to
>the outside of the lift (right) but my shorter ww boat
>usually turns to the inside (left).  If I just build up
>a little speed and coast straight then lift a knee on
>calm water, I no longer have a steady state and my boats
>always want to turn.

G'Day Scot,

Thanks for the very clear description of your observations. Why the boat
turns more easily on edge has been explained. 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!

All the best, PeterO

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