--- On Wed, 5/11/11, Rick Willoughby <rickwill@bigpond.net.au> wrote: I have done polars for this design and it looks quite good.  There is a performance advantage in having small rudders and cambered elevating centreboard over two large rudders.  I also expect the control will be more stable as the centreboard has a set level of immersion and is not likely to ventilate easily.  Rick    ***** That is exactly what my intuition tells me. How did you end up with this result? And is there a big performance difference? Curious mind would like to know...   Arto   *********************

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