Going to windward the lw board is down and ww board up. The boards are cambered. The brace limits the down angle to less than vertical so the board always contributes to righting moment as its line of lift is leeward of the CoG and must have a vertical component.
If there was no canted board to leeward the boat would rely solely on the buoyancy of the lw stabiliser for righting moment. That is OK in light wind but the dagger board increases the margin in heavier wind.
There is also the possibility of reaching with both boards partially down to reduce overall drag.
On 29/04/2016, at 7:45 AM, "lucsimard@ymail.com [harryproa]" <harryproa@yahoogroups.com.au> wrote:
About the canting dagger, seem to me it is a problem that it increases the heeling moment (boat will overturn in less wind or sail area has to be reduced) ... finding a way to fix it far to the lw side (of the lw hull) so the lifting moment fight heeling forces. Like DSS lateral foil or curved lateral foil ?
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Posted by: Rick Willoughby <rickwill@bigpond.net.au>
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