If it is ok to use asymetrical daggerboards or to apply an angle of attack to symetrical ones, then the next step is to tilt the boards from vertical, say 45 degrees, obtaining some vertical lift.
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<br>By doing so, we get the advantages correctly listed in this thread AND the vertical lift. The vertical lift raises the boat out of the water, reducing the wetted area and enabling planning at lower speeds.
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<br>If we want to avoid "tacking" the daggerboards, why not use a trimaran with the amas slightly higher then the main hull so that when one board is in the water the other is (at least partially) out?
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<br>If this sounds good, take a look at aegeanmarine.com and you will see an american made hidrofoil assisted folding trimaran that has exactly those features.
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<br>Fair winds,
<br>Luiz
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