Hi Stewart -Kirt

or a tri --there are great foiler tri designs with the design intended to lift the leeward working ama -
A center planning type tri hull could be added .

Weight complexity etc would be the drawbacks of the planning hull Kirt descibed .
Both hulls would help but when is a cat sailed level at speed ,

Think there is suffecient area in a hull as descibed along with a small forward angled lifting foil set at correct cant to plane .

Some in certain flat water high wind broad reach conditions have felt this on I-20s ,-the boat hitting over 25 on the GPS and feeling really skittish at those speeds ,-trying to plane.

The combinations of proven ideas and design concepts have to be refined ,sometimes in a trial and error process but the intricate combinations of solutions to the planning cat hull are progressing .
Fun stuff ,-hope we see some planning types soon .
Carl