Dave Carlson made up a Cheetalope A cat with an in verted A type foil I believe.

Check this out: http://www.fastsail.com/catcobbler/ and http://www.fastsail.com/catcobbler/afoil4.html

I would think it would not be too hard for one of the more creative A cat builders to put in some sort of angled dagger board slots, front and rear, where you could slide in 4 regular dagger boards, one at each corner, at say a 45 degree angle, which at speed would lift both hulls up evenly, by the four corners (where the daggers would be, or around the beam mount areas), and use standard rudders (although deeper) to steer it.


The biggest problem I see is trying to use T foils, where it's a pain in the butt to put them in/take them out, when trying to launch the boat, like the old Hobie Tri Foilers, not to mention the 'weed catching' ability of a T foil.