These are Curved Twisted Surface Piercing T-Foils-Batfoils for short. The main foils are mounted at a 10 degree angle to vertical-bottom outboard-to allow the windward foil to fly clear of the water between 4 and 10 degrees angle of heel.
Painted the daggerboard black this time so that the white altitude stripes may show up better in the video.
The lifting portion of the rudder foil level with the boat at a 10 degree angle of heel.
