The ORMA60 tris can fly on one ama with the main hull and the windward ama airborne. They have recently added some lifiting foils to the rudder (to control pitch) but the daggerboards in the amas have been "bannana" shaped for a quite a while now. The bannana board generates a good deal of lift - otherwise, the tiny ama would not be able to support the full weight of the boat. They do not get all three hulls completely airborn (unless it's a REALLY big wave).