Wing type sailing yacht

Claim 1

A wing type sailing yacht, comprising a hull (2), a mast (3a), and a sail (3) carried by said mast, said hull having a bow (5) with a bow keel (13) and a stern (7) with a stern keel (14), said bow keel (13) having first buoyancy control surfaces (9) at its lower end, said stern keel (14) having second buoyancy control surfaces (10) at its lower end, an outrigger arm (6, 6') attached laterally to each side of said hull (2), an approximately downwardly projecting fin strut (11, 11') acting as a lateral steering wing at the end of each of said outrigger arms (6, 6'), a third buoyancy control surface (8) at one of said fin struts (11), and a fourth buoyancy control surface (8') at the other of said fin struts (11'), said first, second, third and fourth buoyancy control surfaces (9, 10, 8, 8') forming a four-point wing system for producing lift, for steering, and for stabilizing, said outrigger arms (6, 6') comprising narrow elastic surface wing type carriers having a negative sweepback, pontoons (12, 12') attached to ends of said wing type carriers (6, 6'), said third and fourth buoyancy control surfaces (8, 8') and said fin struts (11, 11') forming together an L-shape, said bow keel (13) having a high speed bow rudder (15) secured to said bow keel (13) below said first buoyancy control surfaces (9) to form a first cross-configuration (13, 9, 15), said stern keel (14) having a high speed stern rudder (16) secured to said stern keel (14) below said second buoyancy control surfaces (10) to form a second cross-configuration (14, 10, 16).