A keel breaker is a counterweight hull-piercing device. It was originally designed by Mariano di Iacopo (or Jacopo) 1382-c.1453), known as Taccola. Like many men of the early 15th century, Taccola was ...

The Vikings gave shape to the hull using this "clinker ... In marked contrast to modern sailboats, the ships' lack of a big, vertical keel meant that they were highly maneuverable and could ...

The physics of a foiling AC75 are as simple as they are complex, but envision a large windsurfing board with towering sails; there is no heavy keel ... a boat is foiling, however, the hull becomes ...