Principles of Yacht Design

Boat Trailer Design Specifications

G Empty weight of boat kg A Full load weight of boat kg g Ballast weight kg B Maximum beam m Loa Length overall m As Sail area m2 RM Dimensioning righting moment Nm RMjQ Righting moment at JO degrees heeling with empty weight of the boat Nm RM1 Righting moment at 1 degree heeling with empty weight of the boat Nm n Number of persons on board Fs Freeboard at mast m rm Additional moment from crew if As > RM (128-HA) the boat is considered to be a sailing boat, and the rig is to be dimensioned...

Hydrostatics And Stability

Numerical Ship Hull Form Calculations

Iooking back at hull development in the history of- yachting, it is obvious that opinion about the optimum shape of a yacht has - changed many times. This is due in part to the changing rules, but more recently the changes in design trends reflect the increasing knowledge about the physical laws governing the behaviour of sailing yachts. The aim of this book is to present the state of the art in yacht design. While current knowledge does not provide explanations for all phenomena, there is one...

Keel and Rudder Design

Wing Pressure Distribution

Fig 6.2 Pressure distribution around a wing section Most of the wing sections of interest in sailing yacht design are symmetric, as in Fig 6.1, since they have to work equally well on both tacks. At zero angle of attack the pressure distribution along the section looks in principle like the one along a waterline (see Fig 5.9), ie there is high pressure at the nose and tail, and lower pressure in between. However, at non-zero angle of attack (as in Fig 6.1), the flow becomes highly asymmetric....