A tandem hydrofoil system enables an improvement in the lift-drag ratio of
a high-speed ship. The conditions for favorable application of this type of
foil structure are determined. The data on hydrofoil boats using a tandem
system are presented. The problem of the stability of the vertical plane mo
tion of a hydrofoil with bow and stern foils is considered. The general con
ditions providing the stability are obtained. (C) 2000 Elsevier Science Ltd
. All rights reserved.