Linearized theory for wave-making resistance is applied to semisubmerged ships. Theoretical and experimental values are compared for submerged hulls, struts, and struts in tandem. Strut forms producing minimum wave-making resistance are calculated at several speeds and waterplane areas for a typical submerged hull. Struts are described in terms of step functions to facilitate an investigation of multiple struts including the effect of drag of decreased wetted surface area.
Presented for meeting on November 26-30, 1972.