Resistance tests of a series planing Hull forms with 30° deadrise angle, and a calculation model based on this and similar systematic series

In addition to the well-known systematic series planing hull forms with a deadrise angle of 12.5o as presented by Clement and Blount (DTMB), and a similar series by Keuning and Gerritsma, in this paper the results of the tests on a 30o deadrise series are presented. The combined data of these series are fitted to a regression model for total resistance, trim and rise of centre of gravity. This regression model is verified by a comparison with existing model data. Although in general the calculations show good agreement with experiments, the need for additional data for a deadrise angle between 12.5 and 25o became obvious. Additional resistance test results of two models with varying deadrise and rising buttock lines in the aft part of the hull are presented. Regression of these data results in simple expressions to take these effects into account.