Water-Pressure Distributions During Landings of a Prismatic Model Having an Angle of Dead Rise of 22 1 deg./2 and Beam-Loading Coefficients of 0.48 and 0.97

Smooth-water landing tests of a prismatic model having an angle of dead rise of 22 12 deg were made as part of a landing investigation being conducted at the Langley impact basin to determine the distribution of water pressure on seaplanes. Landings were made for beam-loading coefficients of 0.48 and 0.97 at fixed trims between 0.2 deg and 30.3 deg for a range of initial flight-path angles from 4.6 deg to 25.9 deg and also for 90 deg. Initial impact conditions, over-all loads and motions, and maximum pressures are presented in tables and figures for all the landings, together with instantaneous-pressure-distribution and wave-rise data. The experimental wave rise, peak pressures, and pressure distributions are found to be in fair agreement with the predictions of the available theory however, better agreement is obtained by modification of the theory.