A generalized theoretical and experimental investigation of the motions and hydrodynamic loads experienced by V-bottom seaplanes during step-landing impacts

Abstract

An investigation of the effects of chine immersion on the maxiacceleration indicates that, for conventional basn loadings and fllghtpath angles, the decrease in_loe&re@ti~from imm?rsion of the chinas ip either small or entirely negligible.For higher beam loadings, however, the analysis reveals that-appreciable load.raductio~canbe expected.The results of the investigation are presented in the form of dimeslonless charts which may be directly used to determine tha water loads ani the motions of the seaplane at any instant during an impact as well as at the particular instants of maximum acceleration, maximum draft, end rebound.Extensive experimental data, obtained in the Langley impact 10 basin with floats of 22Z , 30, and 40angles of dead rise for a wide range of conilitions,are presented in support of the theoretical result-s.