Application of Wavemaking Resistance Theory 



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DERIVED FROM EXPERIMENTS USING NORMAL WETTED SURF4CE 



DERIVED FROM EXPERIMENTS CORRECTED FOR TRUE WETTED SURFACE 



DERIVED FROM MICHELl'S INTEGRAL 



1.5 



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1.9 ZO 



.50 

 F 



Fig. A - A comparison of the theoretical and 

 experimental wavemaking resistance results 

 of Models 755, 825, and 829 



From the above discussion, then, it should not be unduly criticized for th 

 fact that only Professor Inui's comparisons have been shown in Fig. 1 of the 

 paper. 



The fact that a fat ship can have smaller wave drag than a thin ship has i 

 been stated in the paper as a new result. It is merely used to make the argu- 

 ment that the existing theory can be applied to a fat ship with very small wavi 

 drag as well as to a thin ship. The term "fat" has been used to indicate a lar 

 displacement-length ratio rather than a large beamlength ratio. 



In the light of Taylor's findings, R^ may seem to depend strongly upon th 

 pi-ismatic coefficient. However, our experience based on the experimental r€ 

 suits of models derived according to the method described in the paper is tha 

 the prismatic coefficient may not always be the dominating factor upon the wa 

 resistance. For example, our most recent experimental results of a model ■« 



1149 



