Application of Wavemaking Resistance Theory 



Fig. 1 - Comparison of theoretical and experimental 

 C,., values of S-series models 



coefficients. All the curves show a rather well-defined trend. Near the origin, 

 the linearized theory gives quite accurate results. As the wavemaking resist- 

 ance increases, the experimental values deviate more and more from the line- 

 arized theoretical results. At higher Froude numbers the experimental values 

 are closer to the theoretical predictions. The theory always overestimates the 

 experimental values. This is a rather familiar experience when using linear- 

 ized theory for nonlinear problems. 



In view of the fact that these four models vary greatly in beam, draft and 

 angle of entrance, Fig. 1 is rather an interesting plot from which the following 

 remarks can be made: 



1. If the wavemaking resistance theory is applied to the forebody only, 

 where the viscosity effect is small, the theoretical prediction will be an upper 

 limit to the possible experimental wavemaking resistance values; and 



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