Application of Wavemaking Resistance Theory 



0.7 



Fig. 1 - The parameter /3 for Models S-201 

 and S-20 2, with calculated values for the 

 ratio c^/c varying with speed. Curves are 

 Inui's experimental values. Triangles are 

 values calculated for Model S-201 and 

 squares for Model S-202. 



a considerable change in hull shape within the given constraints to work a one 

 percent decrease in the wave resistance. It was obvious from some of the in- 

 termediate quantities computed that with less constraint much more improve- 

 ment could have resulted from the same amount of departure from the given 

 hull form. The calculation was therefore repeated with the constraint that in- 

 creases but not decreases in hull volume could be accepted. Under this con- 

 straint, which is much less rigid than one which holds the sectional area con- 

 stant, the same amount of calculation as used before resulted in a forty percent 

 decrease in the wavemaking resistance instead of the one percent achieved un- 

 der the constraint of constant sectional area. 



REPLY TO THE DISCUSSION 



Pao C. Pien 



David Taylor Model Basin 



Washington, D.C. 



PROFESSOR WEINBLUM 



Professor Weinblum's comment has been studied with great admiration. 

 His work has greatly influenced my thinking in carrying out the work reported 

 in the paper. For instance, the surface singularity distribution expressed by 

 Eq. (2) is quite similar to his polynomials representing ship surface. Likewise, 



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