Developments in Theory of Bulbous Ships 



A' 





::^ 



\ 



\ 



\ 



FOR OPTIMUM BULB 



OPTIMUM 



^^ 



-2:^^ 



\ 



^ 



0.2 0.4 0.6 0.8 1.0 



NON-DIMENSIONAL DOUBLET STRENGTH, I2a/(HBV), OR SECTIONAL AREA IZr^'lBH) 



Fig. 4a - Doublet distribution for 

 sine ship (L'H= 24) 



SINE SHIP WITHOUT BULE 

 WITH OPTIMUM BULB 



\ 1.50 

 \ 

 \ 



\. 



G' -\>^ 





\ 

 \ 



\ 



\ 



y / 



y / 



1.50 1.75 



FROUOE NUMBER F^, 



0.255 Q306 0.357 



FROUOE NUMBER F^ 



Fig, 4b - Bow wave resistance of sine ship (l'H = 24) 



1079 



