214 



^«2 



FIGURE 9. Vorticity distribution of M.No.M-4 at 

 Sq.St. 1/8. 



20 '/. ol U 



/ /t t 'r^""^~- 



FIGURE 10. Velocity vectors on y-z plane due to stern 

 vortices (M.No.M-7, Sq.St. 1/8). 



-10 - -%. 



-'- -.-^ .1 , ? / ? 



/ / 4 

 N\\ I I I I t J A ^ ^ 



^\\\ r T / ///-"- 



4 6 6 10 





^i. y y .' ^ 



2' 



f ' I 



oi ; 1 



\ \ \ 



s \ \ 



_4V N "^ ' 



fr- 





/ 



:| 



I 





7 A^^-^r 



m^: 



'< '. \ 



•/■ / / 



.' ,' /.J 



• ^ ^ -* 



■ -- -■ ---6 



FIGURE 12. Vorticity distribution of M.No.M-7 at 

 Sq.St. 1/2. 



\'V 



FIGURE 11. Velocity vectors on y-z plane due to stern 

 vortices (M.No.M-4, Sq.St. 1/8). 



FIGUfffi 13. Vorticity distribution of M.No.M-7 at 

 Sq.St. 1/4. 



