394 



Kd 



1.75 



1.5 



1.25 .' 



2.5 



2.25 



No Grid 



Grid No.l 

 a = 0.1 05 rad 



Grid No. 2 



No Grid 



Grid Nol 

 (d) a = 0.1 57 rod 



Grid No 2 



FIGURE 12 (c) (d) . Cavitation on the hydrofoil of the Clark Y 11.7 profile. 



