Johnsson and Stfntvedt 



V,r K) knots 



V, =U knots 



Y.JLJ knotejjiltered, mean 



No. of blades 6 5 5 6 



Fins Yes Yes No No 



Figure 20 Pressure fluctuations in cavitation tunnel. Different hull - 

 propeller configurations. Measuring point B. Non-filtered 

 signals, maximum values 



638 



