Propeller Exaitation and Response of 230000 TDW Tankers 



5-bladed propeller 

 with fins 



without fins 



70 90 



Number of rcvs/min 



Figure 5 Pressure fluctuations in full scale. "Thorshammer" (first 

 ship) with and without fins. Transducers 3 and 5 resp 

 (measuring point A, see Table II and Figure 2) 



623 



