Oscillating -bladed Propellers 



Fig. 8b - Cavitation patterns for 

 oscillating -bladed propeller, y = ±3°, 

 </;= 



Fig. 8c - Cavitation patterns for 

 oscillating-bladed propeller, with 

 oscillation in advance, y - ±3°, 

 0= 30°, d = 15°, J = 0.75, a = 4 



On the whole, dephasing in advance the oscillation relative to the incidence 

 is beneficial as regards the face cavitation, but causes a loss as regards the 

 back cavitation near the hub. 



1513 



