Wereldsma 



VERTICAL BENDING MOMENT 



F. 3 



-10 



Fig. 8 - Recording of the horizontal and vertical 

 bending moment variations of the five-bladed 

 propeller 



FOUR-BLADED 

 FORWARD PROPELLER 



PROPELLER 

 ROTATION 



20% OF FORWARD ^ 



PROPELLER RADIUS^.* 



FIVE-BLADED 

 AFT PROPELLER 



PROPELLER 

 ROTATION 



20% OF AFT 

 PROPELLER RADIUS 



Fig. 9 - Instantaneous thrust eccentricity of (left) 

 the four-bladed propeller and (right) the five- 

 bladed propeller 



244 



