van Manen and Oosterveld 



Table 7 



Extent to which the Contrarotating Propellers are Better (+) 



or Worse (-) than the Conventional Screw Propellers 



Tanker 



60 



070 



Cargo liner 



Speed =155 knots 



Baselin e 

 Speecl«205knots 



Fig. 11 - Wake distributions in way of the propeller 

 of tanker and of cargo liner in the loaded condition. 



150 



