Model Tests on Contrarotating Propellers 



COMPARATIVE TESTS WITH SHIP MODELS EQUIPPED WITH • '^• 



CONVENTIONAL AND CONTRAROTATING PROPELLERS '■' . ' 



Description of Hull Forms and Propellers ' ., '" 



Comparative tests have been carried out with a 32,500-DWT tanker model 

 and a cargo liner model both equipped with successively a conventional screw 

 propeller and contrarotating propellers. The principal dimensions of these 

 ships are given in Table 2; the hull forms and the stern arrangements are given 

 in Figs. 5 and 6. 



Table 2 

 Principal Dimensions of Tanker (Fig. 5) and Cargo Liner (Fig. 6) 



Fig. 5 - Body plan and stern arrangement of tanker 



Fig. 6 - Body plan and stern arrangement of cargo liner 



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