Johns son and Stfntvedt 



5. Measurement of hull vibrations 



Corresponding model experiments were carried out, including 

 studies of propeller cavitation behind complete ship models. In addi- 

 tion the model investigations included measurements of wake patterns 

 and static pressure with and without propeller in the towing tank as 

 well as in the cavitation tunnel, special streamline tests and tests 

 with a ducted propeller. 



The present report will deal primarily with items 4 and 5 

 above. The results of the measurements under items 1-3 above were 

 summarized in|jlj . 



III. SHIP AND MODEL CONFIGURATIONS TESTED 



The main dimensions of the ships are : 



Length between perpendiculars L = 1020'-0" = 310. 89 m 



Breadth 



Draught, fully loaded condition 



Draught, ballast condition, fore 



Draught, ballast condition, aft 



Displacement 



Deadweight 



Block coefficient 



Capacity of cargo oil tanks 10 124 300 eft 



Clean water ballast CT No 3 836 900 eft 



Class Det norske Veritas + 1. A. 1. "Tankskip for oljelast, F, EO. " 



Main engine, General Electric steam turbine, 32 420 SHP (metric) 

 at 85 rpm 



Model scale 1:43.5 



The different ship and propeller configurations tested are sum- 

 marized in Table 1. 



584 



