Ship Maneuvering in Deep and Confined Waters 



a) 



2 ' 



-N, 



f i3JZ3 0. 3 



b) 



.,B 



■ T 



0.2 



- -31^-3- 2.5 



(Theory) g 0.1 



Experiments : 



A Motora (-§- = 1. 83 ) 



O ( 2.^5) 



□ ( 3.66) 



• HyA ( Misc. ) 



" V Leeuwen 



005 



Zero freq. 

 for B/T = 



g 



H igh f req. 



D AEIlipsoid (Theory) 



Experiments 



A Motora (^ = 00319) 



O (0.05^7) 



D (00671) 



♦ HyA ( Misc.) 

 ■ V Leeuwen 



0.5 



10 



01 



02 



^.41 



03 0.^ 0.5 



1- <f 



Fig. 10, Non-dimensional added mass (a) and added moment of 

 inertia (b) from theory and experiments T 



this correction will also depend on (p and on lateral profile, etc. 

 For the inclusion of ship form values in Fig. 10a the diagram is drawn 

 to a base of <p - (2T/L). The ordinates are given by the product 

 - Yj^' (B/T)^, by which the intercepts on the vertical <p - (2T/L) = 1 

 then corresponds to the infinitely long cylinders. 



In addition to the ellipsoid and LEWIS cylinder values the 

 diagram include the experimental results by Motora just referred to 

 as well as a number of oscillator results, chiefly from tests run for 

 SSPA in the HyA PMM, The general character of the three- 

 dimensional corrector is clearly seen, and it is suggested that the 

 diagram may be used for approximate estimates. 



Non-dimensional added moments of inertia, in terms of 



839 



