304 



HYDRODYNAMICS IN SHIP DESIGN 



Sec. 56.6 



old U. S. Shipping Board parallel-middlebody 

 bows, midship portions, and sterns [EMB Series 

 53, reported in S and P, 1943, pp. 70-72, 257-271], 

 the models of the whole group forming the basis 

 of this study were only loosely related. Some were 



^26 



Cp-0.58 



[0.\OLf / / 



/ 



1 065 



Tq-y/VT 



—r 

 / / 



7/ 

 / 



^—J- 



/ / 



/ 



/ / 



// 



-H- 



// 



/ 



Fn-V/^ 



/ / 



^^ 



"'A 





'L 



/// 





'//// 

 \',i.'\ 



^Jl] 



'// 



■|3/^// 



10/ ' 



^ 



10// 



\5/// 



020 02/ 022 023 024 025 026 027 028 0.29 030 

 Fig. 56.E C„ Data for Fat Ships, Cp = 0.58 



Q20 0.21 Q22 aZJ 024 025 026 027 0.26 029 030 

 Fio. 56.F Cfl Data for Fat Ships, Cp = 0.60 



tested in bare-hull condition, and others with 

 various combinations of appendages. The B/H 

 ratios varied irregularly but lay within the range 

 of 2.0 to 3.0. The form coefficients were calculated 

 on a basis of length on the waterline. Residuary 

 resistances were derived by using the ATTC 1947 



020 021 22 023 024 Q25 026 027 Q28 029 030 

 Fig. 56.G Cg Data for Fat Ships, Cp = 0.62 



Cp-0.64 



V 

 (QIOL)' 



■3=14 

 '—12 



^1- 



/' 



Tq -y/A: 



7 



/ 

 V 



^2" 



y. 



Fn-V/^ 



/ / 



/ / 



/' 



y y 



y — y 



-y'- 



/ / y 



-y- 



y^ 



y 



y 



"020 021 022 025 024 025 026 027 028 029 030 

 Fig. 56.H Cr Data for Fat Ships, Cp = 0.64 



