44 ECONOMICAL CARGO SHIPS—SOME MODEL EXPERIMENTS. 
three models each of identical dimensions, draught and prismatic coefficient but 
with the position of the parallel middle body varied. These experiments were all 
carried out for the Emergency Fleet Corporation, and it is by their courtesy that 
they have been made available for publication to-day. 
A tabulation of the particulars of both sets of models is presented herewith. 
PARTICULARS OF MODELS. 
Design I107. 
Displacement Length, 400 Feet; Breadth, 53.66 Feet; 
Draught, 23.85 Feet; Tested at Draught Ratio of .438 
(yg) eta oo || cemees | Gameies 
Per cent 
Fore body.... 25.0 .837 42.47 
After body A DSM 817 41.63 
AX 15 758 39.51 
B 15 .790 40.51 
BX 9.6 758 39.33 
Cc 15 .790 40.83 
CX 9.6 758 39.68 
Design 1130. 
Displacement Length, 400 Feet; Breadth, 52.70 Feet; 
Draught, 23.29 Feet; Tested at Draught Ratio of .435 
Type Percentage Prismatic L. Cc. B. from 
parallel body coefficient amidships 
Per cent 
Fore body B 5.84 .709 37.8 
10.95 . 743 38.9 
D 16.7 . 7176 40.1 
E 21.19 .810 41.4 
F 26.31 844 42.8 
G 31.42 .878 36.3 
After body V 4.56 .690 37.2 
WwW 9.5 724 38.2 
x 14.45 .758 39.4 
iva 19.38 791 40.6 
The above percentages for position of L. C. B. are based on half length of 
ship, each type listed being one-half length of vessel. For convenience the parallel 
body is expressed as a percentage of the full length of the ship. 
