ECONOMICAL CARGO SHIPS—SOME MODEL EXPERIMENTS. 51 
APPENDIX II. 
Two examples of the use of this paper are herewith given in detail:— 
(a) Find the E. H. P. for the following ship at 11.0 knots. Length BP and 
waterline, 420.0 feet. Breadth, 53.0 feet. Draught, 26.5 feet. Mid area coeffi- 
cient, .987. Displacement, 13,000 tons. <= 0-768. 
EN ES COOM RUS Sian 
Block Co Gi aeO eax orem, 
Prismatic coefficient = C, = on =.781. 
26.5 X .987 
See OEE AOS 5e 
53 4935 
Va mi) 
VL ~V 420 998" 
From Fig. 19 C for EX =.720; for C,=.784. Ai SS 
18 C for EW=.691; for C,=.767. 7 088 
Therefore, by interpolation for proposed ship with 6 =.435 C=.715 
and with 6 =.493 C=.704 
Length correction — .003, 
C for Ann Arbor 701 
C for Washington 651 
3 3 
Bead 1B, 18L 1D, (Meshineton) 222 8 re Zs E000) too: 
The actual H. P. of above ship as tested at Washington was 1,122. 
(0) What are the best proportions, etc., of a ship of 550 feet length and 21,720 
tons displacement for a speed of 16 knots, and estimate E. H. P. 
V 16 
eae EET .682 and by inspection .767 C, is the highest C, possible. 
Then mid area= Fe 1802. 
550 X .767 
For 6=.435B=64.4 feet and draught with C,,=.98 = 28.58. 
From cross curves of Fig. 18 a should =.70 and C=.730. 
e + p =1.00—7=1.00—.534 =.466. 
