COLUMN 



B 



C 



D 



E 



F 



G 



S 

 from contours 



y2/3 



, B 

 for -of 



D-B 

 2 



D+B-2C 

 2 



S B 



for — = 2.444 



^2/3 H 



= C + E • X + F ■ X^ 

 = 6.38-0.228 + 0.031 



2.5 



3.0 



3.5 





6.20 



6.38 



6.61 



+ 0.205 



+ 0.025 



6.183 



72/3 



of 6.168 from the calculated wetted surface, a difference 



This compares with a value of 



of only 0.24 percent. * „ 



R 



Table D3 shows the calculation of ehp and ship W) values from the contours 



A 



given in Figures Bl to B39. The table is largely self-explanatory. Columns B, C, and D 



^R V B 

 give the values of — ;- lifted from the contours for different values of r and . 



' L,n/ r H 



B "^"-WL 



Tuese are corrected to the desired — — for the ship in columns E, F, and G by the interpola- 



S 

 tion process described in the text and illustrated above in its application to the 



f2/3 



contours. 



R, 



Column J shows the values of — — obtained from the nomograph in Figure B127. 



o 



The final ehp in column M is for the bare hull, without bilge keels, rudder, or other 

 appendages. 



For comparison with other models, the values of (c) and ^) for the actual ship are 

 given in columns P and Q. 



Estimates of the (c) value for a 400-ft standard ship ( ©^qq j^) can be made directly 

 from (0400 fj contours given in Figures B40 through B78. These are useful for estimates 

 and comparisons with other data when considering various alternative choices of length, 

 beam, draft, fullness, etc., before the design is finalized and an actual ehp for the ship is 

 required. 



The calculation is shown in Table D4; it follows the same method of interpolation as 

 used in Table D3 but is much shorter for the purpose in view. 



The (c) and ehp estimates made up to this point are for a ship having the LCB in the 



L B 

 position chosen for the parents of the — , — series. For a block coefficient of 0.65, this 



B H 



position was 1.54 percent Lgp aft of midships, whereas for this particular ship SCHUYLER 



D-6 



