280 



IIVDRODVNAMK.S IN SHII' DLSIGN 



Sec. 51.6 



loK i||Hl9^4co '^tton of flaitmuni Biom 



ptO<54 Lwi'n 



L.J_i._L-l I L 



17 16 15 M ^ D 12 II 10 9 8 7 

 Fig. 51. R Desioned II.M.F-W.\TKni.i.sE oi-- the Ci.H'pkr Ship Flying Cloud 



356-357 of ^'()lume I, is dopiited in Fi^. 51. B. 



In Fig. 51. C there are drawn (he half-DWL'.s of 

 sL\ vessels typical of those for five different ship 

 tJTJes, operating at the speed-length or Taylor 

 i|Uotieiit T, values indicated on the diagram. 

 The SXAME RD sheet numbers are given for 

 four of the waterlines. 



One feature of designed waterlines to which 

 insufficient attention has been devoted in the 

 past is the length and position of the parallel 

 portion of the waterline. This is not to be confused 

 with the amount and position of the parallel 

 middJebody, indicated for three of the DWL's on 



Fig. 5 I.e. Table ol.d li.sts the parallel waterline 

 data for over thirty ships and ship designs of 

 various tjTJes. The lengths and positions tabu- 

 lated are not necessarily the optimum. Fig. GG..I 

 of Sec. G6.15 of Part 4 shows a range of oi)timum 

 length of parallel waterline while Fig. 66.K gives 

 the optimum fore-and-aft position of the midpoint 

 of this length, for use in design. 



51.6 Reference Data for Drawing Section- 

 Area Curves. Supplementing the lines, section- 

 area curves, and offsets of the Taylor Standard 

 Series models, reproduced in Fig. 51. A and in 

 Tables 51.a and 51.b, there are listed hereunder 



- -Porollel Middlebod"^ i- 



Cruiser A 



20 19 IS 17 16 IS 14 13 12 II 



Flo. 51. C Dekio.s'eu Halk-Watkki.ink.s <tt >i\ \ ks.ski_s <>► Imvk 'I'^ cks oh Ci.a.s.sem 



