298 



HVnROnYNAMICS IN' SHIP DESIGN 



Sec. 563 



(c) Tables V and VI, self-propulsion data for one 

 model and model propeller 



(d) Tables VII through XII, body plans, out- 

 board profiles, details of appendages, and section- 

 area curves for the six models 



(e) I'able XIII, drawing of the model propeller 

 tested 



(f) Tables XIV through XIX, curves of R^ ,Rb, 

 and expanded P e for the six models 



(g) Table XX, curves of self-propulsion data from 

 the one model tested 



(h) Table XXI, curves of Ct for the six models 



(i) Tables XXII through XXIV, curves of Cp 



and Ct for the six models 



(j) Tables XXV and XXVI, friction-resistance 



coefficients / in the dimensional formula Rp = 



jgyi.s25^ for varied lengths of both model and 



ship 



(k) Tables XXVII through XXIX, values of 



A'^^ A'^^ and A='^'' for all models. 



There have been published, to the date of 

 writing (1956), some 160 SNAME Resistance 

 Data sheets. These carry complete descriptive and 

 test data for the same number of models, repre- 

 senting a great variety of ship sizes and types. 

 The observed resistance data are supplemented by 

 predicted resistance data for geometrically similar 

 ships of appropriate standard length, say 100 ft, 

 400 ft, or 1,000 ft. An example of the latter is the 

 Uner Normandie, RD sheet 39. Two sets of resist- 

 ance data sheets are included in Sec. 78.16, made 

 up for the model tests of (1) the ABC ship with 

 the centerline skeg and transom stern, TiMB 

 model 4505, and (2) the ABC ship with the arch- 

 type stern, TMB model 4505-1. The RD sheets 

 for TMB model 4505 were also published in 

 7th ICSH, 1954 [SSPA Rep. 34, 1955, pp. 302- 

 304]. 



There are available, to accompany the whole 

 set of sheets: 



I. Explanatory Notes for Resistance and Propul- 

 sion Data Sheets, SNAME Tech. and Res. Bull. 

 1-13, Jul 1953 



II. Index to Model and Expanded Resistance 

 Data Sheets Nos. 1-150, SNAME Tech. and Res. 

 Bull. 1-14, Jul 1953 



III. Summary Sheets, 7 in number, containing 

 summarized data for RD sheets 1 through 160, 

 and additional information needed for analysis. 



A series of 29 data sheets containing the model- 

 test data on that number of fishing-boat hulls. 



most of them run at .several displacements, are 

 published by Jan-Olof Traung on pages 281-310 

 of the book "Fishing Boats of the World," re- 

 viewed in the first part of Sec. 76.12. These 

 sheets are similar to the SNAME RD sheets 

 described elsewhere but contain less information 

 per sheet. 



There has recently been issued (November 

 1955), Part 1 of a group of "Fishing Boat Tank 

 Tests," comprising data sheets on 150 models of 

 fishing craft. Copies of this catalog may be 

 obtained on application to the Fishing Boat 

 Section, Technology Branch, Fisheries Division, 

 Food and Agriculture Organization (FAO) of 

 United Nations, Rome, Italy. 



56.3 Systematic Resistance Data From Model 

 Series; Taylor Standard Series with Contours of 

 i2fl/A. To make possible the calculation of the 

 approximate residuary resistance of ships of 

 widely varied shape and proportions, D. W. 

 Taylor devised his now-famous Standard Series, 

 with the thought that the residuary resistance of 

 a ship could be predicted reasonably well from 

 the measured resistance of a model of the same 

 proportions. 



Taylor's primary purpose was supplemented 

 eventually by another, equally valuable if not 

 equally important. This was the gradual but wide 

 acceptance of the Taylor Standard Series residu- 

 ary resistance as the yardstick for evaluating the 

 worth of a particular shape of hull. This is done 

 by comparing its residuary resistance to that of 

 the Taylor Standard Series parent form of identical 

 proportions. So outstanding was the shape of this 

 parent form, derived from the hull of the British 

 armored cruiser Leviathan [S and P, 1943, p. 181], 

 that even a half-century later it is a definite mark 

 of achievement to beat the Taylor Standard 

 Series in that part of the speed range where 

 optimum ship behavior is sought. 



The parameters varied in the Taylor series, 

 now known as the proportions of the models (and 

 ships), were: 



(a) Beam-draft ratio, B/H 



(b) Displacement-length quotient, A/(0.010L)^, 

 defined in Appx. 1 



(c) Prismatic coefficient, Cp 



(d) Speed-length quotient, T^ = V/ a/L, also de- 

 fined in Appx. 1. 



The parent form used by Taylor is described in 

 Sec. 51.2. The lines and principal features of this 

 form, together with eight curves of section areas 



