SPEED IK KNOTS 



Figure 88 - Comparison of EHP obtained by testing a Model having 

 Series 60 Lines and Proportions of SS PENNSYLVANIA with 

 Corresponding Estimate from Series 60 Contours 



Chapter VII, shows excellent agreement with the ehp measured on the model. Thus when 

 allowance is made for differences in LCB position, the ehp estimated from the contours is 

 in very good agreement with that measured on these three models. This fact should give 

 confidence in the use of the contours throughout the range, for of course the results of the 

 tests on these three Series 60 equivalent models were not used in any way in the process of 

 deriving contours. 



Self-propulsion tests were also carried out on the Series 6 equivalents of the 

 SCHUYLER OTIS BLAND and the PENNSYLVANIA. The values of w, t, and e^^ measured 

 in the tests are compared in Figures 89 and 90 with the corresponding values estimated from 

 the appropriate contours, and the agreement is again very satisfactory. 



Although estimates of power made from the contours apply strictly only to ships having 

 lines derived from the Series 60 charts, they can, with proper exercise of caution, be used as 

 guides over a somewhat wider field. For example, in developing the original Series 60 lines, 

 Bethlehem Steel Company provided a set of lines equivalent to the MARINER class of fast 



XII-7 



