HARINSR WITHOUT BULB 



Xio — 



iODBL 4440 «)- 



ESTIMATE COMPUTED FROM 



Rr/A COBTOnRS 



WITHODT LCB CORHBCTIOH 



WITH LCB CORRECTIOH 



z 



1$000 

 14000 



13000 



12000 

 11000 

 10000 

 9000 



sooog 

 7000 1 



X 



6000 

 5000 

 4000 



3000 



2000 

 1000 



8 9 10 U 12 13 14 15 16 17 18 19 2a, 

 SPEED IN KNOTS 



Figure 91 — Comparison of FMP obtained by testing a Model having 



Proportions of MARINER Class, but without Bulbous Bow, with 



Corresponding Estimate from Series 60 Contours 



Figure 92 shows the predicted ehp for an ocean-going ore carrier of 0.78 Cg compared with 

 actual model test results; the estimate was made as outlined above, using the PENNSYL- 

 VANIA as the "basic" ship. 



Even more extreme uses can be made of the Series with some success, as shown by 

 Professor Baier's adoption of the series bow and stern lines with parallel body in the design 

 of lake ships (page V-22). The demonstration of the qualitative uses of Series 60 is easy, 

 but the establishment of their absolute quantitative value is more difficult. In discussing 

 the very first paper in the series (Reference 44), Mr. V. L. Russo made the following obser- 

 vations: "The real value of the contours proposed in the paper could be established best by 

 determining what results these contours would give by comparison with acceptable results 

 exemplified not by the standard of a phantom form but by actual successful ship designs , . . 

 This way of comparison . . . would have the advantage of being conclusive as it would 

 furnish a true comparison under practical conditions and be devoid of imponderable 



XII-9 



