other five designs, both in t.r.h.p.* and propulsive coefficients when self-propelled." In 

 Professor Baler's opinion, "the parent form finally adopted by the panel for the 0.80 block 

 was a suitable and wise decision." 



As in the case of the lower limit of the series being taken as 0.60 block coefficient, 

 this idea that the 0.80 block model could be treated as an end point seemed a good one at 

 the time, but events have already overtaken the program in this respect also. Just as single- 

 screw ships are now being built with block coefficients well below 0.60, so in the range of 

 supertankers and bulk carriers, designs in the neighborhood of 0.80 to 0.85 block coefficient 

 have become of great importance. There is therefore a good practical case for extending the 

 series at both ends. 



In the light of the above survey, the members of the Panel came to the conclusion 

 that the new contours of Series 60 formed a suitable basis for use in defining parent models 

 for a systematic investigation of resistance and propulsive qualities, and it was then 

 possible to proceed to the next phases. 



♦tr.h.p = towrope horsepower or ehp 



V-23 



