L R 

 The models usod in the — , — series had, for any given block coefficient, a fixed 



position of LCB, determined from the earlier series of models in which the LCB position was 

 varied. In makinfj an estimate of power for a new ship using the Series 60 resistance con- 

 tours, the result will apply to a ship having the LCB in the position chosen for the parent 

 series. If for one reason or another, the new design must have the LCB in some other fore 

 and aft position, then a correction must be made for this difference. If it is assumed that 



L R 



the effect of movement of LCB on the parent model of given C n and values of — and — 



L R ^ /' 



applies also to a model of the same C^ but different values of — and — , appropriate to 



R H 



the design in question, then the correction can be made from the data given in Chapter VI of 



this report; see Tables 49—53. 



In applying results of the kind given in this report, there are often a number of points 



which at first are somewhat obscure to the new user and may create difficulties or even 



errors in making estimates. For this reason, a numerical example has been worked in some 



detail in Appendix D in the hope that it will obviate any such problems arising in the present 



work. 



Figures Bl through B39 

 Contours of Residuary Resistance in Pounds per Ton of Displacement 



B-3 



