Table 7 - Table of Offsets-Parent Forms-0.80 Block Coefficient 



(Half-breadths of waterlines given as fraction of maximum beam on each waterline) 



Model =- 4214W-B4 



W.L. 1 . 00 is the designed load waterline 



Forebody prismatic coefficient — 0.861 

 Afterbody prismatic coefficient = 0.750 

 Total prismatic coefficient = . 805 





















Area as 

 fraction of 













Waterlines- 









max. area 



Sta. 



Tan. 



0.075 



0.25 



0.50 



0.75 



1.00 



1.25 



1.50 



to 1.00 W.L. 



FP 



0.000 



0.000 



0.000 



0.000 



0.000 



0.000 



0.044 



0.098 



0.000 



1 



0.053 



0.162 



0.235 



0.258 



0.267 



0.286 



0.318 



0.378 



0.243 



0.160 



0.324 



0.435 



0.486 



0.505 



0.522 



0.554 



0.613 



0.458 



IJ^ 



0.286 



0.467 



0.581 



0.650 



0.681 



0.700 



0.728 



0.779 



0.620 



2 



0.423 



0.591 



0.702 



0.774 



0.808 



0.830 



0.852 



0.890 



0.746 



3 



0.696 



0.793 



0.867 



0.921 



0.948 



0.964 



0.975 



0.984 



0.901 



4 



0.903 



0.929 



0.962 



0.983 



0.994 



0.999 



1.000 



1.000 



0.975 



5 



0.990 



0.991 



0.995 



0.998 



1.000 



1.000 



1.000 



1.000 



0.997 



6 



1.000 



1.000 



1.000 



1.000 



1.000 



1.000 



1.000 



1.000 



1.000 



7 



1.000 



1.000 



1.000 



1.000 



1.000 



1.000 



1.000 



1.000 



1.000 



8 



1.000 



1.000 



1.000 



1.000 



1.000 



1.000 



1.000 



1.000 



1.000 



9 



1.000 



1.000 



1.000 



1.000 



1.000 



1.000 



1.000 



1.000 



1.000 



10 



1.000 



1.000 



1.000 



1.000 



1.000 



1.000 



1.000 



1.000 



1.000 



11 



1.000 



1.000 



1.000 



1.000 



1.000 



1.000 



1.000 



1.000 



1.000 



12 



0.996 



0.997 



1.000 



1.000 



1.000 



1.000 



1.000 



1.000 



0.999 



13 



0.958 



0.976 



0.996 



1.000 



1.000 



1.000 



1.000 



1.000 



0.995 



14 



0.858 



0.906 



0.958 



0.991 



1.000 



1.000 



1.000 



1.000 



0.974 



15 



0.686 



0.780 



0.872 



0.941 



0.972 



0.988 



0.996 



1.000 



0.915 



16 



0.486 



0.625 



0.726 



0.831 



0.900 



0.941 



0.969 



0.991 



0.806 



17 



0.302 



0.442 



0.542 



0.656 



0.765 



0.851 



0.915 



0.964 



0.649 



18 



0.146 



0.266 



0.337 



0.427 



0.560 



0.712 



0.832 



0.896 



0.449 



\9M 



0.092 



0.185 



0.232 



0.298 



0.425 



0.617 



0.764 



0.840 



0.336 



19 



0.045 



0.105 



0.130 



0.166 



0.263 



0.503 



0.670 



0.760 



0.212 



191^ 



0.013 



0.026 



0.032 



0.035 



0,071 



0.353 



0.546 



0.644 



0.079 



AP 



0.000 



0.000 



0.000 



0.000 



0.000 



0.160 



0.370 



0.476 



0.100 



Max. half beam 



0.850 



0.970 



1.000 



1.000 



1.000 



1.000 



1.000 



1.000 





C 7" — 



The symbols are defined as follows 



where R is the ship resistance in pounds, 

 p is the mass density of water in 



Ib/cu ft 



S is the wetted surface in square feet, 



V is the speed of ship in feet per second, 



V is the speed of ship in knots, and 



Ljj,^ is the length of ship on designed load waterline in feet. 



The results are also shown in Figure 19 as curves of (c) to a base of @ . These 

 two "constants," introduced by Froude, are nondimensional, involve only speed and displace- 

 ment (the two factors which usually control the preliminary design of a merchant ship), and are 

 very useful in comparing forms at this stage. They have been used also in the SNAME Model 

 Resistance Data sheets. 



In English units they are defined as 



® = 0.5834 • 



V-10 



