22 



u.4 













- 







No. 



Form 

 1(f) 



Prismatic 



Coefficient 







Resistance Coefficient 

 To 





1 

 2 



3 

 4 

 5 

 6 



( 



-« 2 ) 2 



- l.5f Z + 0.5|" 



- «* 



-* 4 



- * 6 

 "* 8 



0.533 

 0.600 

 0.667 

 0.800 

 0.857 

 0.889 



\6% " 32 ^,3 + l6n, 33 

 9fH„ - I2TT) |3 + 4TJJ 33 



43n M 



'6^33 

 367J > 5 5 



64?n 77 





4»? 1| (f/l 



. = 0.1875 



) 









'5\\ \ 



















■_°0.2 







\ 





Curve 7 

 for a dis 



represents 

 tribution 1 



the resisto 

 " £ (sphere 



nee coeffi 

 >id) at f/L 



:ient r Q 

 = 0.1875. 







^2\\ \ 



\ 

















0.1 



ill 



/^ 



l\ 

















III 





V 























4— TOV 

 5 — ^A\ 



6 — W 



!vr2 

 VV3 



6 5 4 













0.500 0.408 



0.316 



Figure 7 - Wave-Resistance Coefficients of Symmetrical 

 Bodies as Defined on Figure 4, f/L =0.25 



the wave resistance of elongated bodies such as torpedoes represents only a 

 small part of the total drag. It has been shown in References 4 and 5 that 

 in the limit of very large Proude numbers the wave resistance becomes pro- 

 portional to the square of the displacement or r to 2 . 



In general, throughout the present report calculations have been 

 extended to F = 1 (y Q = 0.5), and to F = 1 .58 {y Q = 0.2) for the parabolic 

 distributions 1 - f 2 , 1 - | 4 , 1 - £ only. From an approximate investigation 



