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[PSUBS-MAILIST] info please



hello all, can i get some help on a power / speed calculation for a torpedo?
 
is it this formula?
From the wetted surface area you can use the ITTC formula:
cf = 0.075/(logRn - 2)**2
where rf = 0.5 rho v**2 S Cf
if it is can ya tell what abriviations are used in here
or have a simpler one without log rho etc?
 
more info at http://boatdesign.net/forums/showthread.php?s=&threadid=1255&perpage=15&pagenumber=2
 
thanks ahead, yipster