It was shown rather conclusively in reference 2 that , for a given Mach Number M, taper ratio X, and span-to-body-diameter ratio b/D, CNTU is a function of / only, independent of the number of fins. The purpose of the present note is to point out that this correlation can be made independent of Mach Number also, by the simple expedient of plotting j3CNTa versus I. The result of applying this procedure to the clipped-delta-fin data of reference 2 is shown in Fig. 1. I t is seen that excellent correlation is achieved. Figs. 2 and 3 show a somewhat poorer correlation for the rectangular-fin data of references 3-5, but it is felt that even this is sufficiently good to indicate that supersonic multifin normal-force data can be estimated with reasonable accuracy from cruciform-fin data at the same values of X and b/D.