Subsonic base drag of cylindrical bodies with conical boat-tails.
Abstract:ESDU 76033 gives curves derived by correlating experimental data from a number of different sources enabling the base drag coefficient, based on body maximum cross-sectional area, to be predicted to within 0.025. Two-sets of curves are given, one for boat-tail angles below 16 deg and one for angles exceeding 16 deg; the drag depends on the ratio of base to maximum diameter, and boat-tail angle. The data were found to be independent of Mach number below 0.8 and it proved impossible to isolate any Reynolds number effects.
|Data Item ESDU 76033|
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|Figure 1||Base drag coefficient for 3° =< β =< 14°|
|Figure 2||Base drag coefficient for β >= 16°|