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Digital Object Identifier 10.32754/JMT.2020.2.06 37 1 Abstract—The present study is based on calculation of drag shape index and drag coefficient for three different geometrical configurationsfor a ballistic cap intended to be mounted over a 30 mm AP-T Naval projectile. The calculations are made in PROTech numerical application under the influence of three laws of resistance (Law 1930, Law 1943 and Siacci’s Law) for Mach number values which vary from 0.1 to 4, with the main purpose of choosing the best geometrical shape from the proposed forms of ballistic caps.

Theoretical Evaluation of Drag Coefficient for Different Geometric Configurations of Ballistic Caps for an Experimental 30×165 mm AP-T Projectile