ONE OF THE INTERESTING characteristics of the complete ballistic cycle, executed in the interval between the initial motion of the projectile from the seated position in the bore and the final, abrupt dissipation of its energy in the target, and the characteristic which limits experimental development most severely, is the brief duration of some of its elements, in several of which the factors to be measured are of very great intensity. It has been pointed out that a considerable part of the more effective analytic procedure of ballistic engineering practice is, in nature, purely empirical summary.1 In order that such generalizations may be satisfactorily free from spurious characteristics, it is necessary to establish carefully the quantitative basis for experiment, particularly in the study of the gun cycle itself and of penetration ballistics.
1L. Thompson, “Ballistic Engineering Problems: Empirical Summaries,” U.S. Naval Institute PROCEEDINGS, vol. 56, p. 411, May, 1930.