Some Statistical Properties and Correlations of Dimensional Variations and Inertial Properties of 175mm, M437 Projectiles

摘要

A large number of M437, 175mm, projectiles were extensively measured dimensionally and their inertial properties determined experimentally, in cooperation with Frankford Arsenal and Aberdeen Proving Ground. These shells has been separated into two dimensionally 'acceptable' and three dimensionally 'unacceptable' groups at their production sites. The report presents a statistical evaluation of that data and preliminary attempts at analyzing and correlating the data. The clearest relations found at this preliminary stage of the study are: the 'corkscrew' pattern resulting from the correlation of the azimuthal angle locating the minimum wall thickness with the longitudinal station, and, the correlation of the wall thickness variation in the body/boattail region with the static unbalance. (Author)