Odom Charles T. A drag coefficient Kd based on the 155mm shell HE M101

Memorandum report 1167. — Aberdeen Proving Ground, Maryland: Ballistic research laboratories, 1958. — 11 p.Firing tables for the 155mm howitzer are being revised to reflect the latest changes in table format and in the process will incorporate the most recent information on performance and drag characteristics of the M107 shell. Drag coefficients, Kd, obtained from transonic range measurements of the M101 shell, identical to the M107 shell except for its wider rotating band, were fitted with a series of polynomials. The fitting expressions and a tabulation of the drag coefficients at small intervals of Mach Number are given in this report.
Firing Tables for the 155mm Howitzer are being revised to reflect the latest changes in the format of artillery firing tables. In the process of revising existing firing tables the practice in BRL has been to incorporate into the revision the latest and best information available on the shell. More recently active efforts have been made to employ in the ballistic computations of any firing table the drag function of the particular shell in question.
There were available from transonic range firings, measurements of the zero yaw drag coefficient of the 155mm Shell, HE, M101. The M101 shell is the standard HE shell for the 155mm gun and except for its wider rotating band, which has a small effect on the drag of the projectile, it is otherwise identical to the Ml07 shell which is the standard HE shell for the 155mm howitzer.Shell 155mm HE M101 with fuze.
Table of the drag coefficient Kd based on the 155mm shell HE M101.