Identification of Certain Shrapnel’s Air Resistance Coefficient in Plateau Environment Based on CK Method

Abstract

A calculation program of projectile PRC (Plateau Resistance Coefficient) identification was wrote under Matlab platform based on CK (Chapman-Kirk) method of aerodynamic force parameter identification and shooting range test data of a certain type of shrapnel in this paper. And the difference of resistance coefficient between plateau and plain was analyzed, which showed clearly that, the former was 10–40% less than the latter. The reducing of the PRC would bring 4.24–5.93% farther more range to the field of fire. It was consistent with the plateau test results. It indicated that the change of the PRC and its effect must be considered and calculated particularly when deciding plateau shooting table of the certain type of shrapnel, studying of projectile plateau ballistic characteristics, or designing the plateau module of the artillery information system.