Determination of Aerodynamic Drag and Exterior Ballistic Trajectory Simulation for the 155mm, DPICM (Dual Purpose Improved Conventional Munitions), M864 Base-Burn Projectile

摘要

HAWK Doppler radar data collected at Yuma Proving Ground, Az, for the 155mm, DPICM, M864 base-burn projectile have been reduced for the purpose of determining the aerodynamic drag. The estimated base drag reduction during base-burn motor functioning showed a very good correlation with time of flight and to a lesser degree with local atmospheric air pressure. No correlation was evident with flight Mach number, provided an effective base drag coefficient is assumed which is just a function of Mach number. This result suggests a simple addition to the Modified Point Mass Trajectory Model for the exterior ballistic simulation of the M864 base-burn projectile. Keywords: Projectile trajectories; DPICM (Dual-purpose Improved Conventional Munitions); Propelling charges; Ballistic trajectory modeling. (edc)