Preliminary Erosion Analysis for the Experimental M829E3 Kinetic Energy Round
ARMY ARMAMENT RESEARCH DEVELOPMENT AND ENGINEERING CENTER WATERVLIET NY BENET LABS
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The preliminary experimental 120-mm M829E3 kinetic energy round data described here represent a stage in the development cycle that occurred about a half year to a year ago. The computational erosion predictions are guided and supported by substantial field and laboratory data, including data from firing tests, laboratory tests, and nondestructivedestructive cannon erosion characterizations. This information is intended to provide a snapshot of development for that period, and is not directly related to the future type-classified M829E3 kinetic energy round. During that period, these modeling predictions put the program about 40 rounds shy of its required 180-round minimum program target, so further round optimization will likely contribute to the achievement of this goal. Further round optimizations will likely include changes in the weight and configuration of the propellant, projectile, case, and possible ablative. Results of this erosion analysis, erosion effective full charge factor analysis, and comparisons to the rounds advanced type-classified counterpart are provided for the preliminary experimental M829E3 kinetic energy round used in the 120-mm M256 cannon at multiple round-conditioning temperatures. The computational method consisted of using our Unified Cannon Erosion Code. Differences exist between the preliminary experimental M829E3 kinetic energy round and its advanced type-classified counterpart including increased propellant weight, increased projectile weight, and RPD380 propellant instead of JA2 propellant. The preliminary experimental M829E3 kinetic energy round erosion analysis achieves erosion condemnation in a lesser number of rounds, and the worst eroded region has moved slightly more than a half meter up-bore compared to its advanced type-classified counterpart.