DTIC ADA162133: Aerodynamic and Flight Dynamic Characteristics pdf

DTIC ADA162133: Aerodynamic and Flight Dynamic Characteristics

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Free flight spark photography range tests, Mann barel accuracy tests, and long-range limit-cycle yaw tests were conducted with the U.S. M855/M856 ammunitions, and the Belgian (FNB) SS-109/L110 ammunition. Tolerances in bullet jacket wall thickness and bullet seating alignment were identified as contributing to the dispersion problem in U.S. ammunition. The aerodynamic characteristics of the four projectiles were determined, and the gyroscopic stability was found to be sufficient. All four projectiles are dynamically stabel at supersonic speeds. The M855-SS-109 projectiles show limit-cycle yaw levels growing to approximately six degrees at 800 metres range. Originator- supplied keywords: 5.56mm NATO Ammunition, Aerodynamic characteristicsd, Aerodynamic drag, Gyroscopic stability, Dynamic stability, Yaw limit-cycle, Accuracy

• Creator/s: Defense Technical Information Center
• Date: 10/1/1985
• Year: 1985
• Book Topics/Themes: DTIC Archive, McCoy, Robert L., ARMY BALLISTIC RESEARCH LAB ABERDEEN PROVING GROUND MD, *PROJECTILES, THICKNESS, STABILITY, SMALL ARMS AMMUNITION, DYNAMICS, TEST METHODS, ACCURACY, ALIGNMENT, FLIGHT, AERODYNAMIC CHARACTERISTICS, AMMUNITION, AERODYNAMIC DRAG, WALLS, SUPERSONIC CHARACTERISTICS, JACKETS, SEATS

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