Free Flight Range Tests of a High Density Armor Piercing Flechette Utilizing Yaw cards

Aerodynamic stability and drag data were obtained from yaw card tests of the high density armor piercing flechette. The test items encased in aluminum sabots, were launched from a 30mm smooth bore powder gun. The sabot petals were deflected by a steel cone, 22 feet from the muzzle smooth bore powder...

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Bibliographische Detailangaben
Hauptverfasser:	Mayer, Paul C, Winchenbach, G. L
Format:	Report
Sprache:	eng
Schlagworte:	30-mm guns AERODYNAMIC DRAG AERODYNAMIC STABILITY ALUMINUM Ammunition and Explosives ANTITANK WEAPONS ARMOR PIERCING AMMUNITION Ballistics CARDS CHRONOMETERS DATA REDUCTION Discarding sabot projectiles EXTERIOR BALLISTICS FIN STABILIZED AMMUNITION FIRING TESTS(ORDNANCE) FLECHETTES Fluid Mechanics FREE FLIGHT MODELS FREE FLIGHT TRAJECTORIES GUN LAUNCHERS HDAP(High density armor piercing) HIGH DENSITY High density armor piercing projectiles LOW COSTS SABOT PROJECTILES SABOTS SEPARATION SPINNING(MOTION) STATIC STABILITY SUPERSONIC CHARACTERISTICS TEST EQUIPMENT Witness cards YAW Yaw cards
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Beschreibung
Zusammenfassung:	Aerodynamic stability and drag data were obtained from yaw card tests of the high density armor piercing flechette. The test items encased in aluminum sabots, were launched from a 30mm smooth bore powder gun. The sabot petals were deflected by a steel cone, 22 feet from the muzzle smooth bore powder gun. The test item then proceeded through the instrumented portion of the range, passing through 20 yaw cards spaced approximately 10 feet apart. Six velocity measurements were obtained when the projectile punched holes in 12 sheets of circuit paper; one sheet started a chronograph and the second sheet stopped the chronograph. Aerodynamic stability data were obtained by analyzing successive holes cut in the yaw cards by the projectile. The drag data were derived from the measured reduction in velocity as the projectile traversed the range. The tests were conducted over a Mach number range of 1.25 to 2.25.