Accession Number : AD0919762

Title :   Development of a 20mm Plastic Frangible Projectile.

Descriptive Note : Final rept. May-Dec 73,

Corporate Author : AAI CORP COCKEYSVILLE MD

Personal Author(s) : Stastny, Theodore G., Sr. ; Rottenberg, Mark M.

Report Date : FEB 1974

Pagination or Media Count : 59

Abstract : This report describes a program to develop, fabricate, test, and subsequently deliver a quantity of 20mm plastic frangible projectiles designed to replace current monolithic all-metal target practice projectiles. The projectile comprises a stack of steel wafers excapsulated within a plastic shell and is designed to disintegrate upon target impact. Presented in the report are the fabrication and test of several different projectile configurations, the design and fabrication of an automatic nose and body mold, and the delivery of 900 assembled cartridges and 100 projectiles. At the completion of the program the projectile evolved is capable of being fired from a standard 20mm Mann barrel at standard muzzle velocities (on the order of 3300 fps). In all cases the projectiles break up on impact. (Author, modified-PL)

Descriptors :   (*PROJECTILES, FRANGIBLE), (*TRAINING AMMUNITION, GLASS REINFORCED PLASTICS), ROTATING BANDS, WEAR, TERMINAL BALLISTICS, RICOCHET, REDUCTION, NYLON, MOLDING TECHNIQUES, ULTRASONIC WELDING, PROTOTYPES, MANUFACTURING, FIRING TESTS(ORDNANCE), YAW, PROPELLING CHARGES, PROJECTILE TRAJECTORIES, INTERIOR BALLISTICS, MUZZLE VELOCITY, SPIN STABILIZED AMMUNITION, METAL PLATES, STEEL, AIRCRAFT AMMUNITION, AIRCRAFT GUNS, COMPATIBILITY, COST EFFECTIVENESS.

Subject Categories : Laminates and Composite Materials
      Fabrication Metallurgy
      Plastics
      Ammunition and Explosives
      Ballistics

Distribution Statement : APPROVED FOR PUBLIC RELEASE