Primex Technologies, Inc.

Donald R Osment

William Brian Stewart

John W Duchek

W Brian Stewart

The present invention is directed to a pre-molded aft seal for an armor piercing fin stabilized discarding sabot (APFSDS) projectile, comprising a plastic sleeve made from a material selected from the group consisting of thermoplastic polyurethane and thermoplastic polyester elastomer, and effective to seal an APFSDS projectile from combustion products, the plastic aft sleeve further comprising an outwardly flanged first portion having a radius of curvature of from about 0.1 to 5 inches; a constantly decreasing diameter second portion; and an inwardly flanged substantially conical third portion connected to the second portion by a curved portion having a radius of curvature of from about 0 to 0.25 inch.

Pre-molded AFT seal for discarding sabot projectiles

The invention is directed to a sabot having a longitudinal axis and comprising a plurality of sabot segments. Each of the sabot segments comprises a repeating structure of: (a) a plurality of plies of a first fibrous material oriented radially from the longitudinal axis, wherein each fiber of the first fibrous material is oriented substantially parallel to the longitudinal axis; and (b) a plurality of plies of a second fibrous material, wherein each fiber of the second fibrous material is oriented nonparallel to the longitudinal axis and substantially parallel to every other fiber of the second fibrous material. The total number of plies in each repeating structure is at least five (5). The invention is also directed to an APFSDS kinetic energy tank projectile that utilizes the above-described sabot.

Composite ply architecture for sabots

An armor piercing fin stabilized discarding sabot kinetic energy projectile includes a pre-molded plastic aft seal sleeve to protect the sabot from damage from the propellant and replaces both the RTV and the protective sheath of conventional designs. The seal is manufactured from thermoplastic polyurethane or thermoplastic polyester elastomer.

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East Petersburg, PA, United States of America

Donald R Osment