25MM Plastic Telescoped Cartridge Case Development Program

Abstract

This study concludes that: (1) The feasibility of a plastic cartridge case utilizing molded propellants and a telescoped projectile has been demonstrated successfully at ambient conditions and at -65 F; (2) Experimental investigations have shown that the cartridge case will withstand peak chamber pressures greater than 100,000 psi and extract from the gun chamber without difficulty; (3) The feasibility of an all plastic primer has been demonstrated; (4) The chamber seal has been observed to have a significant effect on ballistic performance and a compatible plastic seal has been demonstrated successfully at peak chamber pressures up to 80,000 psi; (5) The manufacturing feasibility of a zero draft, injection molded case has been demonstrated; (6) The plastic case provides the potential to minimize the ballistic performance deficiencies of the GAU-7/A program; (7) The feasibility of a push-through or push-out cartridge case ejection was demonstrated in a single shot fixture; and (8) The cartridge case and seal materials that were demonstrated to be most compatible to the ballistic environment were Huels 38% glass filled nylon 12 and DuPont Zytel 151 (nylon 6/6).

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1975
Accession Number
ADB006866

Entities

Organizations

  • Brunswick Corporation

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • Cartridge Cases
  • Combustion
  • Environment
  • Failure Mode And Effect Analysis
  • Glass Transition Temperature
  • Gunpowder
  • High Pressure
  • Low Temperature
  • Materials Laboratories
  • Materials Processing
  • Mechanical Properties
  • Muzzle Velocity
  • Plastics
  • Propellants
  • Tensile Strength
  • Test And Evaluation

Readers

  • Munitions and Ordnance Engineering
  • Polymer Science and Engineering.
  • Reinforced Composite Materials

Technology Areas

  • Space
  • Space - Hall-Effect Thruster