Development Program for 30mm Aluminum Alloy Cartridge Case for Close-Air-Support Gun System

Abstract

The report presents the development of a 30mm aluminum alloy cartridge case in support of the Close-Air-Support Gun System Program. The case was designed and developed to utilize a special cartridge case alloy fabricated by the impact extrusion process. A total of 112 cases were successfully test- fired. Eighty-one used the M36A1E1 primer with ignition booster; thirty-one used the XM115 primer without booster. The M36A1E1 primer produced a barrel action time of 9.9 msec, and the XM115 primer produced a barrel action time averaging 125.0 msec. Propellant CIL 1379C produced the most satisfactory ballistic function with the lowest chamber pressure. A contractor-developed projectile crimp sustained a bullet-pull of 1000 pounds (minimum) and did not cause mouth erosion.

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Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1971
Accession Number
AD0889230

Entities

People

  • Harry F. Boekhoff

Tags

DTIC Thesaurus Topics

  • Air Force
  • Aluminum
  • Aluminum Alloys
  • Cartridge Cases
  • Combustion
  • Contractors
  • Extrusion
  • Fabrication
  • Gunpowder
  • Ignition
  • Manufacturing
  • Materials
  • Projectiles
  • Propellants
  • Propelling Charges
  • Tactical Air Support
  • Test And Evaluation

Readers

  • Software Engineering
  • ballistics.