ENGINEERING FOR PRODUCTION OF CARTRIDGE, 20MM, HPT, M54E2
LAKE CITY ARSENAL INDEPENDENCE MO
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Feeding and ramming difficulties during short burst automatic fire with the cartridge, 20mm, HPT, M54 were traced to the external configuration of the projectile nose, a redesign being indicated. The T46 and T51 projectiles were developed which proved to be satisfactory in limited tests. The T46 closely followed standard M55 Projectile design, but the T51 was completely unconventional, being of one-piece construction and having a distinctive dumbbell shape. A cost study indicated the T51 design to be the more economical to manufacture and its unusual shape made it inherently identifiable. The one- piece construction also eliminated nose assembly difficulties and security problems during feeding and ramming. Minor design and dimensional changes were made to the T51 projectile to promote volume production, and it was designated the M54E2. It is recommended that the cartridge, 20mm, HPT, M54E2 be standardized as the cartridge, 20mm, HPT, M54A1 for procurement where high pressure test ammunition is required for use in 20mm aircraft weapons.
- Ammunition and Explosives