Accession Number : ADA954820

Title :   Comparative Resistance of Various Components of Experimental Helmet T21E1.

Descriptive Note : Memorandum rept.,

Corporate Author : WATERTOWN ARSENAL LABS MA

Personal Author(s) : Sullivan,J. F.

Report Date : 29 NOV 1945

Pagination or Media Count : 9

Abstract : Ballistic tests have recently been conducted at this laboratory on various components of the experimental helmet, T21E1. On the basis of these tests a three-ply nylon inner component is to be preferred over a three-ply fiberglass inner component, and a 24ST duralumin outer component (of average gauge = .109 ) is to be preferred over a 75ST duralumin outer component (of average gauge = .097 ). However, while the superiority of the nylon component over the fiberglass component appears to be independent of weight (although perhaps a result of thickness), the superiority of the 24ST component over the 75ST component seems directly attributable to the weight (thickness) difference. Thus, as regards resistance to cal .22 fragment simulating projectiles, equivalent weights (thicknesses) of 24ST and 75ST duralumin could be expected to perform equivalently, whereas equivalent weights of the nylon and fiberglass laminated components have demonstrated the superiority of the nylon laminate.

Descriptors :   BALLISTICS, EXTERNAL, FIBERGLASS, HELMETS, LAMINATES, NYLON, PARTS, PROJECTILES, TEST METHODS, THICKNESS, WEIGHT

Subject Categories : Laminates and Composite Materials
      Protective Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE