Resistance of Unsized 19-Ounce Nylon Duck to Perforation by Fragment-Simulating Projectiles
WATERTOWN ARSENAL LABS MA
Pagination or Media Count:
In comparison with samples of sized 17.5-ounce nylon duck previously tested here, the resistance of an equivalent weight of the subject material was slightly inferior. Thus the resistance engendered by the use of a sizing agent appears to more than compensate for the resultant increase in weight. Samples of this material were cut into pieces 12-in x 12-in, stretched taut, and attached rigidly to a wooden frame which impacts of cal .45 steel-jacketed ball projectiles and cal .22 fragment-stimulating projectiles, G-2, were directed. The results of these tests appear in Table 1 in which they have been compared with the results of earlier tests on sized 17.5-ounce nylon duck. The addition of a sizing agent to the 17.5-ounce nylon duck increased its weight-per-unit-area so that the weight of a given number of plies in the range investigated was about equal to that of an assembly of unsized 19-ounce duck using one ply less. Nevertheless, it is apparent from the test results that the rigidity engendered by the use of the sizing agent caused an increase in the materials resistance which more than compensated for the increase in weight. In general, the addition of the sizing agent was more than equivalent in added resistance to the addition of an extra ply of the basic material.