Table 1

Back face signature (BFS) data (n=10 shots for each impact angle and air-gap combination)

Air-gap (mm)
Shot no051015
0° impact angle
 129383931
 235343432
 333405036
 433324226
 539Perforation4040
 635343358
 73737PerforationPerforation
 855344042
 934353732
 1033354826
30° impact angle
 125324931
 231222224
 341Perforation31100
 4PerforationPerforation3328
 5Perforation45PerforationPerforation
 6282442Perforation
 726PerforationPerforationPerforation
 8Perforation32PerforationPerforation
 9PerforationPerforation3642
 1032PerforationPerforationPerforation