rexford Posted January 11, 2001 Share Posted January 11, 2001 U.S. Navy tests on 76mm APCBC suggest following scenario vs. 76mm at 30° from vertical: 1900 fps impact no penetration 2076 fps impact half penetrate 2134 fps impact about 85% penetrate 2148 fps impact half penetrate 2200 fps impact all fail in shatter 2400 fps impact all fail in shatter 2426 fps impact half penetrate shattered 2544 fps impact all penetrate shattered Shatter gap is area where round should penetrate but doesn't, from 2200 to 2400 fps. In general, armor thickness has to be at least 85% of projectile diameter for shatter gap, based on limited test data. If U.S. 75mm follows typical pattern vs 80mm vertical plate, it would penetrate from 750m to 950m using CM data, and fail inside 750m range. Side angles would change effective ranges. Link to comment Share on other sites More sharing options...
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