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From: rexford179@cs.com (Lorrin Bird)
Newsgroups: sci.military.moderated
Subject: APDS Shatter Ranges
Date: 1 Nov 2001 16:43:55 -0800
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Xref: spln sci.military.moderated:39982
The British report, EFFECT OF IMPACT AND VELOCITY, listed the results
of APDS testing for shatter velocity, which was found to vary with
angle.
Firing test data at Isigny, France (found on Mycenius site) and in
Thomas Jentz' books for 17 pounder APDS against Panther and Tiger
armor resulted in the following conclusions:
1. tests against Tiger 82mm and 102mm armor exactly followed the
shatter failure limits set in the EFFECT OF IMPACT AND VELOCITY report
2. while the British report predicted that all hits on the 57° Panther
glacis would fail from 150 to 950 meters, 2 of 17 fair hits penetrated
between 200 and 800 yards.
The following ranges represent target range intervals where all 17 pdr
APDS hits are predicted to fail at the given compound angle:
0 degrees.....none
5.............0-200m
10............0-350m
15............150-950m
20............300-1100m
25............500-1300m
30............650-1450m
35............750-1550m
40............800-1600m
45............750-1550m
50............600-1400m
55............300-1100m
60............0-700m
When 17 pounder APDS strikes the Tiger II turret front head-on, the
compound angle is 10° and the hits should penetrate normally beyond
350m. However, if the APDS strikes the turret front at 11° from armor
facing the compound angle is 15° and hits fail from 150 to 950 meters.
When 17 pounder APDS struck the 82mm Tiger side armor at a 50° angle
and 3511 fps, the hit failed. But when the rounds struck 82mm Tiger
armor at the same angle but 3131 fps, it succeeded.
The bottom line is that theory and practice show that APDS had a
tendency to fail against the evry targets is was designed to combat,
Tigers and Panthers and Hetzers (tests which support theory used 67mm
to 102mm armor thicknesses).
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