British Armour Specifications and Penetration Critiera |
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Written by David Boyd
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Thursday, 01 January 2009 21:19 |
British Armour Specifications / Penetration Criteria Plate Specifications Code | Type | I.T.60 | Thin face hardened plate | I.T.70 | Homogeneous hard plates 3 to 14mm thick | I.T.80 | Machineable quality plates 15mm thick and over | I.T.90 | Cast armour | I.T.100 | Machineable quality plates 3 to 14mm thick | I.T.110 | Heat-treated Carbon Manganese steel | Penetration Codes Code | Result | A | Slight or no impression | B | Deep impression | C | Deep impression and bulge at back | D | Deep impression and bulge at back and crack | E | Deep impression with flak off the back of the plate, or bulge and crack | P | Pinhole penetration | R | Penetration, core not clean through the plate | W | Penetration, core clean through | L | Indicates core lodged in plate i.e. P(L) | Penetration Criteria Ballistic limit - the striking velocity at which there is a 50% chance of getting daylight through the plate or of metal being thrown from the back of the plate. Immunity level - highest velocity which would give only a smooth bulge on the back of the plate W/R Limit - the striking velocity at which half give "W" and half "R" or less. O.B. Critical Velocity - 50% of shot is expected to be partial or full penetrations Sources - AVIA 46 118
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Last Updated on Thursday, 01 January 2009 21:21 |