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Cartridge, 40 mm: L/70 AP-T
Регіон
Brazil
Italy
France
Категорія
Боєприпаси, ракети та високоточне озброєння
The 40 mm L/70 AP-T is a fixed round with the projectile crimped rigidly to the brass cartridge case by two 360º crimping bands. A copper drive band encircles the projectile just above the cartridge case/projectile junction. The Bofors 40 mm L/70 AP-T projectile has a forged hardened steel penetrator body with the nose cap of cold-rolled steel covered by a thin steel windshield crimped onto the penetrator body. The base of the projectile is machined to accept a tracer element which burns for at least 4 seconds
after firing. The drawn 70:30 brass cartridge case has a semi-rimmed base and is fitted with a percussion primer with a sinoxide detonator. Propellant loads vary from manufacturer to manufacturer but the usual load is approximately 480 to 485 g of a flash-reduced, single-base nitrocellulose powder (NC 1066), producing a muzzle velocity of 1,025 m/s. The 40 mm L/70 AP-T can penetrate from 40 to 50 mm of armour plate set at an angle of 60º at a range of 100 to 150 m. The 40 mm L/70 AP-T is no longer available from Bofors AB as it considers developments such as the 40 mm L/70 MPT rounds (qv) are now more effective for the attack of armoured targets. However, several other manufacturers continue to offer 40 mm L/70 AP-T which may be regarded as an upgraded version of the 40 mm L/60 AP-T. At one time Bofors also produced an L/70 APC-T with a small amount of explosive inside a recess in the base. This round is no longer available. Applications include all 40 mm L/70 Bofors Guns including: 40 mm L/70 BOFI; TRINITY; SAK 40 L/70 ; L/70 Combat Vehicle Gun (40/70 B); Otobreda Twin 40L70 Field Mounting ; Otobreda Twin 40L70 Compact naval mounting; Otobreda Twin Fast Forty naval mounting; Boeing Company Bushmaster IV. TRIDON 40 mm L/70 self-propelled air defence gun.