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Cartridge, 105 mm: APFSDS-T M833
Регіон
Belgium
Категорія
Боєприпаси, ракети та високоточне озброєння
The 105 mm APFSDS-T M833 is a fixed round with the projectile assembly crimped onto an M148A1B1 cartridge case. The projectile assembly consists of a subprojectile and a sabot. The M833 subprojectile consists of a monobloc Depleted Uranium (DU, or staballoy) core acting as the penetrator rod, the front part being sheathed in an aluminium windshield with a steel tip to prevent aerodynamic heating. An aluminium alloy fin assembly is fitted to the rear of the penetrator rod and contains an M13 tracer, which burns for
a minimum of 2.5 seconds, held in place by a threaded plug and disc assembly. The sabot is aluminium and consists of three 120º segments assembled around the subprojectile, it is interfaced with the penetrator body by a series of mating buttress grooves. The sabot differs, as mentioned previously, from earlier designs mainly in the incorporation of gussets in the sabot segments to retain strength and rigidity while reducing weight. A stainless steel bourrelet, containing three shear cuts, is screwed onto the forward face of the sabot. A two-piece nylon obturator and polypropylene seal is assembled around the sabot and a silicone rubber seal is applied over the rear face. The M148A1B1 cartridge case contains approximately 5.8 kg of loosely packed M30 propellant. An M120 electrical primer is fitted to the base; the primer includes a flash tube extending almost to the tail of the projectile assembly. Before loading, the primer is normally protected by a metal clip over the base of the cartridge case. A barrel wear reducing titanium dioxide liner is secured to the interior wall of the cartridge case. Muzzle velocity is 1,494 m/s. No details regarding armour penetration performance have been released. The US Army training round for the M833 is the 105 mm TPDS-T M724A1. The TPDS-T M724A1 is also produced in Belgium by MECAR SA and in Egypt by the Heliopolis Company for Chemical Industries. In the USA the main producer of the TPDS-T M724A1 is General Dynamics, Ordnance and Tactical Systems (GD-OTS). The main details for the TPDS-T M724A1 are round weight, 14.52 kg and round length, 838.2 mm. Muzzle velocity is 1,539 m/s using a single-base propellant. The 105 mm APFSDS-T M833 may be regarded as an improved version of the M774 and, apart from a longer penetrator assembly, differs mainly in the design of the sabot which was redesigned to reduce weight.