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Because of this, the Army started the Accelerated Precision Mortar Initiative (APMI) from an urgent operational needs statement in February 2009 [citation needed] to create a GPS-guided 120 mm mortar with accuracy of 5 m (16 ft) CEP at 7,000 m (4.3 mi); because APMI was an urgent request, it was accelerated by an Other Transaction Authority ...
Repointing is the process of renewing the pointing, which is the external part of mortar joints, in masonry construction. Over time, weathering and decay cause voids in the joints between masonry units, usually in bricks , allowing the undesirable entrance of water.
2S12 is in fact the designator for the combination of the 2B11 "Sani" heavy mortar with its transport vehicle 2F510, a GAZ-66-15 4×4 truck. The 2B11 weighs nearly 200 kg (500 lb) when fully assembled, and thus must be mounted to the 2×1 wheeled chassis 2L81 and towed to the emplacement site by the truck. The GAZ-66 prime mover also transports ...
It can use the same pointing optics as the MO-120-RT-61. [3] The LLR 81mm can be parachuted either piece by piece, in a kit comprising a dismantled weapon and ammunition, or in larger crates comprising several weapons. The barrel was reinforced so as to allow firing of all existing 81 mm mortar ammunition. [3]
Tuckpointing was a way of achieving a similar effect using cheap, unrubbed bricks; these were laid in a mortar of a matching colour (initially red, but later, blue-black bricks and mortar were occasionally used) and a fine fillet of white material, usually pipe clay or putty, pushed into the joints before the mortar set. [4]
Like its predecessors (2S9 and 2S31), it is a hybrid of a howitzer and a mortar that lacks a direct NATO counterpart. The gun can deliver both direct and indirect fire. It can fire special 120 mm rifled rounds, developed for Russian mortar systems, such as the previous 2S9 Nona-S, and any 120 mm mortar bombs. [6]
The range of a mortar is controlled by the number of propellant charges attached to the tail of the mortar designated M223. A charge is a semi-circular donut of nitrocellulose, which resembles a "horseshoe". [17] [18] A round for the M252 mortar comes with four charges attached. Longer-range shots require more propellant than can fit in the ...
The AMOS (Advanced Mortar System) is an example of an even more advanced gun mortar system. It uses a 120 mm automatic twin-barrelled, breech-loaded mortar turret, which can be mounted on a variety of armoured vehicles and attack boats. A modern example of a gun-mortar is the 2B9 Vasilek.