Leopard 2 of the Swiss Army fitted with the Swiss desianed and built 140 mm smoothbore gun which is fitted with a fume extractor and a slotted muzzle brake.
First ballistic verification of the Swiss 140mm smoothbore gun under live conditions took place in the Summer of 1988 with the first projectiles being fired from the weapon installed in a Leopard 2 MBT taking place in the Autumn of 1989.
To ease handling, the ammunition is in two parts. The main propellant charge has a steel bottom and a combustible container with about 10 kg of propellant, and one part with either a KE projectile plus an additional 5 kg of propellant or a Multipurpose (MP) round which would probably not require the additional charge. The propellant will be optimised for the KE projectiles.
The KE projectile has a long rod penetrator of conventional material, not depleted uranium as used in US projectiles of this type, and a sabot with a plastic driving band.
Trials so far have shown that both types of ammunition will penetrate around 1,000 mm of steel armour, which is a significant increase in penetration over current in-service 120 mm projectiles.
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Liquid Propellant Advantages over Conventional Propellants:
Martin Marietta Defense Systems is also exploring LP for the US Navy's Gun Weapon System Warships programme under a contract awarded by the Naval Surface Warfare Center's Crane Division.
The first phase of the Navy programme, the company will apply the technology and hardware of the 155 mm LP gun it is already developing for the US Army Crusader, although the naval weapon will have an expanded performance.
As a result of the first phase, the United States Navy has awarded Martin Marietta a Second Phase full performance, single shot demonstrator that will be capable of launching new precision guided munitions to a range of over 100 km.
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United Defense Armored Gun System chassis with 105 mm turret replaced by new turret with two six round packs of LOSAT
Artist's impression of a Loral Vought Systems LOSAT system mounted on a modified Bradley chassis launching an HVM
The US Army envisages a potential use on M2/M3 Bradley vehicles whilst the US Marine Corps is interested in equipping its 8 x 8 LAVs.
Another US Army interest is in the future three-man crewed Line Of Sight Anti-Tank (LOSAT) Vehicle based on Bradley IFV components. This has an elevatable four-round launcher assembly with a further 20 missiles stored within the vehicle body.
Missile launch weight is approximately 77 kg, missile length 2.845 m and diameter 0.162 m. Range limits are from around 914.4 to 4,572 m.
In October 1993 it was revealed that Loral had proposed the HVM for use on the XM8 Armored Gun System for the US Army. The 105mm gun would be replaced by a two-man turret containing a pod of six HVM weapons on each side. Reloading would be by a boom/winch assembly like that used for the MLRS from another vehicle. Combat weight of the AGS LOSAT would be 20,865 kg.
It would be air-transportable in the Lockheed C-5 Galaxy (6 AGS LOSAT versus 4 Bradley LOSAT), McDonnell Douglas C-17 Globemaster III (3 AGS LOSAT versus 2 Bradley LOSAT), Lockheed C-141 Starfighter (1 AGS LOSAT compared to no Bradley LOSAT) and Lockheed C-130 Hercules (1 AGS LOSAT compared to no Bradley LOSAT).