MEXAS

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The Modular Expandable Armor System (MEXAS) is a composite armour system developed by the German company IBD Deisenroth Engineering. MEXAS was introduced in 1994 and has been applied on over 20,000 combat vehicles worldwide. [1] The successor of MEXAS is the Advanced Modular Armor Protection (AMAP).

Contents

Design

Ceramic armour tiles of MEXAS IDET2007 ceramic armor tiles.jpg
Ceramic armour tiles of MEXAS

The Modular Expandable Armor System (MEXAS) was developed in the early 1990s by IBD Deisenroth and first used in 1994. In 2005 it was succeeded by the next-generation AMAP armour system, which provides a wider variety of different armour options.

MEXAS has been marketed in three versions: MEXAS-L (light) offers protection against small-calibre rounds and can also be fitted on soft-skinned vehicles like MAN military trucks. MEXAS-M (medium) protects the vehicle against autocannon and RPGs with HEAT warheads. MEXAS-H is for use on heavy vehicles like main battle tanks. Depending on version and required protection level MEXAS can protect against kinetic energy penetrators like 30 mm AP, RPGs and mines like the TM-46 mine and TMRP-6 [3] In order to reach different types of desired armour protection MEXAS is either passive armour or non-explosive reactive armour. [4] The exact composition of MEXAS is classified, but according to drawings from the manufacturer the passive version of MEXAS consist of a splinter foil-like specialized Nylon covering a layer of ceramic tiles (possibly materials like aluminium oxide, silicon carbide and boron carbide depending on the user's requirements). Behind the ceramic tiles a layer of aramid backing (e.g. kevlar) is installed. MEXAS also includes spall-liner and depending on the user's requirements a mine-protection kit. The reactive armour version of MEXAS utilizes several spaced multilayer plates consisting of an inert interlayer sandwiched between metal plates. During penetratíon by a shaped charge jet, the sandwich bulges similar to explosive reactive armour (ERA) due to the interlayer absorbing the jet momentum and spreading it radially. [4] Such armour provides better coverage than ERA (up to 85–95% of the surface compared to 30–60%), can be mounted on vehicles with very limited base armour that would not sustain the blast of an ERA tile without damage and has a lower life-cycle cost. [4] MEXAS is only used as adaptable applique armour and is usually not the only protection of a vehicle, but overlaid on the vehicle hull made of ballistic aluminium or armour steel.

During the development of Bionix AFV MEXAS composite armour was adapted to the vehicle. [4] To meet the required protection against heavy machine gun ammunition fired from a distance of 50 metres (160 ft), different options were compared by IBD and ST Kinetics. A 30 millimetres (1.2 in) thick plate of high-hardness armour (HHA) steel provides enough protection. This was indexed as reference to calculate the mass efficiency and thickness efficiency of different armour solutions. [4] Utilizing only 23 millimetres (0.91 in) HHA together with a 10 millimetres (0.39 in) liner to absorb the fragments, the mass efficiency can be increased to 1.2 (the armour provides 1.2 times as much protection as HHA of the same weight). Using a 22 millimetres (0.87 in) MEXAS armour panel on top of 7.3 millimetres (0.29 in) HHA boosts the mass efficiency to 2.5 compared to the HHA reference. [4] The best result was achieved by utilizing a 20 millimetres (0.79 in) thick MEXAS armour panel on top of a 7.3 millimetres (0.29 in) HHA plate fitted with a 10 millimetres (0.39 in) liner on the interior — a mass efficiency of 3.5; however the higher thickness decreased the thickness efficiency to 0.8 compared to the other tested armour layouts. [4]

The Stryker can be fitted with MEXAS applique armour in order to provide protection against 14.5 mm HMG rounds. In 2001 it was discovered that the chemical composition of some ceramic tiles had been altered without notifying the US Army and unapproved sub-contractors supplied the ceramic tiles. [5] The amount of different tile variations allowed by the Army was exceeded drastically — instead of an approved number of six variations the Stryker utilized 39 after undergoing several design changes. [6] This resulted in the early Strykers requiring an additional 3 millimetres (0.12 in) thick steel plate. [5] According to IBD Deisenroth however, all changes had been communicated to General Dynamics, but General Dynamics did not inform the Army. [6] Ulf Deisenroth, president of IBD, claimed that he was never informed about the Army only allowing six ceramic tile variations. [6] Later the supplier of the ceramic tiles was changed to fix these problems.

Applications

MEXAS is used on several vehicles of the German Army like the ATF Dingo, Fuchs 1A7 or the Panzerhaubitze 2000. Some versions of the Leopard 2 MBT utilize MEXAS-H armour at the hull. Prior deployment on peace-keeping missions, vehicles of different countries have been fitted with MEXAS. Norwegian M113s and German MAN trucks have been fitted with MEXAS prior their deployment in KFOR. Some Canadian Leopard 1s, M113s and LAVs have been upgraded with MEXAS. [3] Uparmoured Canadian Leopard 1s have been used in the KFOR and as part of the ISAF in Afghanistan. [7] Other vehicles protected by MEXAS armour include [8] versions of the Swedish Pansarbandvagn 302 and Combat Vehicle 90, the Greek variant Leopard 2 HEL, the Austrian ASCOD Ulan, the Véhicule de l'Avant Blindé, the Textron M1117 Armored Security Vehicle, the Coyote Reconnaissance Vehicle, the ST Kinetics Bionix AFV and the US Stryker vehicles. [5] [9]

Related Research Articles

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<span class="mw-page-title-main">Stryker</span> Canadian/American family of wheeled armored fighting vehicles

The Stryker is a family of eight-wheeled armored fighting vehicles derived from the Canadian LAV III. Stryker vehicles are produced by General Dynamics Land Systems-Canada (GDLS-C) for the United States Army in a plant in London, Ontario. It has four-wheel drive (8×4) and can be switched to all-wheel drive (8×8).

<span class="mw-page-title-main">M113 armored personnel carrier</span> Armored personnel carrier

The M113 is a fully tracked armored personnel carrier (APC) that was developed and produced by the FMC Corporation. The M113 was sent to United States Army Europe in 1961 to replace the mechanized infantry's M59 APCs. The M113 was first used in combat in April 1962 after the United States provided the South Vietnamese army (ARVN) with heavy weaponry such as the M113, under the Military Assistance Command, Vietnam (MACV) program. Eventually, the M113 was the most widely used armored vehicle of the U.S. Army in the Vietnam War and was used to break through heavy thickets in the midst of the jungle to attack and overrun enemy positions. It was largely known as an "APC" or an "ACAV" by the allied forces.

<span class="mw-page-title-main">Leopard 2</span> German main battle tank

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<span class="mw-page-title-main">Bionix AFV</span> Singaporean infantry fighting vehicle

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<span class="mw-page-title-main">TPz Fuchs</span> Amphibious armoured personnel carrier

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<span class="mw-page-title-main">K21</span> South Korean infantry fighting vehicle

The K21 is a South Korean infantry fighting vehicle. A replacement for the K200-series, it was formerly designated as K300 or XK21 KNIFV. The initial production began in 2009, with the Republic of Korea Army planning to field approximately 466 units. It is designed to effectively defeat other IFVs as heavily armed and armored as the BMP-3.

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<span class="mw-page-title-main">Stridsvagn 122</span> Swedish main battle tank

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<span class="mw-page-title-main">ATF Dingo</span> Infantry mobility vehicle

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Advanced Modular Armor Protection (AMAP) is modular composite armour concept, developed by the German company IBD Deisenroth Engineering. According to IBD AMAP is a 4th generation composite armour, making use of nano-ceramics and modern steel alloy technologies. AMAP is the successor of MEXAS.

AMAP-ADS is a hard-kill active protection system (APS), developed by the German company ADS Gesellschaft für aktive Schutzsysteme, a subsidiary of Rheinmetall and IBD Deisenroth Engineering, as part of their Advanced Modular Armor Protection concept. The system is also known under the name AAC in Sweden and as Shark in France. Due to its modular design it can be adapted to a broad range of vehicles. In particular, it is capable of protecting light vehicles against large caliber weapons which the vehicles' light armor wouldn't stop.

IBD Deisenroth Engineering was a German company specializing in the design of armor for military vehicles. They formed in 1981 to develop applications of a new explosive suitable for use in explosive reactive armor (ERA). Through the 1980s, they developed many individual applications for the Bundeswehr. In 1994, they introduced their MEXAS armor systems using ceramic armor which were very popular as upgrade systems for a wide range of armored vehicles, mostly in NATO. MEXAS was replaced by AMAP in 2006, which includes a wide variety of modular armor, both active and passive.

<span class="mw-page-title-main">Sabrah light tank</span> A light tank designed by Elbit Systems

The Sabrah light tank is a configuration of system solutions added to armored fighting vehicles proposed by Elbit Systems. It is designed to complement the fleet of armored fighting vehicles operated by the armed forces worldwide. The tracked light tank configuration is based on ASCOD 2 platform, supplied by Spanish manufacturer GDELS - Santa Bárbara Sistemas. The wheeled light tank configuration is based on the 8×8 Pandur II platform supplied by the Czech manufacturer Excalibur Army. Elbit Systems received a three-year contract worth $172m to supply the Sabrah light tanks to the Philippine Army in January 2021.

References

  1. "IBD Modular EXpandable Armour System (MEXAS) (Germany), Armour systems". Jane's IHS. Archived from the original on August 15, 2011. Retrieved 26 January 2016.
  2. "Archived copy" (PDF). Archived from the original (PDF) on 2011-07-19. Retrieved 2010-06-13.{{cite web}}: CS1 maint: archived copy as title (link)
  3. 1 2 "Modular Expandable Armor System (MEXAS)". Defense Update. 9 June 2006. Archived from the original on 2 February 2016. Retrieved 26 January 2016.
  4. 1 2 3 4 5 6 7 Richard W.O. Kwok; F. U. Deisenroth (2001). "LIGHTWEIGHT PASSIVE ARMOUR FOR INFANTRY CARRIER VEHICLE". 19th International Symposium of Ballistics, 7–11 May 2001, Interlaken, Switzerland: 961–968.
  5. 1 2 3 Rottman, Gordon L. (2006). Stryker Combat Vehicles. Osprey Publishing. p. 17. ISBN   1-84176-930-4.
  6. 1 2 3 Ray Rivera; Hal Bernton (16 September 2003). "Some Stryker tiles fail under fire; maker rushes to fortify vehicles". The Seattle Times Company. Retrieved 26 January 2016.
  7. Priestley, Stephen. "In to Action – Canadian Leopard C2 tanks and the TLAV M113A3s in Combat". Canadian American Strategic Review. CASR. Archived from the original on 9 January 2010. Retrieved 26 January 2016.
  8. User-list on IBD's website Archived 2010-06-12 at the Wayback Machine
  9. Gao, Charlie (2021-11-10). "These Are the 5 Tanks Ready to Defend NATO". The National Interest. Retrieved 2024-04-23.