2025 Challenger

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2025 Challenger

This article is about the British battle tank. For the Gaza Freedom Flotilla boat Challenger 2, see Gaza Freedom Flotilla.

Main battle tank

FV 4034 Challenger 2
Challenger 2 Main Battle Tank patrolling outside Basra, Iraq MOD 45148325.jpg

A Challenger 2 tank patrolling outside Basra, Iraq, during Operation Telic
Type Main battle tank
Place of origin United Kingdom
Service history
In service 1998–present
Used by British Army, Oman Army
Wars Iraq War
Production history
Manufacturer Alvis plc, BAE Systems Land & Armaments
Unit cost £4,217,000[1]
Produced 1993–2002
No. built ≈ 447
Specifications
Mass 64 tonnes (63 long tons; 71 short tons),[2] with a combat ready weight of 75.0 tonnes (73.8 long tons; 82.7 short tons) with add-on armour modules.
Length 8.3 m (27 ft 3 in), 13.50 m (44 ft 3 in) with gun forward
Width 3.5 m (11 ft 6 in), 4.2 m (13 ft 9 in) with appliqué armour
Height 2.49 m (8 ft 2 in)
Crew 4 (commander, gunner, loader/operator, driver)
Armour Chobham / Dorchester Level 2 (classified)

Main
armament

 L30A1 120 mm rifled gun with 47 rounds [3] [4]

Secondary
armament

 Coaxial 7.62 mm L94A1 chain gun EX-34 (chain gun), 7.62 mm L37A2 Operator/Loader's hatch machine gun
Engine Perkins CV12-6A V12 diesel 26.1 litre
1,200 bhp (890 kW)
Power/weight 18.7 hp/t (13.9 kW/t) at 64t, 16.0 hp/t (11.9 kW/t) at 75.0t.
Transmission David Brown TN54E epicyclic transmission (6 fwd, 2 rev.)
Suspension Hydropneumatic suspension
Ground clearance 0.5 m (1 ft 8 in)[5]
Fuel capacity 1,592 litres (350 imp gal; 421 US gal)[5]

Operational
range

 550 km (340 mi) on road,[6] 250 km (160 mi) off road on internal fuel[5]
Maximum speed 59 km/h (37 mph) on road,[7] 40 km/h (25 mph) off road[5]

The FV4034 Challenger 2 (MOD designation "CR2") is a third generation British main battle tank (MBT) in service with the armies of the United Kingdom and Oman. It was designed and built by the British company Vickers Defence Systems (now known as BAE Systems Land & Armaments).[8]

Vickers Defence Systems began to develop a successor to the Challenger 1 as a private venture in 1986. The Ministry of Defence ordered a prototype in December 1988. In June 1991, the MoD placed an order for 140 vehicles, with a further 268 ordered in 1994. Production began in 1993 and the unit's tanks were delivered in July 1994, replacing the Challenger 1. After a production delay, the tank entered service with the British Army in 1998, with the last delivered in 2002. The Challenger 2 was also exported to Oman.

The Challenger 2 is an extensive redesign of the Challenger 1. Although the hull and automotive components seem similar, they are of a newer design than for the Challenger 1 and only around 3% of components are interchangeable.[9] A visual recognition feature is the armoured housing for the TOGS thermal gunsight: the Challenger 2 has this above the gun barrel, the Challenger 1 has it at the right hand side of the turret. The tank has a 550 km range and maximum road speed of 59 km/h.

The Challenger 2 is equipped with a 120-millimetre (4.7 in) 55-calibre long L30A1 tank gun,[10] the successor to the L11 gun used on the Chieftain and Challenger 1. Unique among NATO main battle tank armament, the L30A1 is rifled, because the British Army continues to place a premium on the use of high-explosive squash head (HESH) rounds in addition to armour-piercing fin-stabilised discarding-sabot rounds. The Challenger 2 is also armed with a L94A1 EX-34 7.62 mm chain gun and a 7.62 mm L37A2 (GPMG) machine gun. Fifty main armament rounds[11] and 4,200 rounds of 7.62 mm ammunition are carried.

The Challenger 2 has a four-man crew. The turret and hull are protected with second generation Chobham armour (also known as Dorchester). To date, the only time the tank has been destroyed during operations was by another Challenger 2 in a "blue on blue" (friendly fire) incident at Basra in 2003 when the destroyed tank had its hatch open at the time of the incident.

It has seen operational service in Bosnia and Herzegovina, Kosovo and Iraq.[12]

Since entering service, various upgrades have sought to improve the Challenger 2's protection, mobility and lethality, the most recent of which was the Life Extension Programme (LEP). In March 2021, the British Army announced plans to upgrade 148 Challenger 2s under LEP with the aim to extend its service life out to at least 2035; these upgraded models will be known as Challenger 3. Unupgraded Challenger 2s will be retired.[13]

History [edit]

The Challenger 2 is the third vehicle of this name, the first being the A30 Challenger, a World War II design using the Cromwell tank chassis with a 17-pounder gun. The second was the Persian Gulf War era Challenger 1, which was the British army's main battle tank (MBT) from the early 1980s to the mid-1990s.

Vickers Defence Systems began to develop a successor to Challenger 1 as a private venture in 1986. Following the issue of a Staff Requirement for a next-generation tank, Vickers submitted its plans for the Challenger 2 to the Ministry of Defence (MoD). Vicker's indigenous design was received skeptically by some senior MoD officials, and was evaluated against the American M1 Abrams offered by General Dynamics. After some supportive lobbying by Baron Young, the Thatcher government chose to proceed with the Challenger 2 in December 1988.[14] Vickers received a £90 million contract for a demonstrator vehicle to be delivered by September 1990.[15] [14] The demonstration phase had three milestones for progress, with dates of September 1989, March 1990, and September 1990. At the last of these milestones, Vickers was to have met 11 key criteria for the tank's design.[15]

The Challenger I's performance in the Gulf War bolstered the MoD's confidence in British armour.[16] The MoD evaluated the American M1A2 Abrams, the French Leclerc and the West German Leopard 2 against the Challenger 2.[16] The MoD rejected these alternatives, and in June 1991,[16] the MoD placed a £520 million order for 127 MBTs and 13 driver training vehicles.[ citation needed ] An order for a further 259 tanks and 9 driver trainers (worth £800 million) was placed in 1994.

Vickers struggled to market the tank for export.[17] Its one success led to Oman ordering 38 Challenger 2s; 18 in June 1993 [18] and a further 20 in November 1997.[ citation needed ] Both batches ordered by Oman contain notable differences to the UK version - a larger cooling group and rear towing eyes, running gear and bazooka plates similar to Challenger 1, and a loaders Browning 0.5 Calibre M2 Heavy Machine Gun. Deliveries of Challenger 2 to Oman were completed in 2001.

Production began in 1993 at two primary sites: Elswick, Tyne and Wear and Barnbow, Leeds, although over 250 subcontractors were involved. The first tanks were delivered in July 1994.

The Challenger 2 failed the acceptance trials in 1994 and it was forced into the Progressive Reliability Growth Trial in 1995. Three vehicles were tested for 285 simulated battlefield days.

The tank was then accepted into service in 1998. An equally important milestone was the In-Service Reliability Demonstration (ISRD) in 1998. The CR2 In-Service Reliability Demonstration (ISRD) milestone was successfully achieved in January 1999. The ISRD took place from September to December 1998. 12 fully crewed tanks were tested at the Bovington test tracks and at Lulworth Bindon ranges. The tank exceeded all staff requirements.

The Challenger 2 entered service with the British Army in June 1998 (with the Royal Scots Dragoon Guards), with the last delivered in 2002. Under Army 2020, only three Challenger 2 Tank Regiments will remain: the Queen's Royal Hussars, the King's Royal Hussars and the Royal Tank Regiment, each of which is the tank Regiment of an Armoured Infantry Brigade. A single Army Reserve regiment, The Royal Wessex Yeomanry, will provide reservist Challenger crews to the regular regiments.

The Trojan minefield breaching vehicle and the Titan bridge-laying vehicle based on the chassis of the Challenger 2 were shown in November 2006; 66 are to be supplied by BAE Systems to the Royal Engineers, at a cost of £250 million.[19]

A British military document from 2001 indicated that the British Army would not procure a replacement for the Challenger 2 because of a lack of foreseeable conventional threats in the future.[20] However, IHS Jane's 360 reported on 20 September 2015 that following discussions with Senior Army Officers and Procurement Officials at DSEI 2015, as well as the head of the British Army, General Sir Nick Carter, that the British Army was looking at either upgrading the Challenger 2 or outright replacing it. Sources confirmed that the future of the MBT was being considered at the highest levels of the Army. This stemmed from the British Army's concern with the new Russian T-14 Armata main battle tank and the growing ineffectiveness of the aging L30 rifled gun and its limited suite of ammunition. Further, it was confirmed that numerous armoured vehicle manufacturers had discussions with the MoD about a potential replacement for the Challenger 2.[21] Shortly after, the British Army decided that purchasing a new tank would be too expensive and chose to proceed with a Challenger 2 life extension project (LEP).[22] It is expected to remain in service until 2025.[23] Maintenance and overhaul of the Challenger 2 is currently undertaken by Babcock Defence Support Group, and design authority for the tank is held by BAE Systems.[24] [25]

Design [edit]

Armament [edit]

A Challenger 2 firing its main armament during an exercise. The shell is visible to the left of the smoke cloud.

Close-up of muzzle showing rifling

A row of Challenger 2 on a firing range at BATUS, Canada

The Challenger 2 is equipped with a 120-millimetre (4.7 in) 55-calibre long L30A1 tank gun,[10] the successor to the L11 gun used on Chieftain and Challenger 1. The gun is made from high strength electro-slag remelting (ESR) steel with a chromium alloy lining and, like earlier British 120 mm guns, it is insulated by a thermal sleeve. It is fitted with a muzzle reference system and fume extractor, and is controlled by an all-electric control and stabilization system. The turret has a rotation time of 9 seconds through 360 degrees.

Uniquely among NATO main battle tank armament, the L30A1 is rifled and along with its predecessor, Royal Ordnance L11A5, the only Third Generation Main Battle Tank Guns to use a rifled barrel. This is because the British Army continues to place a premium on the use of high explosive squash head (HESH) rounds in addition to Armour-piercing fin-stabilized discarding-sabot rounds. HESH rounds have a longer range (up to 8 kilometres or 5 miles further) than APFSDS, and are more effective against buildings and thin-skinned vehicles.[26]

Forty-nine main armament rounds are carried in the turret and hull; these are a mix of L27A1 APFSDS (also referred to as CHARM 3), L31 HESH and L34 white phosphorus smoke rounds, depending on the situation. As with earlier versions of the 120 mm gun, the propellant charges are loaded separately from the shell or KE projectile. A combustible rigid charge is used for the APFSDS rounds and a combustible hemispherical bag charge for the HESH and Smoke rounds. An electrically fired vent tube is used to initiate firing of the main armament rounds. (The main armament ammunition is thus described to be "three-part ammunition", consisting of the projectile, charge and vent tube.) The separation of ammunition pieces also aids in ensuring lower chances of ammunition detonation.

The Challenger 2 is also armed with a L94A1 EX-34 7.62 mm chain gun coaxially to the left of the main gun, and a 7.62 mm L37A2 (GPMG) machine gun mounted on a pintle on the loader's hatch ring. 4,200 rounds of 7.62 mm ammunition are carried. The Challenger can also mount a Leonardo "Enforcer" remote control weapons system bearing a 7.62 mm L37A2 (GPMG) machine gun, a 12.7mm heavy machine gun or a 40mm automatic grenade launcher.[27]

Fire control and sights [edit]

Close up view of a Challenger 2

The digital fire control computer from Computing Devices Co of Canada contains two 32-bit processors with a MIL STD1553B databus, and has capacity for additional systems, such as a Battlefield Information Control System.

The commander has a panoramic SAGEM VS 580-10 gyrostabilised sight with laser rangefinder. Elevation range is +35° to −35°. The commander's station is equipped with eight periscopes for 360° vision.

The Thermal Observation and Gunnery Sight II (TOGS II), from Thales, provides night vision. The thermal image is displayed on both the gunner's and commander's sights and monitors. The gunner has a stabilised primary sight using a laser rangefinder with a range of 200 m (660 ft) to 10 km (6.2 mi). The driver's position is equipped with a Thales Optronics image-intensifying Passive Driving Periscope (PDP) for night driving and a rear view thermal camera.

Protection [edit]

Challenger 2 with armour upgrades to the sides of the turret, skirts, bar armour to rear. Smoke grenade launchers visible on turret front. Counter-IED ECM antennas are on the platform on the turret, and additional ECM equipment overhangs the left and right front fenders. A remote controlled weapon systems (RCWS) has also been fitted to the turret.

The Challenger 2 is a heavily armoured and well protected tank.[28] The turret and hull are protected by second generation of Chobham armour (also known as Dorchester), the details of which are classified but which is said to have a mass efficiency more than two times that of rolled homogeneous armor against high explosive anti tank projectiles. Crew safety was paramount in the design, using a solid state electric drive for its turret and gun movement, thus removing the traditional risk of hydraulic rupture into the crew compartment. Explosive reactive armour kits are also fitted as necessary along with additional bar armour. The nuclear, biological and chemical (NBC) protection system is located in the turret bustle. The tank's shape is also designed to minimise its radar signature. On each side of the turret are five L8 smoke grenade dischargers. The Challenger 2 can also create smoke by injecting diesel fuel into the exhaust manifolds.

Drive system [edit]

A Royal Scots Dragoon Guards Challenger 2 climbing an obstacle during a training exercise 17 November 2008, in Basra, Iraq

The tank's drive system comprises:

  • Engine: Perkins 26.1 litre, 60° Vee, twin turbo-charged, CV12-6A four-stroke, four valve per cylinder (pushrod), direct injection diesel engine delivering 1,200 bhp (890 kW) at 2300rpm. Torque 4126 Nm at 1700rpm.[29] The engine and gearbox are controlled by a Petards Vehicle Integrated Control System (VICS).[30]
  • Gearbox: David Brown Santasalo TN54E epicyclical transmission (6 fwd, 2 rev.) rated at 1200 bhp and upgradable to 1500 bhp.[31]
  • Suspension: Horstman Defence Systems second (current) or third-generation (future) hydrogas suspension units (HSU).[32] [33]
  • Track: William Cook Defence hydraulically adjustable TR60 414FS double-pin.[34]
  • Maximum speed: 37 mph (60 km/h) on road; 25 mph (40 km/h) cross country
  • Range: 342 mi or 550 km on road with external fuel; 156 mi (250 km) cross country on internal fuel.

The tank is also fitted with an Extel Systems Wedel APU (Auxiliary Power Unit - also referred to as a GUE [Generating Unit Engine]) based around a 38 kW Perkins P404C-22 Diesel engine, with a 600 A electrical output which can be used to power the vehicle's electrical systems when it is stationary and the main engine is switched off, this replaces the Perkins P4.108 engine fitted when the tank was first introduced.[35] The use of an APU allows for reduced fuel consumption and lowers the audio and thermal signature of the vehicle.

As of 2013, the British Army has, at various events featuring the Challenger 2, begun to state the on-road range of 550 km as opposed to an earlier stated value of 450 km.[6] They have also publicly stated a maximum road speed of 59 km/h while equipped with 15 tons of additional modules.[6]

Crew and accommodation [edit]

The British Army maintained its requirement for a four-man crew (including a loader) after risk analysis of the incorporation of an automatic loader suggested that auto-loaders reduced battlefield survivability. Mechanical failure and the time required for repair were prime concerns.

Similar to every British tank since the Centurion, and most other British AFVs, Challenger 2 contains a boiling vessel (BV) for water, which can be used to brew tea, ramen or produce other hot beverages and heat boil-in-the-bag meals contained in field ration packs.[36] This BV requirement is general for armoured vehicles of the British Armed Forces, and is unique to the armed forces of the UK and India.

Operational history [edit]

[The tank was] well armoured but in an operational theatre it's not the case that you can have absolute protection. This was not in any way new technology – the device involved was the same type of shaped charge that we have seen used very regularly. No-one has ever said Challenger tanks are impenetrable. We have always said that a big enough bomb will defeat any armour and any vehicle.

— MOD Spokesman, speaking in regard to the Challenger 2 [37]

The Challenger 2 had been used in peacekeeping missions and exercises before, but its first combat use came in March 2003 during the invasion of Iraq. 7th Armoured Brigade, part of 1st Armoured Division, was in action with 120 Challenger 2s around Basra. The type saw extensive use during the siege of Basra, providing fire support to the British forces and knocking out Iraqi tanks, mainly T-54/55s. The problems that had been identified during the large Saif Sareea II exercise, held 18 months earlier, had been solved by the issuing of Urgent Operational Requirements for equipment such as sand filters and so during the invasion of Iraq the tank's operational availability was improved.

A Challenger 2 crosses into Iraq, 2003

During the 2003 invasion of Iraq, the Challenger 2 tanks suffered no tank losses to Iraqi fire. In one encounter within an urban area, a Challenger 2 came under attack from irregular forces with machine guns and rocket propelled grenades. The driver's sight was damaged and while attempting to back away under the commander's directions, the other sights were damaged and the tank threw its tracks entering a ditch. It was hit by 14 rocket propelled grenades from close range and a MILAN anti-tank missile.[38] The crew survived, safe within the tank until it was recovered for repairs, the worst damage being to the sighting system. It was back in operation six hours later. One Challenger 2 operating near Basra survived being hit by 70 RPGs in another incident.[39]

  • 25 March 2003: A friendly fire ("blue-on-blue") incident in Basra in which one Challenger 2 of the Black Watch Battlegroup (2nd Royal Tank Regiment) mistakenly engaged another Challenger 2 of the Queen's Royal Lancers after detecting what was believed to be an enemy flanking manoeuvre on thermal equipment. The attacking tank's second HESH round hit the open commander's hatch lid of the QRL tank sending hot fragments into the turret, killing two crew members. The hit caused a fire that eventually ignited the stowed ammunition, destroying the tank. This is only Challenger 2 to be destroyed on operations.[40] [41] [42]
  • August 2006: An RPG-29 capable of firing a tandem-charge penetrated the frontal lower underbelly armour of a Challenger 2 commanded by Captain Thomas Williams of The Queens's Royal Hussars south east of al-Amarah, southern Iraq. Its driver, Trooper Sean Chance, lost part of his foot in the blast; two more of the crew were slightly injured. Chance was able to reverse the vehicle 1.5 mi (2.4 km) to the regimental aid post despite his injuries.[43] The incident was not made public until May 2007; in response to accusations that crews had been told the tank was impervious to the insurgents' weapons, the MoD said "We have never claimed that the Challenger 2 is impenetrable."[44] Since then, the explosive reactive armour has been replaced with Chobham Armour and the steel underbelly lined with armour as part of the 'Streetfighter' upgrade as a direct response to this incident.[ citation needed ]
  • 6 April 2007: in Basra, Iraq, a shaped charge from an IED penetrated the underside of a tank resulting in the driver losing a leg and causing minor injuries to another soldier.[45] [46]

To help prevent incidents of this nature, Challenger 2s have been upgraded with a new passive armour package, including the use of add-on armour manufactured by Rafael Advanced Defense Systems of Israel.[47] When deployed on operations the Challenger 2 is now normally upgraded to TES (Theatre Entry Standard), which includes a number of modifications including armour and weapon system upgrades.

Upgrades [edit]

CLIP [edit]

The Challenger Lethality Improvement Programme (CLIP) was a programme to replace the current L30A1 rifled gun with the smoothbore Rheinmetall 120 mm gun currently used in the Leopard 2, M1 Abrams and K2 Black Panther. The use of a smoothbore weapon would have allowed Challenger 2 to use NATO standard ammunition, including tungsten-based kinetic energy penetrators which do not have the same political and environmental objections as depleted uranium rounds. The production lines for rifled 120mm ammunition in the UK have been closed for some years so existing stocks of ammunition for the L30A1 are finite.[48]

Challenger 2 fitted with 120 mm smoothbore gun for trials

A single Challenger 2 was fitted with the L55 and underwent trials in January 2006.[49] The smoothbore gun was the same length as the L30A1 and was fitted with the rifled gun's cradle, thermal sleeve, bore evacuator and muzzle reference system. Early trials apparently revealed that the German tungsten DM53 round was more effective than the depleted-uranium CHARM 3.[28] The ammunition storage and handling arrangements had to be changed to cater for the single-piece smoothbore rounds, instead of the separate-loading rifled rounds. Other improvements were also considered, including a regenerative NBC protection system.[50]

CSP / LEP / Challenger 3 [edit]

"Megatron", the British TES reference vehicle, at Bovington fitted with a Mobile Camouflage System (MCS) in 2016

QRH Challenger 2 fitted with dozer blade in Estonia, 2020

In 2005, the MOD recognised a need for a Capability Sustainment Programme (CSP) to extend the service life of the Challenger 2 into the mid-2030s and upgrade its mobility, lethality and survivability.[51] The CSP was planned to be complete by 2020 and was to combine all the upgrades from CLIP, including the fitting of a 120 mm smoothbore gun.[52] [53] By 2014, the CSP programme had been replaced by the Life Extension Programme (LEP) which shared a similar scope of replacing obsolete components and extending the tank's service life from 2025 to 2035, however the 120 mm smoothbore gun had seemingly been abandoned.[54] [55] [56]

In 2015, the British Army provided an insight into the scope of the LEP, dividing it into four key areas, namely:[57]

  • Surveillance and Target Acquisition: Upgrades to the commander's primary sight and gunner's primary sight, as well as the replacement of the thermal observation and gunnery sights (TOGS) with third-generation thermal imaging.
  • Weapon Control System: Upgrades to the fire control computer, fire control panel and gun processing unit.
  • Mobility: Upgrades including third-generation hydrogas suspension, improved air filtration, CV-12 common rail fuel injection, transmission and cooling.
  • Electronic Architecture: Upgrades to the gunner's control handles, video distribution architecture, generic vehicle architecture compliant interfaces, increased on-board processing and improved human machine interface.

The MOD also began assessing active protection systems (APS) on the Challenger 2, including MUSS and Rheinmetall's ROSY Rapid Obscurant System.[58] [59] [60]

In August 2016, the MOD awarded assessment phase contracts to several companies for the Life Extension Programme. These included Team Challenger 2 (a consortium led by BAE Systems and including General Dynamics UK),[61] CMI Defence and Ricardo plc, Rheinmetall and Lockheed Martin UK.[62] [63] In November, the MOD shortlisted two teams led by BAE Systems and Rheinmetall to compete for the LEP which was then estimated to be worth £650 million ($802 million).[64] [65] [66]

In October 2018, BAE Systems unveiled its proposed Challenger 2 LEP technology demonstrator, the "Black Night".[67] The new improvements included a Safran PASEO commander's sight, Leonardo thermal imager for the gunner and Leonardo DNVS 4 night sight. The turret also received modifications to improve the speed of traverse and to provide greater space as well as regenerative braking to generate and store power. Other enhancements included a laser warning system and an active protection system.[67] [68] Months later, in January 2019, Rheinmetall unveiled its proposal which included the development of a completely new turret with fully digital electronic architecture, day and night sights for the commander and gunner, and a Rheinmetall L55 120mm smoothbore gun. Whilst a more substantial upgrade than Black Night, the turret was developed on Rheinmetall's initiative and was not funded by the UK MOD, nor was it part of the MOD's LEP requirements.[69] [70] [71]

In June 2019, BAE Systems and Rheinmetall formed a joint venture company, based in the UK, named Rheinmetall BAE Systems Land (RBSL).[72] Despite the merger, the company was still expected to present two separate proposals for the LEP contract,[73] however, at DSEI 2019, RBSL instead opted to only showcase the Rheinmetall proposal.[74]

In October 2020, the MOD argued against buying a new main battle tank from overseas instead of pursuing the Challenger 2 LEP, stating that an upgraded Challenger 2 would be "comparable – and in certain areas superior" to a Leopard 2 or Abrams.[75]

On 22 March 2021, the MoD published its long-awaited command paper, Defence in a Competitive Age, which confirmed the British Army's plans to upgrade 148 Challenger 2 tanks and designate them Challenger 3.[76] [77] The MoD confirmed the contract with RBSL had been signed, valued at £800 million (US$1 billion), on 7 May 2021. Rheinmetall's more extensive upgrade proposal, including the new 120 mm smoothbore gun, had been accepted. The initial operating capability for the upgraded tanks is expected by 2027, with full operation capability expected to be declared by 2030.[78]

Other In-Service Upgrades [edit]

On 15 December 2017, BAE Systems was awarded a contract to maintain the Challenger 2's thermal imaging system as part of a £15.4 million interim solution separate to the LEP.[79] In October 2019, it was announced that Thales would be supplying their Catherine Megapixel (MP) thermal imaging camera.[80]

HAAIP [edit]

Updates to the automotive components of Challenger 2 and its associated variants are being undertaken separately from CR2 LEP+ as part of the ongoing Heavy Armour Automotive Improvement Programme (HAAIP), which is expected to continue until 2031 to align with the overall Challenger 3 programme.[81] [82] HAAIP has already led to upgrades to the air filtration system, through the use of cleanable air filters with increased operating life, which were tested in Exercise Saif Sareea 3 in October 2018.[83] The HAAIP programme, awarded to BAE Systems, will also apply a common engine (CV12-8A) and suspension standard (3rd generation Hydrogas) to Challenger 2, the DTT, CRARRV, Titan and Trojan, improving reliability.[84]

With regard to the powertrain, BAE Systems were evaluating whether to uprate the existing CV12 engine or swap this for alternative designs. The proposed CV12 upgrade by Caterpillar Defense would fit electronically controlled common rail fuel injection and introduce engine health monitoring (HUMS). This would increase the maximum power output from 1,200bhp to 1,500bhp, reduce battlefield smoke emissions, and improve fleet reliability and availability.[85] [86] Since this information was released (2019) it has been announced that the engines will be updated to the CV12-8A specification, and no further information in the public domain has been released regarding introducing Common Rail Fuel Injection and HUMS. The engines and transmission units have themselves also been remanufactured in recent years.[87] [88] Work to update the base Challenger 2 hull and automotive components, undertaken by DE&S, RBSL and Babcock, commenced in July 2021 in advance of these being converted to Challenger 3s. Equipment replaced during HAAIP will be checked for serviceability, repaired if required, and returned for re-use in the existing Challenger 2 fleet. The hulls will also undergo ultrasonic testing, weld repairs and repainting.[89]

The overall scope of HAAIP as of 2021 includes:[82]

  • CV12-6A engines converted to CV12-8A specification[90] [91]
  • Third Generation Hydrogas Suspension[32] [33] [82]
  • New Hydraulic Track Tensioners (HTT) with in line accumulators[82]
  • Improved Electric Cold Start System (Intake Manifold Heater)[82]
  • New Main Engine Air Intake Filters[92]
  • Improved Main Engine/Transmission Cooling; fitting new high efficiency radiators (596 sets) and fans (294 triple fan sets with mountings and drive systems). These new more modern assemblies will increase cooling capacity and reduce engine fuel cut back mode through improved air flow efficiency.[82] [90] [93] [94] [95]

Variants [edit]

Titan [edit]

Titan Bridge Launcher with No.12 Bridge at Salisbury Plain

The Titan armoured bridge layer is based on aspects of the Challenger 2 running gear and replaced the Chieftain Armoured Vehicle Launched Bridge (ChAVLB). The Titan came into service in 2006 with the Royal Engineers, with 33 in service. Titan can carry a single 26-metre-long bridge or two 12-metre-long bridges. It can also be fitted with a bulldozer blade.

Trojan [edit]

The Trojan Armoured Vehicle Royal Engineers is a combat engineering vehicle designed as a replacement for the Chieftain AVRE (ChAVRE). It uses the Challenger 2 chassis, and carries an articulated excavator arm, a dozer blade, and attachment rails for fascines. Entering service in 2007, 33 were produced.

Challenger 2E [edit]

The Challenger 2E is an export version of the tank. It has a new integrated weapon control and battlefield management system, which includes a gyrostabilised panoramic SAGEM MVS 580-day/thermal sight for the commander and SAGEM SAVAN 15 gyrostabilised day/thermal sight for the gunner, both with eyesafe laser rangefinder. This allows hunter/killer operations with a common engagement sequence. An optional servo-controlled overhead weapons platform can be slaved to the commander's sight to allow operation independent from the turret.

The power pack has been replaced by a new 1,500 hp (1,100 kW) EuroPowerPack with a transversely mounted MTU MT883 diesel engine coupled to Renk HSWL 295TM automatic transmission. The increase in both vehicle performance and durability is significant. The smaller volume but more powerful Europowerpack power pack additionally incorporates as standard a cooling system and air-intake filtration system proved in desert use. The free space in the hull is available for ammunition stowage or for fuel, increasing the vehicle's range to 550 km (340 mi). This powerpack was previously installed on the French Leclerc tanks delivered to the UAE as well as the recovery tank version of the Leclerc in service with the French Army. Further developed versions of the Europowerpack have more recently been installed in the latest serial produced Korean K2 Black Panther tank as well as the new Turkish ALTAY tank.

BAES announced in 2005 that development and export marketing of 2E would stop. This has been linked by the media to the failure of the 2E to be selected for the Hellenic Army in 2002, a competition won by the Leopard 2.[96]

CRARRV [edit]

Titan on exercise in Oman in 2018

The Challenger Armoured Repair and Recovery Vehicle (CRARRV) is an armoured recovery vehicle based on the Challenger 1 hull (with the updated Challenger 2 powertrain) and designed to repair and recover damaged tanks on the battlefield. It has five seats but usually carries a crew of three soldiers from the Royal Electrical and Mechanical Engineers (REME), of the recovery mechanic and vehicle mechanic/technician trades. There is room in the cabin for two further passengers (e.g. crew members of the casualty vehicle) on a temporary basis.

The size and performance are similar to the MBT, but instead of armament it is fitted with:

  • A main winch with 50 tonnes-force pull in a 1:1 configuration or 98 tonnes-force pull using an included pulley in a 2:1 configuration and anchor point on the vehicle, plus a small auxiliary winch to aid in deploying the main winch rope.
  • Atlas crane capable of lifting 6,500 kg (14,300 lb) at a distance of 4.9 m (16 ft) (this is sufficient to lift a Challenger 2 power pack).
  • In order to improve flexibility and supplement the transportation of power packs around the battlefield, the British Army procured a quantity of dedicated CRARRV High Mobility Trailers (CRARRV HMT). Each CRARRV HMT enables a CRARRV to transport a single (Challenger, Titan or Trojan) power pack or two Warrior power packs, by altering the configuration of dedicated fixtures and attachment of fittings.
  • Dozer blade to use as an earth anchor/stabiliser, or in obstacle clearance and fire position preparation.
  • Large set of recovery and heavy repair tools including a man-portable ultrathermic cutting system with an underwater cutting capability and a man-portable welder.

The design prototype is on display at The REME Museum at MoD Lyneham, Wiltshire.

Operators [edit]

Map of Challenger 2 operators.

Accidents [edit]

On 14 June 2017, a Challenger 2 from The Royal Tank Regiment suffered an ammunition explosion during live firing exercises at the Castlemartin Range in Pembrokeshire. The tank was firing 120 mm practice shells with a standard propellant charge. The explosion critically injured the four-man crew, with two later dying of their wounds in hospital. The incident resulted in all British Army tank firing exercises being suspended for 48 hours while the cause of the explosion was investigated. The extent of the damage to the tank, if any, is unknown.[98] It was later determined that a bolt vent axial (BVA) seal assembly had been removed during an earlier exercise and had yet to be replaced at the time of the incident, thus allowing explosive gases to enter the turret space; the lack of a written process for removal and replacement of the seal assembly meant that the crew at the time of the incident was unaware of its absence, and it was also noted that inadequate consideration had been given during the production of the L30 gun as to whether it could be fired without the seal assembly. A second explosion that occurred during the incident was attributed to the detonation of bag charges that had been stowed outside of the internal ammunition bins (rather than inside the bins as per correct procedure).[99]

Replacement [edit]

Early in 2021, the UK has entered talks to be allowed into the European Main Battle Tank project as an observer which may have bearing on a future replacement of the Challenger 2.[100]

Classified specifications leak [edit]

In July 2021, excerpts of the tank's 'Army Equipment Support Publication' (i.e. user manual), containing technical specifications of the vehicle, were posted on the official forums of the war simulation game War Thunder; the poster, allegedly a Challenger 2 tank commander, claimed to have done so in the hope that developer Gaijin Entertainment would modify the performance of the in-game tank to match the specifications detailed in the document.[101] While the uploaded version of the AESP document was edited to appear as though it had been declassified under the UK's Freedom of Information Act 2000, Gaijin Entertainment stated that the MoD provided confirmation the information was in fact still classified, and that disseminating the tank's specifications would be a violation of the Official Secrets Act. Due to these possible legal penalties, Gaijin will not handle the information or incorporate it into their game.[102]

In Media [edit]

The Challenger 2 featured on episode 9 of season 1 of The Grand Tour, in which Jeremy Clarkson uses the tanks weapons to destroy Richard Hammond's vehicle.[103]

See also [edit]

  • List of main battle tanks by generation

Notes [edit]

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References [edit]

  • Rayment, Sean (12 May 2007). "MoD kept failure of best tank quiet". Daily Telegraph. London. Retrieved 9 August 2007. One of the British Army's Challenger 2 tanks was pierced by an Iraqi insurgent missile more than eight months earlier than the Government has previously admitted
  • "Fact file: Challenger 2". BBC News. 7 January 2003. Retrieved 9 July 2008.
  • Houston, Simon (2 April 2003). "Dragoon guards survive ambush". Daily Record. BBC News. Retrieved 14 September 2008.

External links [edit]

  • British army Challenger 2 webpage

2025 Challenger

Source: https://en.wikipedia.org/wiki/Challenger_2

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