Chieftain Mk.10

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Arcade Realistic Simulator

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General info

The Chieftain Mk.10 in the garage.

The Chieftain Mk.10 is a Rank VI British medium tank with a battle rating of 9.3 (AB/RB/SB). It was introduced in Update 1.71 "New E.R.A".

The main purpose, usage and tactics recommendations

General play style

Vehicle characteristics

Tactics

Specific enemies worth noting

Counter-tactics

Pros and cons

Pros:

  • Stillbrew composite turret armor (protection: 450mm against kinetic rounds and 500mm against chemical rounds).
  • Shot L23 APFSDS Capable of penetrating 408mm of steel @ 100m @90°
  • Decent gun depression
  • Peforms very well in a hull down position

Cons:

  • Bad mobility.
  • Upper and lower frontal plates are weak due to the lack of Stillbrew armor.
  • Ammo-racks everywhere.
  • Very high repair cost.

Specifications

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Arcade Realistic Simulator

Armaments

1 × 120 mm Ordnance BL Tk L11 (53 rounds)
1 × 7.62 mm L8A1 machine gun (6,000 rounds)

Main armament

1 × 120 mm Ordnance BL Tk L11 cannon
  • Ammunition Capacity: 53 Shells
  • Gun Depression: -10°
  • Gun Elevation: 20°
  • Turret Rotation Speed: 13.4°/s (Stock), __._°/s (Upgraded), _._°/s (Prior + Full Crew), _._°/s (Prior + Expert Qualif.), _._°/s (Prior + Ace Qualif.)
  • Reload rate: 9.7s (Stock), _.__s (Full Crew), _.__s (Prior + Expert Qualif.), _.__s (Prior + Ace Qualif.)
1 × 120 mm Ordnance BL Tk L11 cannon
  • Ammunition Capacity: 53 Shells
  • Gun Depression: -10°
  • Gun Elevation: 20°
  • Turret Rotation Speed: 13.4°/s (Stock), __._°/s (Upgraded), _._°/s (Prior + Full Crew), _._°/s (Prior + Expert Qualif.), _._°/s (Prior + Ace Qualif.)
  • Reload rate: 9.7s (Stock), _.__s (Full Crew), _.__s (Prior + Expert Qualif.), _.__s (Prior + Ace Qualif.)
1 × 120 mm Ordnance BL Tk L11 cannon
  • Ammunition Capacity: 53 Shells
  • Gun Depression: -10°
  • Gun Elevation: 20°
  • Turret Rotation Speed: 13.4°/s (Stock), __._°/s (Upgraded), _._°/s (Prior + Full Crew), _._°/s (Prior + Expert Qualif.), _._°/s (Prior + Ace Qualif.)
  • Reload rate: 9.7s (Stock), _.__s (Full Crew), _.__s (Prior + Expert Qualif.), _.__s (Prior + Ace Qualif.)
Ammunition
Ammunition Penetration in mm @ 90° Type of
warhead
Velocity
in m/s
Projectile
Mass in kg
Fuse delay
in m:
Fuse sensitivity
in mm:
Explosive Mass in
TNT equivalent
in g:
Normalization At 30°
from horizontal:
Ricochet:
10m 100m 500m 1000m 1500m 2000m 0% 50% 100%
Shot L15A3 320 315 305 294 280 270 APDS 1370 7.6 N/A N/A N/A +1.5° 75° 78° 80°
Shell L31A7 152 152 152 152 152 152 HESH 670 17 0.4 0.1 4,100 +0° 73° 77° 80°
Shot L23 410 408 405 400 390 380 APFSDS 1535 3.9 N/A N/A N/A +1.5° 76° 77° 78°
Ammunition Type of
warhead
Velocity
in m/s
Projectile
Mass in kg
Screen radius
in m
Screen time
in s
Screen hold time
in s:
Explosive Mass in
TNT equivalent
in g:
L34 Smoke 670 17.0 20 5 25 50
Ammo racks
Ammo racks of the Chieftain Mk.10.
Full
ammo
1st
rack empty
2nd
rack empty
3rd
rack empty
4th
rack empty
5th
rack empty
6th
rack empty
Recommendations Visual
discrepancy
53 XX (X+)  (+)  (+)  (+)  (+)  (+) Turret empty:  () no

Secondary armament

1 × 7.62 mm L8A1 machine gun (coaxial)

Crew

  • Commander
  • Gunner
  • Loader
  • Driver

Total: 4 crew members

Armour

Armour type:

  • Stillbrew (Turret front, Turret ring)
  • Cast homogeneous armour (Hull front, Turret)
  • Rolled homogeneous armour (Hull sides, Hull rear, Hull roof, Turret roof)
Armour Front Sides Rear Roof
Hull 70-127 mm (43-79°) Front glacis
76.2 mm (43-44°) Lower glacis
200* mm Turret ring
88-220 (8-30°) + 13 mm Front Top
50 mm (1-31°) Center Top
37 mm (30°) + 13 mm Rear Top
37 (10°) + 13 mm Bottom
37 mm (1-7°) 13-28 mm
Turret 125-250 + 80-150* mm (2-81°) Turret front
100-220 mm (1-53°) Gun mantlet
45-196 mm (1-65°) 45 mm (1°) 50.8 mm Front
25 mm Rear
Armour Sides Roof
Cupola 150 mm 25 mm
Stillbrew* Front Sides Rear Roof
Hull 200 mm Kinetic
200 mm Chemical
N/A N/A N/A
Turret 450 mm Kinetic
500 mm Chemical
N/A N/A N/A

Notes:

  • Suspension wheels and tracks are 20 mm thick.
  • Belly armour is 16 mm thick.
  • Stillbrew armour at turret ring is pure 200 mm CHA.
  • Stillbrew armour on turret front is composed of 80-150 mm CHA + 60 mm Rubber + 150-250 mm CHA.

Engine & mobility

Weight: 57.2 ton

Max Speed: 48 km/h
Stock

  • Engine Power: 1162 hp @ 2100 rpm
  • Power-to-Weight Ratio: 20.31 hp/ton
  • Maximum Inclination: 40°

Upgraded

  • Engine Power: ___ hp @ 2100 rpm
  • Power-to-Weight Ratio: __.__ hp/ton
  • Maximum Inclination: __°
Weight: 57.2 ton

Max Speed: 43 km/h
Stock

  • Engine Power: 663 hp @ 2100 rpm
  • Power-to-Weight Ratio: 11.59 hp/ton
  • Maximum Inclination: 40°

Upgraded

  • Engine Power: ___ hp @ 2000 rpm
  • Power-to-Weight Ratio: __.__ hp/ton
  • Maximum Inclination: __°
Weight: 57.2 ton

Max Speed: 43 km/h
Stock

  • Engine Power: 663 hp @ 2100 rpm
  • Power-to-Weight Ratio: 11.59 hp/ton
  • Maximum Inclination: 40°

Upgraded

  • Engine Power: ___ hp @ 2000 rpm
  • Power-to-Weight Ratio: __.__ hp/ton
  • Maximum Inclination: __°

Modules and improvements

History of creation and combat usage

Concept

The idea of a "universal tank" began in Britain in 1944 when Montgomery and other influential people began advocating for more standardized tank to replace the cruiser and infantry tank classes used on the field. Efforts did not start until after World War II under the General Staff designation A45, with development starting just as the new cruiser tank Centurion started to enter military service. The A45 was cancelled in 1948 after development troubles and its inability to be used as a "universal" platform. Ironically, the Centurion proved to be a better "universal tank" platform than the A45.[1]

Development

The Centurion tank series was very successful in British and its allies' service, but development of new Soviet armour such as the IS-3 and T-54/55 caused the British tank arms race to take another leap forward. Development on the Centurion's successor began in 1951 under the name Medium Gun Tank No. 2. The project's priority was gun and armour, but with mobility to be equal to the Centurion's and a weight of less than 45 tons. The weight limit caused a program known as the Concept Study Programme to commence in order to find ways to keep the tank under that weight limit yet meet all the armour and firepower specifications. One of the concept that came out was the usage of bagged charges, which was already in use on naval ships, but was a new concept for tank ammunition. Thus, a gun using the bagged charge propellant system began development in 1954, along with a new specification by General Staff that the Medium Gun Tank No.2, now known as FV4201, uses a conventional four crew tank with a turret and a better gun and armour than the Centurion. Though the Conqueror heavy tank was one such response to the firepower requirement, limited production cut that to only 200 units built.[1]

The biggest bump to the firepower of the FV4201 was the recommendation of a 120 mm caliber tank cannon. Though the Conqueror used a 120 mm, the new one would incorporate more innovative features such as the bagged charges. Other design features added was the usage of a Rolls-Royce V8 engine, an auxiliary engine, an automatic gearbox, and a reclining seat for the driver. The reclining seat was a very new feature in tank design as it reduced the vehicle's hull height and thus gave it a lower profile. Leyland Motors was assigned to be the main designer for the tank despite their commitment to the Centurion production lines. The manufacturing process of the tank was decided to be cast rather than welded. In 1957, several specifications added to the FV4201 impeded its attempt to fit in the specifications. A bigger turret was designed and it mounted IR equipment for night fighting. Troops requested more frontal and turret side armour, which along with the turret change caused an increase in the tank's overall weight. A controversial decision was also made in 1957 by NATO that tanks should have multi-fuel engines. The FV4201 installed a new engine conforming to these standards in 1958, a German engine derived from a Junkers Jumo aviation engine. This extended development time since the engine compartment had to be redesigned to fit the engine, raising the total tank weight to 50 tons. The engine, designated the L60, was received with mixed reception by the Royal Armoured Corps (RAC) and other users due to its novel features. Britain stayed as the only user of a multi-fuel engine in the Cold War as many other nations found the concept impractical and abandoned it.[1]

As the FV4201 finalized its prototype stages, General Staff sent a revised specification for it. The tank was to have the firepower of the Conqueror with the mobility of the Centurion, an armour that maximizes the protection-weight ratio, a weight limit at 45 ton with a top speed of 26 mph and an operating range of 300 miles. The first wooden prototype was made in March 1959, with full prototypes ordered in June 1959 for troop trials. Vickers-Armstrong and Royal Ordnance Factory shared the manufacturing process and the first prototypes were built in January 1960. The first two prototype FV4201 was trialed in Germany alongside their new Leopard 1. The greatest issue with the FV4201 was the engine, which caused many failures due to vibration, a result of the flawed multi-fuel concept. Trials were delayed due to lack of parts to fix broken pieces and redesigns were requested to fix problems. After a lengthy trial period in 1962, the FV4201, now named the Chieftain, was sent to the operational unit in Germany for service and combat trials. The Chieftain was finally accepted for service in 1st May 1963, despite the many faults in the design. The first deliveries of the improved and redesigned Chieftains began in mid-1965. These were the Chieftain Mk.1's, which further revealed problems with the horsepower that the Mk.2 was designed and sent in April 1966. The Chieftain Mk.3 rolled out of the production lines in September 1969, it now weighed 53 tons and the L60 engine was producing 650 hp, still underpowered for the weight. Engine failures were still frequent and left the Chieftain with a sour note until the Mk.5 variant fixed these pressing issues with a new engine and NBC protection. The Mk.5 would be the main variant of the Chieftain in British service. During its production life from 1965 to 1985, a total of 2,265 Chieftains would be built by Britain, with about 1,000 used by the British Army.[1]

Service

The first British units to receive the Chieftains was the 1st and 5th Royal Tank Regiments back during the trials. The Chieftain, despite its initial engine flaws, proved to be combat-proof and could be upgraded to fit new requirements. Some of these upgrades were the addition of composite add-on armour to fight off new anti-tank technology such as the HEAT rounds. The Chieftain earned the title "most formidable tank in the world" during the 1960's Cold War period and also redefined the specifications of a "main battle tank". Its success is due to its novel main gun and heavily sloped armour, as well as a satisfactory mobility and speed able to compete with the Leopard 1. The Chieftain stayed in use by the British Army On the Rhine on the German border with the Warsaw Pact, which caused the Soviets to in turn station their best tanks such as their T-64's against the Chieftains. The British retained the Chieftains all the way until 1995, when it was replaced by the Challenger I.

The Chieftain was also successful on the export market, primarily in the Middle East to the hands of Iran, Jordan, Kuwait, and Oman. Another user of the Chieftain was Israel, with Britain initially agreeing to help set up production for locally produced Chieftains. Two Chieftains were sent for trials among the Israeli Defense Force in 1967. After two years of trials and deliberation for the acquirement of the Chieftains, Britain ultimately refused to offer the Israelis the Chieftain for political reasons. The Israeli trials benefit Britain with data on desert combat with the Chieftain however, and the refusal did jump start Israel's tank program that would become the Merkava.

Despite that, sales to the Middle East soared, with Iran being the major buyer of the Chieftains with at least 887 of mostly the MK3 and MK5 variants sent to them before their revolution in 1979. The Chieftain saw prolonged combat in the Middle East in the Iran-Iraq War, including Operation Nasr which was the largest tank vs. tank battle of the war where the Iranian Chieftains and M60A1 Pattons fought against the Iraqi T-62s. After that war, the Chieftain in Kuwait then saw combat fighting the Iraqis during their invasion in 1990. Kuwait eventually replaced their Chieftains with the Yugoslavian M-84 tanks, which are a variant of the Soviet T-72s.

The Chieftain is still in service Iran, Jordan, and Oman in varying numbers, about 100 in Iran, 350 in Jordan, and 27 in Oman. The Chieftains underwent local upgrades to keep them up to date against modern threat, which resulted in the Iran Mobarez Chieftain upgrade.

Legacy

The Chieftain helped revolutionize tank design with its innovative features. The most important was the reclining driver seat, which allowed the tank to have a lower profile as the driver was now that highest part of the hull in tank design. It also had the most powerful NATO tank armament in service until the advent of the German Rheinmetall 120 mm, which came about two decades later. Chieftain can be considered the definitive main battle tank of the 1960s and help transition the path between second-generation main battle tanks and the third.

Screenshots and fan art

Skins and camouflages for the _____ from live.warthunder.com.

Additional information (links)

[Devblog] Chieftain Mk.10: Dressing Up for War

References

  1. 1.0 1.1 1.2 1.3 Dunstan Simon. Chieftain Main Battle Tank 1965-2003 Great Britain: Osprey Publishing Ltd., 2003
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uk_chieftain_mk_10.png

Icon-country-gbr.png Chieftain Mk 10
Nation Britain
Type Medium tank
Rank 6
Battle Rating
9.3
9.3
9.3

   Metric✓       Imperial   

   Metric       Imperial✓   

Characteristics
Weight
57,200 kg
126,104 lb
Number of Crew 4
Hull armour thickness
86/37/37/16 mm
3.38/1.46/1.46/0.63 inches
Statistics
Engine power (stock)
1,162 hp
663 hp
663 hp
Engine power (upgraded)
___ hp
750 hp
750 hp
HP/ton ratio (stock)
20.31
20.64
11.59
11.78
11.59
11.78
HP/ton ratio (Upgraded)
__.__
__.__
13.11
13.32
13.11
13.32
Max speed
48 km/h
33.0 mph
43 km/h
29.9 mph
43 km/h
29.9 mph
Main Weapon
1 x 120 mm Ordnance BL Tk L11 Cannon
Ammo stowage 53 rounds
Vertical guidance -10°/20°
Secondary Weapon
1 x 7.62 mm L8A1 Machine gun
Ammo stowage 6,000 rounds
Mount Coaxial
Economy
Required RP 390,000 RP
Vehicle cost 1,010,000 SL
Crew training cost 290,000 SL
Max repair cost*
4,100 SL
4,700 SL
4,700 SL
Free repair time (Stock)
7d
12d
12d
Free repair time (Upgraded)
_d __h
_d __h
_d __h
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