Mark IV A13 Mk.I

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Arcade Realistic Simulator

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General info

The A13 Mk.I in the garage.

The Mark IV A13 Mk I is a reserve British light tank with a battle rating of 1.0. It was introduced along with the initial British tree line in Update 1.55 "Royal Armour".

The main purpose, usage and tactics recommendations

General play style

This vehicle's role is that of a light tank in the truest sense, sporting an acceptable gun, great mobility and virtually no armour to speak of.

This tank has a very active play style and should not be used in the front lines. Instead, use your mobility to your advantage: Spot, flank and provide artillery support for your teammates, blind your enemies with well-placed smokes screens in key avenues. Make sure to only target secluded enemies in flanking tactics so you can take full advantage of the element of surprise and outflank your opponent. Never expose yourself for too long because even anti-aircraft guns are a potential threat to your unangled armour. The QF-2 pounder has an awful long range accuracy so you must get close to your enemies to actually land a shot where you expect. Load up this agile (but reluctant) cat with ammo and flank your enemies with a constant flow of bullets.

Vehicle characteristics

This tank is a good representative of later rank 2-3 british tanks: good mobility, flat and thin frontal armour, bad reverse speed and minimal post-penetration damage.

Driving

Even though the A13 has good mobility, it sometimes feels weird: it looses speed on turns, does not accelerates quite as fast as it's overpowered engine (38.19 HP/ton, stock) should provide it and hill climbing feels hard. All of these flaws come from the gearbox, which has bad and uneven ratios, resulting in a kick when changing speed. Knowing that, you should always keep an eye on the "gear" counter top-left of your screen (activate it in the option menu) since it provides you crucial information on how your tank will react to your commands. With a bit of practice, one should swiftly masters these peculiarities.

Shooting

Since the QF 2-pounder is used on most tanks of Rank 1, it's important to know it well. This cannon has a major disadvantage at distances since it's bullet loose around 20mm of penetration for each 500 m it travels, which is a lot. As if this was not enough, it has poor accuracy, even with the Adjustement of fire modification, hence, one should target large components (crewmens, engine, transmission), of the ennemy or, as distance increases (500 m or more), the general center of the foe. Firing it, you will easily notice it's last but not least flaw: it does almost no post-penetration damage, which means you will need to snipe crew members one by one. Combine this difficulty with a bit of distance and this task can prove tricky pretty quick, sometimes leaving the enemy enough time to replenish it's crew before you finish it off.

On the other hand, this cannon has 5 major advantages: reload speed, close-quarter penetration, a primitive stabilizing system, lots of ammo and awesome gun depression. It's fast reload speed allows it to compensate it's poor accuracy: missed a shot ? why not take another even before you can reposition! Close quarter penetration, one of the best at it's tier, is also a plus: your enemies will only block you shot if you happen to hit a steep-angled plate of armour. This tank has good mobility ? nice !, it can fire on the move too, at low speeds and on relatively flat road though but still, it is much more precise than the comparable BT-7 with its 20-K. Last but not least, small bullets means more bullets: the A13 can bring up to 87 bullets into the game, much more than you need to knock out 3-4 tanks, which means you can try to suppress an enemy and keep it into cover by constantly firing near it (at this rank, this tactic can prove effective against new players). Finally, its good gun depression enables it to fire over hills, peeking only it's small turret, shooting and disappearing swiftly. Use these features cunningly.

Others

Since the addition of smoke in War Thunder, light tanks have it easier. Use your forward-lauching smoke to create a wall of smoke in a strategic place. It can be used to cover your allies, when capturing a point, flanking in a street (urban environment),

Tactics

If it was not clear enough, there it it: the A13 is a flanker, use your speed to outflank ennemies and pray not to be spotted before you can land a few shots.

Specific enemies worth noting

Since your post-penetration damage is awfull, you should avoid attacking tanks with a lot of internal space and crowed tanks. Knowing that, LVT(A)(1), T-28 and the less common T-35 are your worst nightmares. Do not fire at them (unless helped) since they can soak up fire very well.

Counter-tactics

Especially in low-tier battles, watching the flanks is really important since most tanks rely on mobility to avoid being killed on the first shot. Specifically, the A13 Mk I has a very weak side armour, which you can destroy with MG at ranges 500m or lower. Also, since this tank has it's mobility for only protection, shooting the exposed driver should provide you with an easy kill. Do not bother to spend too much ammo on this tank since it has 4 crew members. One could also turn its engine block to this foe to soak its non-HE shells, leaving little chances of igniting the fuel and protecting crewmens in the hull.

Pros and cons

Pros:

  • Good gun for its rank.
  • Fast.
  • Slim target.
  • Has a "lock", which is a primitive form of stabilisation.
  • Brings lots of ammo.
  • Has forward-lauching smoke lauchers!
  • Coaxial MG
  • Good HP/ton ratio
  • Decent turret sewing rate
  • -15° gun depression
  • 4 crewmen

Cons:

  • Next to no armour.
  • Barely any response from the engine.
  • Looses speed when turning
  • Wiggles when trying to turn on 5th gear.
  • Regular MGs can penetrate side armour.

Specifications

Arcade Realistic Simulator

Arcade Realistic Simulator

Arcade Realistic Simulator

Armaments

1 x 40 mm QF 2-pounder cannon (87 Rounds)
1 x 7.7 mm Vickers machine gun (3,500 Rounds)

Main armament

1 x 40 mm QF 2-pounder cannon
  • Ammunition Capacity: 87 Shells
  • Gun Depression: -15°
  • Gun Elevation: 20°
  • Turret Rotation Speed: 9.5°/s (Stock), 13.2°/s (Upgraded), __._°/s (Prior + Full Crew), __._°/s (Prior + Expert Qualif.), __._°/s (Prior + Ace Qualif.)
  • Reloading Rate: 3.6s (Stock), __._s (Full Crew), __._s (Prior + Expert Qualif.), __._s (Prior + Ace Qualif.)
1 x 40 mm QF 2-pounder cannon
  • Ammunition Capacity: 87 Shells
  • Gun Depression: -15°
  • Gun Elevation: 20°
  • Turret Rotation Speed: 9.5°/s (Stock), 11.2°/s (Upgraded), __._°/s (Prior + Full Crew), __._°/s (Prior + Expert Qualif.), __._°/s (Prior + Ace Qualif.)
  • Reloading Rate: 3.6s (Stock), __._s (Full Crew), __._s (Prior + Expert Qualif.), __._s (Prior + Ace Qualif.)
1 x 40 mm QF 2-pounder cannon
  • Ammunition Capacity: 87 Shells
  • Gun Depression: -15°
  • Gun Elevation: 20°
  • Turret Rotation Speed: 9.5°/s (Stock), 11.2°/s (Upgraded), __._°/s (Prior + Full Crew), __._°/s (Prior + Expert Qualif.), __._°/s (Prior + Ace Qualif.)
  • Reloading Rate: 3.6s (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 Mk.1 AP/T 80 79 61 46 32 21 AP 853 1.1 N/A N/A N/A -1° 47° 60° 65°
Shot Mk.1 APCBC/T 74 72 64 58 48 43 APCBC 853 1.2 N/A N/A N/A +4° 48° 63° 71°
Ammo racks

Last updated: 1.77.2.128

Ammo racks of the A13 Mk I.
Full
ammo
1st
rack empty
2nd
rack empty
3rd
rack empty
4th
rack empty
5th
rack empty
6th
rack empty
7th
rack empty
8th
rack empty
9th
rack empty
10th
rack empty
11th
rack empty
12th
rack empty
13th
rack empty
14th
rack empty
15th
rack empty
16th
rack empty
Recommendations Visual
discrepancy
87 78 (+9) 75 (+12) 72 (+15) 69 (+18) 66 (+21) 62 (+25) 60 (+27) 56 (+31) 51 (+36) 47 (+40) 43 (+44) 41 (+46) 36 (+51) 31 (+56) 16 (+71) (+86) Center hull empty: 41 (+46) No

Secondary armament

  • 1 x 7.7 mm Vickers machine gun (coaxial)

Crew

  • Commander
  • Gunner
  • Loader
  • Driver

Total: 4 Crew members

Armour

Armour type:

  • Rolled homogeneous armour
  • Cast homogeneous armour (Gun mantlet)
Armour Front Sides Rear Roof
Hull 14 mm Front plate
14 mm (0-62°) Front glacis
14 mm (64°) Lower glacis
7 + 7 mm 14 mm (0-62°) 14 mm
Turret 14 mm (0-15°) Turret front
14 mm (1-63°) Gun mantlet
14 mm (21°) 14 mm (2°) 14 mm
Armour Sides Roof
Cupola 14 mm 14 mm

Notes:

  • Suspension wheels and tracks are 15 mm thick while the torsion bars in between the side armour are 10 mm thick.

Engine & mobility

Weight: 13.8 ton

Max Speed: 53 km/h
Stock

  • Engine Power: 527 hp @ 1500 rpm
  • Power-to-Weight Ratio: 38.19 hp/ton
  • Maximum Inclination: 40°

Upgraded

  • Engine Power: 649 hp @ 1500 rpm
  • Power-to-Weight Ratio: 47.03 hp/ton
  • Maximum Inclination: 43°
Weight: 13.8 ton

Max Speed: 48 km/h
Stock

  • Engine Power: 301 hp @ 1500 rpm
  • Power-to-Weight Ratio: 21.81 hp/ton
  • Maximum Inclination: 40°

Upgraded

  • Engine Power: 340 hp @ 1500 rpm
  • Power-to-Weight Ratio: 24.64 hp/ton
  • Maximum Inclination: 41°
Weight: 13.8 ton

Max Speed: 48 km/h
Stock

  • Engine Power: 301 hp @ 1500 rpm
  • Power-to-Weight Ratio: 21.81 hp/ton
  • Maximum Inclination: 40°

Upgraded

  • Engine Power: 340 hp @ 1500 rpm
  • Power-to-Weight Ratio: 24.64 hp/ton
  • Maximum Inclination: 41°

Modules and improvements

Tier Mobility Protection Firepower
I Tracks Parts Horizontal drive, Shot Mk.1 APCBC/T
II Suspension, Brake system FPE Adjustment of fire
III Filters Crew replenishment Elevation mechanism, Smoke grenade
IV Transmission, Engine Artillery support

Recommendation:
As per usual,"Parts" and "FPE" should be the focus first for modifications to increase combat survivability. Everything else is fair game after you get those two.

History of creation and combat usage

Development

The British development on their cruiser tanks, tanks that focus on mobility to exploit breakthroughs beyond enemy lines, took a turn in 1936 after General Giffard LeQuesne Martel became the Assistant Director of Mechanization at the British War Office, the head of the army in the government. Martel, an advocate of the tanks, and developer of the concept of "tankettes", witnessed a tank demonstration in 1936 that had Soviet designs. The one that attracted his attention was the BT light tank. The BT's use of the Christie suspension had Martel argue for the usage of the same suspension in their tank designs, to which the British government complied with the purchase and licensing of the system from the Nuffield Organization.

The acquired vehicle from the purchase of the Christie suspension was labeled as the A13E1 and became part of the design development under the designation Cruiser Mk III (A13). The General Staff requested for the vehicle to have 30 mm of armour, a 2-pounder gun, and a road speed of 48 km/h. The original vehicle was extensively reworked due to many interior and mechanical issues. Until the tank design was finished, the British Army adopted the Cruiser Mk I (A9) tank for use, but these tanks were delayed due to the A13's near completion. The first prototype was delivered in 1937 under the name A13E2, this featured the turret from the A9 cruiser tank, with a 2-pounder and a Vickers machine gun. The armour on the prototype was 15 mm and the design could reach a top speed under a governor of 48 km/h (64 km/h ungoverned). The last and revised design was the A13E3 that became adopted by the British Army and ordered into production in 1939. The General Staff specification number for the tank was the A13 Mk. I, Cruiser Tank Mark III. 65 of these tanks were ordered from the Nuffield Mechanization & Aero Limited, to which 30 were built before War Office decided to upgrade the A13 Mk.I with more armour than the A13 Mk.II, Cruiser Tank Mk IV. Some of the A13 Mk.I Cruiser Mk III were also converted into Mk IV to stay modernized.

Combat Usage

The A13 first saw combat in the Battle of France under the British Expeditionary Force in 1940. The A13 encountered many troubles during its employment, the crew having little to no training with the new tanks due to their rushed adoption into service. The tanks were in poor condition and some were even missing parts. The A13s were used in the 1st Armoured Division, but many were either destroyed by the superior German armoured forces or abandoned at Calais during the evacuation of Allied troops at Dunkirk, which forced the units to leave behind their heavier equipment.

After the disaster at France, the A13 were still used to support the war. Some were sent to Greece to support their defense against Germany in the Battle of Greece, but a majority were sent to North Africa as part of the Western Desert Campaign near Libya under the 7th Armoured Division. Compared to the time in France, the A13s in North Africa fared much better, ironing out most of its initial defects, and was even more suited to the environment than other tank designs. The A13 was popular with the crew for its high speed, reliability, and a powerful 2-pounder cannon that could engage a majority of Axis tanks in 1941. However, there was an insufficient number of A13s available for use, so tank units were mixed with the faster cruiser tanks and slower infantry tanks, which caused tactical and logistical difficulties trying to accommodate all of the tanks. Another deficiency with the tank and every other British tank with the 2-pounder was the lack of high-explosive shell issued to the tankers, which made them vulnerable to anti-tank guns, which caused a majority of British tank losses in the North African Campaign. Still, the A13 fared very well with its armour and armament until the late 1941 where better armoured Panzer IIIs and Panzer IVs began to appear on the battlefield.

Due to its growing obsolescence on the battlefield, the A13 was replaced in 1941 by the better armoured A15 Crusader tank.

Screenshots and fan art

Videos

Bovington Tank Museum Tank Chats: A13 Cruiser





Additional information (links)

References


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uk_a_13_mk1.png

Icon-country-gbr.png Mark IV A13 Mk I
Nation Britain
Type Light tank
Rank Reserve
Battle Rating
1.0
1.0
1.0

   Metric✓       Imperial   

   Metric       Imperial✓   

Characteristics
Weight
13,800 kg
30,424 lb
Number of Crew 4
Hull armour thickness
14/14/14/14 mm
0.55/0.55/0.55/0.55 inches
Statistics
Engine power (Stock)
527 hp
301 hp
301 hp
Engine power (Upgraded)
649 hp
340 hp
340 hp
HP/ton ratio (Stock)
38.19
38.80
21.81
22.16
21.81
22.16
HP/ton ratio (Upgraded)
47.03
47.78
24.64
25.03
24.64
25.03
Max speed
53 km/h
33.0 mph
48 km/h
29.7 mph
48 km/h
29.7 mph
Main Weapon
1 x 40 mm QF 2 pounder Cannon
Ammo stowage 87 rounds
Vertical guidance -15°/20°
Secondary Weapon
1 x Vickers Machine gun
Ammo stowage 3,500 rounds
Mount Coaxial
Economy
Required RP N/A
Vehicle cost N/A
Crew training cost 0 SL
Max repair cost*
0 SL
0 SL
0 SL
Free repair time (Stock)
0m
0m
0m
Free repair time (Upgraded)
0m
0m
0m
Warning: this sidebar is a WIP and can be incorrect. Last updated 1.77.2.128.