A13 Mk I (3rd R.T.R.)

A13 Mk I (3rd R.T.R.)

A13 Mk I (3rd R.T.R.)

Britain

I Rank

Battle rating:

AB	RB	SB
1.0	1.0	1.0

Class:

PREMIUM

Light tank

Purchase:250

This page is about the British light tank A13 Mk I (3rd R.T.R.). For other versions, see A13 (Family).

Description

The Tank, Cruiser, Mk III (A13) (3rd Royal Tank Regiment), also designated in-game as the A13 Mk I (3rd R.T.R.) is a premium rank I British light tank with a battle rating of 1.0 (AB/RB/SB). It was introduced along with the initial British tree line in Update 1.55 "Royal Armour". At some point, it was given for free if you chose Britain as your first nation when you started the game.

General info

Survivability and armour

Describe armour protection. Note the most well protected and key weak areas. Appreciate the layout of modules as well as the number and location of crew members. Is the level of armour protection sufficient, is the placement of modules helpful for survival in combat? If necessary use a visual template to indicate the most secure and weak zones of the armour.

Mobility

Game Mode	Max Speed (km/h)		Weight (tons)	Engine power (horsepower)		Power-to-weight ratio (hp/ton)
	Forward	Reverse		Stock	Upgraded	Stock	Upgraded
Arcade	54	7	13.8	527	649	38.19	47.03
Realistic	48	6		301	340	21.81	24.64

Armaments

Main armament

40 mm OQF 2-pounder
Capacity			Vertical guidance	Horizontal guidance	Stabilizer
87			-15°/+20°	±180°	Vertical
Turret rotation speed (°/s)
Mode	Stock	Upgraded	Prior + Full crew	Prior + Expert qualif.	Prior + Ace qualif.
Arcade	15.23	21.08	_.__	_.__	_.__
Realistic	9.50	11.20	_.__	_.__	_.__
Reloading rate (seconds)
Stock	Prior + Full crew	Prior + Expert qualif.	Prior + Ace qualif.
3.64	_.__	_.__	2.8

Ammunition

Penetration statistics
Ammunition	Type of warhead	Penetration in mm @ 90°
		10m	100m	500m	1000m	1500m	2000m
Shot Mk.1 AP/T	AP	71	68	52	37	27	19
Shot Mk.1 APCBC/T	APCBC	88	83	64	46	33	24
Shot Mk.1 APHV/T	AP	80	78	67	56	47	40
Shell Mk.1 AP/T	APHE	65	62	49	36	26	20

Shell details
Ammunition	Type of warhead	Velocity in m/s	Projectile Mass in kg	Fuse delay in m:	Fuse sensitivity in mm:	Explosive Mass in g (TNT equivalent):	Normalization At 30° from horizontal:	Ricochet:
								0%	50%	100%
Shot Mk.1 AP/T	AP	792	1.08	N/A	N/A	N/A	-1°	47°	60°	65°
Shot Mk.1 APCBC/T	APCBC	792	1.24	N/A	N/A	N/A	+4°	48°	63°	71°
Shot Mk.1 APHV/T	AP	853	1.08	N/A	N/A	N/A	-1°	47°	60°	65°
Shell Mk.1 AP/T	APHE	792	1.08	1.2	9	19	+4°	47°	60°	65°

Ammo racks

Last updated: 1.77.2.128

File:Ammoracks A13MkI.png

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	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)	1 (+86)	No

Center hull empty: 41 (+46)

Machine guns

7.7 mm Vickers
Coaxial mount
Capacity (Belt capacity)				Fire rate (shots/minute)	Vertical guidance	Horizontal guidance
3,500 (250)				390	N/A	N/A

Usage in battles

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 playstyle 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 non-angled armour. The QF 2-pounder has an awfully 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.

Modules

Tier	Mobility		Protection	Firepower
I	Tracks		Parts	Horizontal Drive	Shot Mk.IXB APCBC/T
II	Suspension	Brake System	FPE	Adjustment of Fire	Shot Mk.1 APHV/T
III	Filters		Crew Replenishment	Elevation Mechanism	Smoke grenade
IV	Transmission	Engine		Artillery Support	Shell Mk.1 AP/T
This is a premium vehicle: all modifications are unlocked on purchase

Pros and cons

Pros:

• Good gun for its rank
• Fast
• Slim target
• Has a "lock", which is a primitive form of stabilisation; this makes stopping and firing a useful tactic as the 2-pdr doesn't bounce as much as a non-stabilised gun
• Brings lots of ammo to the fight (87 rounds max)
• Has forward-launching smoke launchers
• Coaxial machine gun
• Good horse-power per ton ratio
• Decent turret sewing rate
• -15° gun depression
• Four crewmen and a three-man turret
• Quite a fast reload, makes finishing off a target both quicker and easier
• Very effective in its historical role, a flanker and scout

Cons:

• Next to no armour
• Barely any response from the engine
• Loses speed when turning
• The ability to carry almost 90 rounds comes at a cost, this cost is that the ammunition is very hard to miss and thus, the A13 series suffers from frequent ammunition detonations
• Wiggles when trying to turn on 5th gear
• Regular machine guns can penetrate side armour
• The coaxial machine gun is a Vickers which, compared to other Rank I machine guns, has an incredibly slow fire rate
• Not effective at anything other than how it was historically used; ill-advised to brawl or support heavier vehicles

History

Describe the history of the creation and combat usage of the ground vehicle in more detail than in the introduction. If the historical reference turns out to be too long, take it to a separate article, taking a link to the article about the vehicle and adding a block "/ History" (example: https://wiki.warthunder.com/(Vehicle-name)/History) and add a link to it here using the main template. Be sure to reference text and sources by using <ref>, as well as adding them at the end of the article. This section may also include the vehicle's dev blog entry (if applicable) and the in-game encyclopedia description (under === In-game description ===, also if applicable).

Media

Excellent additions to the article would be video guides, screenshots from the game, and photos.

See also

Links to the articles on the War Thunder Wiki that you think will be useful for the reader, for example:

• reference to the series of the vehicles;
• links to approximate analogues of other nations and research trees.

External links

Paste links to sources and external resources, such as:

• topic on the official game forum;
• encyclopedia page on the tank;
• other literature.

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