Vickers Medium Mk. I

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Vickers Medium Mk. I

Icon
UK Medium Tank Tier I
Battle Tiers
123456789101112
Totals
Cost 0  Credits
Hit Points 130140 HP
Weight Limit 11.8/12.212.24/13.2 t
Crew
Commander
Gunner
Driver
Radio Operator
Loader
Mobility
Engine Power 90110 hp
Speed Limit 24 km/h
Traverse 2628 deg/s
Power/Wt Ratio 7.638.99 hp/t
Pivot NoNo
Armor
Hull Armor 6/6/6 mm
Turret Armor6/6/68/8/8 mm
Armament
Damage 37.5-62.552.5-87.5 HP
Penetration 29-4834-56 mm
Rate of Fire
12100% crew: 12.51 rpm
+ Vents: 12.8 rpm
+ BiA : 13.08 rpm
+ Food: 13.65 rpm
13.33100% crew: 13.9 rpm
+ Vents: 14.22 rpm
+ BiA : 14.53 rpm
+ Food: 15.16 rpm
r/m
Accuracy
0.45100% crew: 0.43 m
+ Vents: 0.42 m
+ BiA : 0.41 m
+ Food: 0.4 m
0.52100% crew: 0.5 m
+ Vents: 0.49 m
+ BiA : 0.48 m
+ Food: 0.46 m
m
Aim time
2.9100% crew: 2.78 s
+ Vents: 2.72 s
+ BiA : 2.66 s
+ Food: 2.55 s
2.3100% crew: 2.21 s
+ Vents: 2.16 s
+ BiA : 2.11 s
+ Food: 2.02 s
s
Turret Traverse
32100% crew: 33.37 deg/s
+ Vents: 34.13 deg/s
+ BiA : 34.88 deg/s
+ Food: 36.39 deg/s
32100% crew: 33.37 deg/s
+ Vents: 34.13 deg/s
+ BiA : 34.88 deg/s
+ Food: 36.39 deg/s
deg/s
Gun Arc 360°
Elevation Arc -7°/+16°-7°/+16°
Ammo Capacity 9060 rounds
General
Chance of Fire 2020 %
View Range
260100% crew: 260 m
+ Vents: 265.57 m
+ BiA : 271.14 m
+ Food: 282.29 m
280100% crew: 280 m
+ Vents: 286 m
+ BiA : 292 m
+ Food: 304 m
m
Signal Range
90100% crew: 93.86 m
+ Vents: 95.98 m
+ BiA : 98.1 m
+ Food: 102.34 m
250100% crew: 260.71 m
+ Vents: 266.61 m
+ BiA : 272.5 m
+ Food: 284.29 m
m
Parent none
Child
Contour-UK-GB05 Vickers Medium Mk II.png175 XP
Contour-UK-GB03 Cruiser Mk I.png40 XP
Contour-UK-GB58 Cruiser Mk III.png180 XP
Contour-UK-GB Universal CarrierQF2.png150 XP
Contour-UK-GB25 Loyd Carrier.png150 XP
Research
RT-UK-Vickers Medium Mk. I.jpg
Values are Stock - click for Top
UK-GB01 Vickers Medium Mk I.png

The Vickers Medium Mk. I is a British tier 1 medium tank.

The first British tank to carry the gun in a rotating turret. Development was started in 1922 by Vickers, and several dozen were mass-produced from 1923 through 1925. The tank was in service from 1924 through 1938.

The Vickers Medium Mk. I is the only Tier 1 medium tank. It has a good selection of weapons, all of which are quite viable and powerful for Tier 1, but unfortunately has many severe limitations in many other respects. It has the worst armor of any tier 1, it is very slow, and it is a medium tank so it does not keep its camo bonus while moving making it easy to detect. Recommended playstyle with this is to no engage in close quarters because any tanks with auto cannons or machine guns will shred you like cheese against a cheese grater. It is recommended to try and be a medium range support gun, the top gun's damage is devastating (70) and for a tier 1 it is somewhat accurate (0.52 at 100m).

The Vickers Medium Mk. I leads to the Vickers Medium Mk. II, the Cruiser Mk. I, the Cruiser Mk. III, the Universal Carrier 2-pdr, and the Loyd Gun Carriage.


















Modules

Turret
TierNameArmorTraverse SpeedTraverse ArcView RangeXP CostPriceWeight
01I Vickers Medium Mk. I 0006 6/6/6 mm
32100% crew: 33.37 deg/s
+ Vents: 34.13 deg/s
+ BiA : 34.88 deg/s
+ Food: 36.39 deg/s
32100% crew: 33.37 deg/s
+ Vents: 34.13 deg/s
+ BiA : 34.88 deg/s
+ Food: 36.39 deg/s
d/s
360°
260100% crew: 260 m
+ Vents: 265.57 m
+ BiA : 271.14 m
+ Food: 282.29 m
260100% crew: 260 m
+ Vents: 265.57 m
+ BiA : 271.14 m
+ Food: 282.29 m
m
0------ 0000000000 Credits 1,360 1,360 kg
Guns compatible with this Turret:
Gun
TierNameAmmoDamagePenetrationShell PriceRate of FireAccuracyAim TimeElevationXP CostPriceWeight
01I OQF 3-pdr Gun Mk. I 90 50/50/65 HP 38/66/23 mm 0 Credits/2 Gold/0 Credits
12100% crew: 12.51 rpm
+ Vents: 12.8 rpm
+ BiA : 13.08 rpm
+ Food: 13.65 rpm
r/m
0.45100% crew: 0.43 m
+ Vents: 0.42 m
+ BiA : 0.41 m
+ Food: 0.4 m
m
2.9100% crew: 2.78 s
+ Vents: 2.72 s
+ BiA : 2.66 s
+ Food: 2.55 s
s
-7°/+16° --- 0000000000 Credits 0240 240 kg
01I 15 mm Machine Gun BESA 360 9 HP 25 mm 1 Credits
76.09100% crew: 78.77 rpm
+ Vents: 80.22 rpm
+ BiA : 81.67 rpm
+ Food: 84.52 rpm
Autocannon

Burst Length: 5 rounds
Magazine Size: 40 rounds
Magazine RoF: 430 rpm
Magazine Reload Time: 26.1 s

Click here for more information.
r/m
0.56100% crew: 0.54 m
+ Vents: 0.53 m
+ BiA : 0.51 m
+ Food: 0.49 m
m
2100% crew: 1.92 s
+ Vents: 1.88 s
+ BiA : 1.83 s
+ Food: 1.76 s
s
-7°/+16° 30 1,9001,900 Credits 0070 70 kg

Turret
TierNameArmorTraverse SpeedTraverse ArcView RangeXP CostPriceWeight
02II Vickers Medium Mk. IA* 0008 8/8/8 mm
32100% crew: 33.37 deg/s
+ Vents: 34.13 deg/s
+ BiA : 34.88 deg/s
+ Food: 36.39 deg/s
32100% crew: 33.37 deg/s
+ Vents: 34.13 deg/s
+ BiA : 34.88 deg/s
+ Food: 36.39 deg/s
d/s
360°
280100% crew: 280 m
+ Vents: 286 m
+ BiA : 292 m
+ Food: 304 m
280100% crew: 280 m
+ Vents: 286 m
+ BiA : 292 m
+ Food: 304 m
m
003030 000000500500 Credits 1,750 1,750 kg
Guns compatible with this Turret:
Gun
TierNameAmmoDamagePenetrationShell PriceRate of FireAccuracyAim TimeElevationXP CostPriceWeight
01I OQF 3-pdr Gun Mk. I 90 50/50/65 HP 38/66/23 mm 0 Credits/2 Gold/0 Credits
13.33100% crew: 13.9 rpm
+ Vents: 14.22 rpm
+ BiA : 14.53 rpm
+ Food: 15.16 rpm
r/m
0.45100% crew: 0.43 m
+ Vents: 0.42 m
+ BiA : 0.41 m
+ Food: 0.4 m
m
2.9100% crew: 2.78 s
+ Vents: 2.72 s
+ BiA : 2.66 s
+ Food: 2.55 s
s
-7°/+16° --- 0000000000 Credits 0240 240 kg
01I 15 mm Machine Gun BESA 360 9 HP 25 mm 1 Credits
81.52100% crew: 84.34 rpm
+ Vents: 85.88 rpm
+ BiA : 87.4 rpm
+ Food: 90.4 rpm
Autocannon

Burst Length: 5 rounds
Magazine Size: 40 rounds
Magazine RoF: 430 rpm
Magazine Reload Time: 24 s

Click here for more information.
r/m
0.56100% crew: 0.54 m
+ Vents: 0.53 m
+ BiA : 0.51 m
+ Food: 0.49 m
m
2100% crew: 1.92 s
+ Vents: 1.88 s
+ BiA : 1.83 s
+ Food: 1.76 s
s
-7°/+16° 30 1,9001,900 Credits 0070 70 kg
02II QF 6-pdr 8 cwt Mk. II 60 70/70/95 HP 45/57/29 mm 35 Credits/3 Gold/22 Credits
13.33100% crew: 13.9 rpm
+ Vents: 14.22 rpm
+ BiA : 14.53 rpm
+ Food: 15.16 rpm
r/m
0.52100% crew: 0.5 m
+ Vents: 0.49 m
+ BiA : 0.48 m
+ Food: 0.46 m
m
2.3100% crew: 2.21 s
+ Vents: 2.16 s
+ BiA : 2.11 s
+ Food: 2.02 s
s
-7°/+16° 180 3,0003,000 Credits 0300 300 kg

Engine
TierNamePowerFire ChanceTypeXP CostPriceWeight
01I Armstrong Siddeley V8 0090 90 hp 020 20 % Petrol --- 0000000000 Credits 0200 200 kg
01I Armstrong Siddeley V8 SC 0110 110 hp 020 20 % Petrol 35 000000350350 Credits 0200 200 kg

Suspension
TierNameLoad LimitTraverse SpeedXP CostPriceWeight
01I Vickers Medium Mk. I 12.212.2 t 02626 d/s ------ 0000000000 Credits 3,000 3,000 kg
02II Vickers Medium Mk. IA* 13.213.2 t 02828 d/s 07070 000000500500 Credits 3,000 3,000 kg

Radio
TierNameRangeXP CostPriceWeight
01I Signal flags
90100% crew: 93.86 m
+ Vents: 95.98 m
+ BiA : 98.1 m
+ Food: 102.34 m
90100% crew: 93.86 m
+ Vents: 95.98 m
+ BiA : 98.1 m
+ Food: 102.34 m
m
0--- --- 0000000000 Credits 0001 1 kg
02II WS No. 14
250100% crew: 260.71 m
+ Vents: 266.61 m
+ BiA : 272.5 m
+ Food: 284.29 m
250100% crew: 260.71 m
+ Vents: 266.61 m
+ BiA : 272.5 m
+ Food: 284.29 m
m
0030 30 000000180180 Credits 0040 40 kg

Historical Info

Background

After the First World War Britain disbanded most of its tank units: their number was limited to five tank battalions, equipped with the Mark V and the Medium Mark C. A large budget was at first made available for tank design; this was however all spent on the failed development of the Medium Mark D. When in 1923 the government design bureau, the Tank Design Department, was closed, for the time being any direct official involvement in tank development was terminated. But private enterprise had already taken over the torch. Vickers-Armstrong had built two prototypes of a new tank in 1921.


Vickers Light Tank

In 1920 the Infantry had plans to acquire a Light Infantry Tank. Colonel Johnson of the Tank Design Department derived such a type from the Medium Mark D. In competition Vickers built the Vickers Light Tank.

The Vickers design still was reminiscent of the Great War types. It had a high, lozenge-shaped, track frame with side doors but it also showed some improvements. There was a fully revolving turret and the suspension was sprung by vertical helical springs, while the Medium Mark C still had a fixed turret and was unsprung. The Vickers was really a light tank; it was small vehicle, just seven feet high and weighing only 8.5 short tons. It was driven by a separately compartmented 86 hp engine through an advanced hydraulic Williams-Jenney transmission, allowing infinitely variable turn cycles. The first prototype was a "Female" version with three Hotchkiss machine guns; the second prototype was "Male", its turret bristling with armament with the addition of a 3-pounder gun and a machine gun for anti-aircraft use. It had clearly been intended to give the vehicle a modern look: the turret, the front of the fighting compartment and the hull front plate were all strongly rounded. The advanced transmission proved to be utterly unreliable however and the project was abandoned in 1922 in favour of a generally more conventional design: the Vickers Light Tank Mark I, that would be renamed to Vickers Medium Tank Mark I in 1924 . The first prototypes were sent to Bovington for trial in 1923. The Vickers designation was A2E1.


Description

Despite being in general more conventional, in one aspect the Medium Mark I looked rather modern: instead of a high track run it possessed a low and flat suspension system with five bogies, each having a pair of small double wheels. The axles of these were too weakly constructed; as Major-General N.W. Duncan put it in his Medium Marks I-III: "(...) a perpetual nuisance. The axles were continually breaking and the path of the Mark I tanks was littered with discarded wheels". This was cured by switching to a "box bogie" in 1931. To ease repairs the suspension was not protected by an armoured covering. There were two vertical helical springs of unequal length in each of the five bogie casings attached to the hull. In front and behind the normal ten road wheel pairs, there was a tension wheel pair. Ground pressure was very high, even though at 11.7 long tons the vehicle was not very heavy for its size.

The engine was an air-cooled 90 hp Armstrong Siddeley engine derived from an aircraft type. Surprisingly the engine and transmission was distributed throughout the hull - with the engine to the left of the driver, the gearbox underneath the commander and final drive at the rear, which Duncan describes as "an unbelievable retrograde step in view of war-time experience". The Medium Mark B and the Mark VIII had introduced compartmentalisation to reduce the debilitating effects of engine noise and fumes on the crew. However with the Medium Mark I considerations of ease of maintenance had taken precedence.

The engine drove, via a multiple dry-plate clutch, a four-speed gearbox. It had no synchromesh and switching between gears without excessive noise was a challenge to the driver. A propeller shaft connected the gearbox to a bevel box at the end of the tank which divided the power to a separate epicyclic gear for each track. These gears automatically provided extra emergency torsion to the normal first and second gear if the vehicle suddenly slowed down due to an obstacle or soft ground.

The petrol tanks were at the very rear of the hull, so the fuel lines had to run along the whole length of the vehicle, pumping fuel to a secondary tank that fed the engine by gravity. The engine was lubricated and partially cooled by oil; leakage was common and the original four-gallon reservoir had to be replaced by a 13.5 one. The tank could be electrically started, but only if the motor was already warm, so the first start had to be done by hand from the inside of the vehicle. Maximum speed was about 15 mph and the range about 120 miles.

There was a cylindrical bevelled turret on top of the hull that carried a "Quick Firing" (shell and cartridge in one complete round) three-pounder gun (47 mm calibre) and four ball mountings for Hotchkiss machine guns. A novel, unique feature was a three-man turret. This meant that commander was not distracted with performing either the loader's or gunner's tasks and could fully concentrate on maintaining situational awareness. This gave a huge potential combat advantage, but went largely unnoticed at the time. Other manufacturers tanks did not have this capability until the German Panzer III was developed in 1937. The practical importance of this feature is signified by the fact that later into the World War II, most of both sides tanks' designs either quickly switched to the three-man turret, or were abandoned as obsolete.

There was no co-axial machine gun. There was only room to operate one machine gun from the turret; normally one gun was switched between the respective mountings as the guns were removable. The turret machine gunner doubled as main gun loader. In each side of the hull was a Vickers machine gun. There was one gunner to operate these, he also functioned as a mechanic.

The shape of the Mark I Medium hull was very distinctive. The back was a simple armoured box; the front plate was high and perfectly vertical. Between them, from the armoured hood of the driver at the right of the vehicle six armour plates fanned out to the left, making for a complex hull geometry at that side. In all the tank made an ungainly squat impression. The crew of five was only poorly protected by 6.25 mm plating, rivetted to the chassis, barely enough to counter the threat posed by light machine guns. With its many shot traps the vehicle was unable to withstand even anti-tank rifle fire and it had a high profile. The internal lay-out worsened this vulnerability as the petrol tanks were inside the main compartment.


Operational history

The Medium Mark I replaced some of the Mark V heavy tanks; together with its successor, the slightly improved Vickers Medium Mark II, it served in the Royal Tank Regiments, being the first type of the in total 200 tanks to be phased out in 1938.

The Medium Mark I was the first tank to see "mass" production since the last of the ten Char 2C's had been finished in 1921. Indeed, as of the next tank, the Renault NC27, only about thirty were built, the British Mediums represented most of the world tank production during the Twenties. They never fired a shot in anger and their performance in a real battle can only be speculated upon but as the only modern tanks in existence in the decade after the First World War they provided the British with a unique opportunity to test the many new ideas about mechanised warfare using real operational units. The knowledge thus gained would prove invaluable in the Second World War.
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