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Great Britain's Medium Mk III Tanks

Photos

Vickers Medium Tank Mk III:
Great Britain's Vickers Medium Tank Mk III
Royal Armored Corps Tank Museum

Design

The Medium Mk III was based on the A6.1 The primary difference was in the turrets.1 The rear of the main turret had a bulge for radio equipment.1 The machine gun turrets were more forward.1

Prototype

Trials of the first two Medium Mk IIIs was completed in 1933.1 Driving on roads and gunnery performance was satisfactory.1 Off road performance suffered as the bogies would bottom out on obstacles.1 The third prototype made some improvements to the suspension.1

Variants

  • Medium Mk III E1:
  • Medium Mk III E2: Destroyed by fire.1
  • Medium Mk III E3:

Usage

The Headquarters Tank Brigade was assigned the Medium Mk IIIs in 1934.1

Specifications

  Medium Mk III E1
Crew 71
Radio No. 91
Physical Characteristics  
Weight 16 tons1
Length 21' 6"1
Height 9' 8"1
Width 8' 10"1
Ground clearance  
Ground contact length  
Ground pressure  
Turret ring diameter  
Armament  
Main 1: 3 pdr1
Secondary  
MG 3: .303 Vickers MG1
Side arms  
Quantity  
Main  
Secondary  
MG  
Side arms  
Armor Thickness (mm) 9 - 141
Hull Front, Upper  
Hull Front, Lower  
Hull Sides, Upper  
Hull Sides, Lower  
Hull Rear  
Hull Top  
Hull Bottom  
Turret Front  
Turret Sides  
Turret Rear  
Turret Top  
Engine (Make / Model) Armstrong Siddeley1
Cooling Air1
Cylinders V 81
Net HP 180@1,800 rpm1
Transmission (type)  
Fuel (type)  
Octane  
Capacity  
Performance  
Traverse  
Speed - Road 30 mph1
Speed - Cross Country  
Range - Road 120 miles1
Turning Radius  
Elevation Limits  
Fording depth  
Trench crossing  
Vertical Obstacle  
Suspension (Type)  
Wheels each side  
Return rollers each side  
Track length  
Tires  
Track width  
Track centers/tread  
  Medium Mk III E2
Crew 71
Radio  
Physical Characteristics  
Weight 16 tons1
Length 21' 6"1
Height 9' 8"1
Width 8' 10"1
Ground clearance  
Ground contact length  
Ground pressure  
Turret ring diameter  
Armament  
Main 1: 3 pdr1
Secondary  
MG 3: .303 Vickers MG1
Side arms  
Quantity  
Main  
Secondary  
MG  
Side arms  
Armor Thickness (mm) 9 - 141
Hull Front, Upper  
Hull Front, Lower  
Hull Sides, Upper  
Hull Sides, Lower  
Hull Rear  
Hull Top  
Hull Bottom  
Turret Front  
Turret Sides  
Turret Rear  
Turret Top  
Engine (Make / Model) Armstrong Siddeley1
Cooling Air1
Cylinders V 81
Net HP 180@1,800 rpm1
Transmission (type)  
Fuel (type)  
Octane  
Capacity  
Performance  
Traverse  
Speed - Road 30 mph1
Speed - Cross Country  
Range - Road 120 miles1
Turning Radius  
Elevation Limits  
Fording depth  
Trench crossing  
Vertical Obstacle  
Suspension (Type)  
Wheels each side  
Return rollers each side  
Track length  
Tires  
Track width  
Track centers/tread  
  Medium Mk III E3
Crew 71
Radio  
Physical Characteristics  
Weight 16 tons1
Length 21' 6"1
Height 9' 8"1
Width 8' 10"1
Ground clearance  
Ground contact length  
Ground pressure  
Turret ring diameter  
Armament  
Main 1: 3 pdr1
Secondary  
MG 3: .303 Vickers MG1
Side arms  
Quantity  
Main  
Secondary  
MG  
Side arms  
Armor Thickness (mm) 9 - 141
Hull Front, Upper  
Hull Front, Lower  
Hull Sides, Upper  
Hull Sides, Lower  
Hull Rear  
Hull Top  
Hull Bottom  
Turret Front  
Turret Sides  
Turret Rear  
Turret Top  
Engine (Make / Model) Armstrong Siddeley1
Cooling Air1
Cylinders V 81
Net HP 180@1,800 rpm1
Transmission (type)  
Fuel (type)  
Octane  
Capacity  
Performance  
Traverse  
Speed - Road 30 mph1
Speed - Cross Country  
Range - Road 120 miles1
Turning Radius  
Elevation Limits  
Fording depth  
Trench crossing  
Vertical Obstacle  
Suspension (Type)  
Wheels each side  
Return rollers each side  
Track length  
Tires  
Track width  
Track centers/tread  

Sources:

  1. AFV #12 Medium Marks I - III, Major-General N. W. Duncan
20th Century American Military History Crucial Site