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Great Britain's Light Tanks Mk I, Mk IA

Photos

Light Tank Mk I:
Great Britain's Light Tank Mk I
Royal Armored Corps Tank Museum
Light Tank Mk IAs traveling from Rawalpindi to Kohat in 1931:
Great Britain's Light Tank Mk I
Royal Armored Corps Tank Museum

Design

Turret

The turret contained the commander and the .303 Vickers machine gun.5

Suspension

The suspension has two pairs of leaf sprung bogies.5 There were three return rollers.5

The Light Tank MK IA had a Horstmann suspension that had coil springs.5

Production

  • Light Tank Mk I:
    • Manufacturer: Vickers Armstrong3

Variants

  • Light Tank Mk I:
  • Light Tank Mk IA: Had additional armor.6 The turret was larger.5

Usage

The Light Tank Mk I entered service in 1930.3,6

India

In 1931, four Light Tank Mk IAs were sent to India for tropical trials.5 These had unmovable square cupolas installed.5 Asbestos was chosen for insulation from heat after several different materials were tried.5

Specifications

  Light Tank Mk I
Crew 24,5,6
Physical Characteristics  
Weight 4.8 tons4,5
Length 13' 2"4,5
Height 5' 7"4,5
Width 6' 1"4,5
Width over tracks  
Ground clearance  
Ground contact length  
Ground pressure  
Turret ring diameter  
Armament (mm)  
Main 1: .303 Vickers MG4,5
Secondary  
MG  
Side arms  
Quantity  
Main 2,5005
Secondary  
MG  
Side arms  
Armor Thickness (mm) 4 - 144,5
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) Meadows EPT4
Meadows5
Bore / stroke  
Cooling  
Cylinders 65
Capacity  
Net HP 58@2,400 rpm5
Power to weight ratio 12.1 hp/ton5
Compression ratio  
Transmission (Type) 4 forward, 1 reverse5
Steering Clutch and brake5
Steering ratio  
Starter  
Electrical system  
Ignition  
Fuel (Type)  
Octane  
Capacity  
Road consumption  
Cross country consumption  
Performance  
Traverse  
Speed - Road 30 mph4, 32 mph5
Speed - Cross Country  
Range - Road 160 miles5
Range - Cross Country  
Turning radius  
Elevation limits  
Fording depth  
Trench crossing  
Vertical obstacle  
Climbing ability  
Suspension (Type) Horstmann4
Two wheel bogies leaf springs5
Wheels each side  
Return rollers each side 35
Tracks (Type)  
Length  
Width  
Diameter  
Number of links  
Pitch  
Tire tread  
Track centers/tread  
  Light Tank Mk IA
Crew 25
Physical Characteristics  
Weight 4.8 tons5
Length 13' 2"5
Height 5' 7"5
Width 6' 1"5
Width over tracks  
Ground clearance  
Ground contact length  
Ground pressure  
Turret ring diameter  
Armament (mm)  
Main 1: .303 Vickers MG5
Secondary  
MG  
Side arms  
Quantity  
Main 2,5005
Secondary  
MG  
Side arms  
Armor Thickness (mm) 4 - 145
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) Meadows5
Bore / stroke  
Cooling  
Cylinders 65
Capacity  
Net HP 58@2,400 rpm5
Power to weight ratio 12.1 hp/ton5
Compression ratio  
Transmission (Type)  
Steering  
Steering ratio  
Starter  
Electrical system  
Ignition  
Fuel (Type)  
Octane  
Capacity  
Road consumption  
Cross country consumption  
Performance  
Traverse  
Speed - Road 32 mph5
Speed - Cross Country  
Range - Road 160 miles5
Range - Cross Country  
Turning radius  
Elevation limits  
Fording depth  
Trench crossing  
Vertical obstacle  
Climbing ability  
Suspension (Type) Horstmann5
Wheels each side  
Return rollers each side 35
Tracks (Type)  
Length  
Width  
Diameter  
Number of links  
Pitch  
Tire tread  
Track centers/tread  

Sources:

  1. The Encyclopedia of Tanks and Armored Fighting Vehicles - The Comprehensive Guide to Over 900 Armored Fighting Vehicles From 1915 to the Present Day, General Editor: Christopher F. Foss, 2002
  2. British and American Tanks of World War Two, The Complete Illustrated History of British, American, and Commonwealth Tanks 1933-1945, Peter Chamberlain and Chris Ellis, 1969
  3. World War Two Tanks, George Forty, 1995
  4. Tanks of the World, 1915-1945, Peter Chamberlain, Chris Ellis, 1972
  5. AFV #5: Light Tanks Marks I-VI, Major-General N. W. Duncan
  6. The Encyclopedia of Weapons of World War II, Chris Bishop, 1998
20th Century American Military History Crucial Site