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Great Britain's Mark VIII Heavy Tank

Photos

Mark VIII Heavy Tank Liberty:
Great Britain's Mark VIII Heavy Tank Liberty
Mark VIII Heavy Tank Liberty:
Great Britain's Mark VIII Heavy Tank Liberty
Mark VIII Heavy Tank Liberty:
Great Britain's Mark VIII Heavy Tank Liberty

Design

The Mark VIII was to be a joint design by Great Britain and the United States and was nicknamed the International.1

One of the Mark VIIIs was sent to the United States for replication.1

Engine

The British version was to have the Ricardo engine and the American version the Liberty.1 The engine was located in a separate compartment.1

Production

Originally intended to have 4,450 Mark VIIIs built.1

  • Mark VIII Heavy Tank (Great Britain): 51
  • Mark VIII Heavy Tank (United States): ~1001

Usage

Three of the Mark VIIIs manufactured by the British made it to the front lines before World War I ended.1

After World War I

The United States produced around 100 after World War I.1

World War II

The United States sent some of the Mark VIIIs to Canada to be used for training in 1940.1

Specifications

  Mark VIII Heavy Tank
Crew 81
Physical Characteristics  
Weight 37 tons1
37,593 kg1
Length 34' 2"1
10.41 m1
Height 10' 3"1
3.12 m1
Width 12' 4"1
3.76 m1
Width over tracks  
Ground clearance  
Ground contact length  
Ground pressure  
Armament  
Main 2: 6 pdr / 57 mm1
Secondary  
MG 7: 7.7 mm / 0.303" MG1
Side arms  
Quantity  
Main  
Secondary  
MG  
Side arms  
Armor Thickness (mm) 161
Engine (Make / Model) Ricardo1
OR Liberty1
Bore / stroke  
Cooling  
Cylinders V-121
Capacity  
Net HP 3001
Power to weight ratio  
Ignition  
Transmission (Type)  
Steering  
Steering ratio  
Starter  
Electrical system  
Ignition  
Fuel (Type)  
Octane  
Quantity  
Road consumption  
Cross country consumption  
Performance  
Traverse  
Speed - Road 6 mph1
9.7 kph1
Speed - Cross Country  
Range - Road 55 miles1
80 km1
Range - Cross Country  
Turning radius  
Elevation limits  
Fording depth  
Trench crossing  
Vertical obstacle  
Climbing ability  
Suspension (Type)  
Wheels each side  
Return rollers each side  
Tracks (Type)  
Length  
Width  
Diameter  
Number of links  
Pitch  
Tire tread  
Track centers/tread  

Sources:

  1. World War I and II Tanks, George Forty, 2012
20th Century American Military History Crucial Site