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Great Britain's Mark IV Heavy Tank

Photos

Mark IV Heavy Tank:
Great Britain's Mark IV Heavy Tank
Mark IV Heavy Tank:
Great Britain's Mark IV Heavy Tank
Mark IV Heavy Tank:
Great Britain's Mark IV Heavy Tank

Design

Design on the Mark IV Heavy Tank started in October 1916.1

There was an armored external fuel tank mounted in the rear.1

For rail travel the sponsons on the side could be swung inside.1

Production

  • Mark IV Heavy Tanks: 1,1051
    • Production: March / April 1917 - ?1
  • ? (tank tender): 2051

Variants

  • Mark IV Heavy Tank:
  • ?: Tank tender.1 Boosted Daimler 125 HP engine.1 Carried supplies into combat.1

Usage

Battle of Messines Ridge

The Mark IVs were first used in combat at the Battle of Messines Ridge on June 7, 1917.1

Battle of Cambrai

Most of the 476 tanks at the Battle of Cambrai were Mark IVs.1 The battle started on November 20, 1917 and that day has since been known as the Royal Tank Regiment Regimental Day.1

Specifications

  Mark IV Heavy Tank (Male)
Crew 81
Physical Characteristics  
Weight 28 tons1
28,450 kg1
Length 26' 4"1
8.03 m1
Height 8' 2"1
2.49 m1
Width 12' 10"1
3.91 m1
Width over tracks  
Ground clearance  
Ground contact length  
Ground pressure  
Armament  
Main 2: 6 pdr / 57 mm / 2.24" guns1
Secondary 4: 7.7 mm / 0.303" Lewis MG1
MG  
Side arms  
Quantity  
Main  
Secondary  
MG  
Side arms  
Armor Thickness (mm) 121
Engine (Make / Model) Daimler1
Bore / stroke  
Cooling  
Cylinders 61
Capacity  
Net HP 1001
Power to weight ratio  
Ignition  
Transmission (Type)  
Steering  
Steering ratio  
Starter  
Electrical system  
Ignition  
Fuel (Type) Gasoline1
Octane  
Quantity - External 60 gallon1
273 liter1
Road consumption  
Cross country consumption  
Performance  
Traverse  
Speed - Road 3.7 mph1
6 kph1
Speed - Cross Country  
Range - Road 25 miles1
40 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