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Great Britain's Cruiser Mk VIII, A27M, Cromwell IV

Photos

Cruiser Mk VIII, A27M, Cromwell IV:
Great Britain's Cruiser Mk VIII, A27M, Cromwell IV
©IWM
Cruiser Mk VIII, A27M, Cromwell IV:
Great Britain's Cruiser Mk VIII, A27M, Cromwell IV
©IWM

Design

The Cromwell Mk IV was basically a Centaur III with 75 mm and Meteor engine.

Main Armament

The General Staff, on January 3, 1943, issued a policy that medium tanks were to have a large enough gun to be able to use HE rounds and still be affective with AP. A 75 mm gun was developed to use American ammunition and used many parts from the 6 pdr.

Variants

  • Cromwell IV:
  • Cromwell IVw: With welded hull and Rolls-Royce Meteor engine.

Usage

The Cromwell Mk IV started being issued to armored units in October 1943.

Specifications

  Cruiser Mk VIII, A27M, Cromwell Mk IV
Crew 5
Physical Characteristics  
Weight 61,600 lb
27,942 kg, 28,000 kg
Length w/gun 21' 0.75"
6.42 m
Length w/o gun 6.35 m
Height 8' 3"
2.49 m, 2.51 m
Width 10'
2.91 m, 3.048 m
Width over tracks  
Ground clearance 0.41 m
Ground contact length  
Ground pressure  
Turret ring diameter  
Armament  
Main 1: 75 mm OQF Mk V or VA L/40
1: 75 mm
1: 75 mm OQF
Secondary  
MG  
Side arms  
Quantity  
Main 64
Secondary  
MG  
Side arms  
Armor Thickness (mm)  
Hull Front, Upper 63@0
Hull Front, Lower 57
Hull Sides, Upper  
Hull Sides, Lower  
Hull Rear  
Hull Top  
Hull Bottom 8@90°
Turret Front  
Turret Sides  
Turret Rear  
Turret Top  
Engine (Make / Model) Meteor
Bore / stroke  
Cooling  
Cylinders  
Net HP  
Power to weight ratio  
Compression ratio  
Transmission (Type)  
Steering  
Steering ratio  
Starter  
Electrical system  
Ignition  
Fuel (Type)  
Octane  
Quantity  
Road consumption  
Cross country consumption  
Performance  
Traverse 360°
Speed - Road 32 mph, 38 mph
52 kph, 53 kph, 61 kph
Speed - Cross Country 29 kph
Range - Road 173 miles
278 km
Range - Cross Country  
Turning radius  
Elevation limits  
Fording depth 4'
1.219 m, 1.37 m
Trench crossing 7' 6"
2.286 m 2.4 m
Vertical obstacle 3'
0.91 m, 0.914 m
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 Two Tanks, George Forty, 1995
  2. The Illustrated Guide to Tanks of the World, George Forty, 2006
  3. 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
  4. Tanks of the World, 1915-1945, Peter Chamberlain, Chris Ellis, 1972
  5. The Encyclopedia of Weapons of World War II, Chris Bishop, 1998
  6. Tanks of World War II, Duncan Crow, 1979
  7. Profile AFV Weapons 25 Cromwell and Comet, Major James Bingham, 1971
  8. World War I and II Tanks, George Forty, 2012
20th Century American Military History Crucial Site