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Great Britain's Infantry Mk IV, A22, Churchill III

Photos

Infantry Mk IV, Churchill Mk III, A22, with the 7th Motor Brigade in North Africa at time of Alamein:
Great Britain's Infantry Mk IV, Churchill Mk III, A22, with the 7th Motor Brigade in North Africa at time of Alamein
©IWM
Infantry Mk IV, Churchill Mk III, A22 with the 142nd Suffolk Regiment in Tunis, January 1943:
Great Britain's Infantry Mk IV, Churchill Mk III, A22 with the 142nd Suffolk Regiment in Tunis, January 1943
©IWM
Infantry Mk IV, Churchill Mk III, A22, as there's a hammer and sickle emblem on this vehicle, it may have been one that ended up being shipped to Russia:
Great Britain's Infantry Mk IV, Churchill Mk III, A22, as there's a hammer and sickle emblem on this vehicle, it may have been one that ended up being shipped to Russia
©IWM
Infantry Mk IV, Churchill Mk IIIs and Mk IVs, A22. Near the River Foglia in September 1944:
Great Britain's Infantry Mk IV, Churchill Mk IIIs and Mk IVs, A22. Near the River Foglia in September 1944
©IWM

Design

Had 6 pdr installed in a new welded turret. In August 1941 Babcock and Wilco Ltd. received the contract for producing the welded turrets.

The 6 pdr gun had an AP projectile weight of 6.28 lb, which could go 2,950'/sec.

Variants

  • Churchill Mk III:
  • Churchill Mk III*: Had applique armor installed.

Usage

First use against the enemy was at Dieppe.

Some were supplied to the Soviet Union under Lend Lease.

Specifications

  Churchill Mk III
Crew 4, 5
Commander, turret gunner, wireless operator, driver, hull gunner
Physical Characteristics  
Weight 87,360 lb
38.5 tons, 39 tons, 39.1 tons, 43.1 tons
39,574 kg, 39,626 kg
Length w/gun 24', 24.4', 24' 5", 25' 2"
7.35 m, 7.4 m
Length w/o gun 25' 2"
Height 8', 8.1', 8' 2"
2.5 m, 2.78 m
Width Without side air louvers: 9' 2"
10', 10.6', 10' 8"
3.25 m, 3.3 m
Width over tracks 9' 1"
Ground clearance 20"
0.53 m
Ground contact length 149.5"
Ground pressure 13.1 psi
0.92 (kg/cm2), 1.1 (kg/cm2)
Turret ring diameter  
Armament  
Main 57 mm OQF 6 pdr Mk III or V
57 mm
6 pdr
6 pdr Mk III or Mk V OQF
6 pdr (57 mm)
6 pdr Mk IV and Mk V, L/52
6 pdr Mk III OQF L/43
6 pdr Mk V OQF L/50 (some Churchill Mk IIIs models)
Secondary  
MG 3: MGs
MG - anti aircraft 1: .303" Bren LMG mounted on collapsible mount on turret roof for AA, most often stored inside turret
MG - coaxial 7.92 mm Besa MG
2: 7.92 mm Besa
MG - hull 7.92 mm Besa MG
Side arms 2" bomb thrower in turret roof
Verey pistol
Thompson
Hand grenades
Quantity  
Main 30, 67, 74, 84
Secondary  
MG 2,000, 7,575, 9,350
Besa: 42 boxes (225 rounds each)
Bren: 6 magazines (100 rounds each)
Side arms 2" bomb thrower: 30 bombs
Verey pistol: 20 cartridges (green, red, illuminating)
Thompson: 23 box magazines (20 rounds each)
Hand grenades: 6
Armor Thickness (mm) 16 - 102
102
Front: 3.46"
Side: 1.5-2.5"
Hull Front, Upper 88@20°, 102
Hull Front, Lower 38@70°
Hull Sides, Upper 76, 76@90°
Hull Sides, Lower  
Hull Rear 50, 50°@90
Hull Top 16@0°, 19
Hull Bottom 16, 19, 20@0°
Turret Front 3.46"
86, 88@90°
Turret Sides 3.46"
76, 76@90°
Turret Rear 76
Turret Top 19
Engine (Make / Model) Bedford
2: Bedford
Bedford Flat Twin Six
Bedford Twin Six
Bore / stroke  
Cooling Water
Cylinders 2x6, 12
Capacity 1,296 cubic inches
Net HP 350
325@2,200 rpm
350@2,200 rpm
Power to weight ratio 8.33 bhp/ton, 12.6 hp/ton
Compression ratio  
Transmission (Type) Merritt Brown
4 forward, 1 reverse
Gearing ratio 1st: 6·220:1
2nd: 2·263:1
3rd: 1·176:1
4th: 0·0703:1
Reverse: 10.658:1
Steering Controlled differential
Steering ratio  
Starter  
Electrical system 12 volt
Ignition  
Fuel (Type) Gasoline
Octane  
Quantity 190 gallons
182.5 gallons
682 liters
Road consumption 0.85 mpg
Cross country consumption 0.5 mpg
Performance  
Traverse 360°
Hand, hydraulic
24°/sec
Speed - Road 15 mph, 15.5 mph, 17 mph
25 kph, 26.4 kph
Speed - Cross Country 8 mph
13 kph
Range - Road 90 miles, 161 miles
144 km, 198 km
Range - Cross Country 96 miles, 120 miles (with auxiliary fuel tanks)
Turning Radius  
Elevation Limits +20° to -12.5°
Fording depth 31.5", 3' 4", 94.5"
0.91 m
Trench crossing 9.2', 10'
3 m
Vertical Obstacle 2' 6", 44.5"
Climbing ability 30° (58%) slope
Suspension (Type) Coil Springs
Vertical coil springs
Sprung on triple helical springs
Drive: rear
Idler: front
Wheels each side 11
Return rollers each side  
Tracks (Type) Dry pin
Heavy cast steel
Light cast steel and manganese
Length  
Width 14", 22"
559 mm
Diameter 10"
Number of links Heavy cast: 70
Light cast: 72
Pitch 8"
Tire tread Steel
Track centers/tread 7.25', 12' 6"
Radio Wireless set No. 19

Sources:

  1. AFV 1, Churchill, B.I.T. Mk IV, B.T. White
  2. Panzer Truppen The Complete Guide to the Creation and Combat Employment of Germany's Tank Force 1943-1945, Thomas L. Jentz, 1996
  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. The Illustrated Guide to Tanks of the World, George Forty, 2006
  7. Tanks of World War II, Duncan Crow, 1979
  8. Battle Winning Tanks, Aircraft & Warships of World War II, David Miller, 2000
  9. Tank Data, Aberdeen Proving Grounds Series, 1968?
  10. World War I and II Tanks, George Forty, 2012
20th Century American Military History Crucial Site