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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.1,7 In August 1941 Babcock and Wilco Ltd. received the contract for producing the welded turrets.1

The 6 pdr gun had an AP projectile weight of 6.28 lb, which could go 2,950'/sec.9

Variants

  • Churchill Mk III:
  • Churchill Mk III*: Had applique armor installed.1

Usage

First use against the enemy was at Dieppe.1

Some were supplied to the Soviet Union under Lend Lease.1

Specifications

  Churchill Mk III
Crew 48, 51,2,4,7,9
Commander, turret gunner, wireless operator, driver, hull gunner1
Physical Characteristics  
Weight 87,360 lb3,8
38.5 tons4, 39 tons1,6,10, 39.1 tons2, 43.1 tons9
39,574 kg8, 39,626 kg6,10
Length w/gun 24'9, 24.4'8, 24' 5"4,7, 25' 2"1
7.35 m2, 7.4 m8
Length w/o gun 25' 2"1
Height 8'9, 8.1'8, 8' 2"1,4,7
2.5 m8, 2.78 m2
Width Without side air louvers: 9' 2"1
10'9, 10.6'8, 10' 8"1,4,7
3.25 m2, 3.3 m8
Width over tracks 9' 1"1
Ground clearance 20"9
0.53 m2
Ground contact length 149.5"9
Ground pressure 13.1 psi9
0.92 (kg/cm2)2, 1.1 (kg/cm2)8
Turret ring diameter  
Armament  
Main 57 mm OQF 6 pdr Mk III or V
57 mm2
6 pdr4,5,7
6 pdr Mk III or Mk V OQF6,10
6 pdr (57 mm)8
6 pdr Mk IV and Mk V, L/529
6 pdr Mk III OQF L/431
6 pdr Mk V OQF L/50 (some Churchill Mk IIIs models)1
Secondary  
MG 3: MGs2
MG - anti aircraft 1: .303" Bren LMG mounted on collapsible mount on turret roof for AA, most often stored inside turret1
MG - coaxial 7.92 mm Besa MG1,7,9
2: 7.92 mm Besa8
MG - hull 7.92 mm Besa MG1,7,9
Side arms 2" bomb thrower in turret roof1
Verey pistol1
Thompson1
Hand grenades1
Quantity  
Main 309, 678, 742, 841
Secondary  
MG 2,0008, 7,5752, 9,3509
Besa: 42 boxes (225 rounds each)1
Bren: 6 magazines (100 rounds each)1
Side arms 2" bomb thrower: 30 bombs1
Verey pistol: 20 cartridges (green, red, illuminating)1
Thompson: 23 box magazines (20 rounds each)1
Hand grenades: 61
Armor Thickness (mm) 16 - 1024,5,8
1027
Front: 3.46"9
Side: 1.5-2.5"9
Hull Front, Upper 88@20°1, 1022
Hull Front, Lower 38@70°1
Hull Sides, Upper 762, 76@90°1
Hull Sides, Lower  
Hull Rear 502, 50°@901
Hull Top 16@0°1, 192
Hull Bottom 16, 192, 20@0°1
Turret Front 3.46"9
862, 88@90°1
Turret Sides 3.46"9
762, 76@90°1
Turret Rear 762
Turret Top 192
Engine (Make / Model) Bedford2,4,7
2: Bedford8
Bedford Flat Twin Six9
Bedford Twin Six1
Bore / stroke  
Cooling Water2,8,9
Cylinders 2x62,7,8, 121,9
Capacity 1,296 cubic inches1
Net HP 3504,7,8
325@2,200 rpm2
350@2,200 rpm1,9
Power to weight ratio 8.33 bhp/ton1, 12.6 hp/ton8
Compression ratio  
Transmission (Type) Merritt Brown1,9
4 forward, 1 reverse1,2,9
Gearing ratio 1st: 6·220:11
2nd: 2·263:11
3rd: 1·176:11
4th: 0·0703:11
Reverse: 10.658:11
Steering Controlled differential9
Steering ratio  
Starter  
Electrical system 12 volt1
Ignition  
Fuel (Type) Gasoline2,8,9
Octane  
Quantity 190 gallons9
182.5 gallons1
682 liters2
Road consumption 0.85 mpg9
Cross country consumption 0.5 mpg9
Performance  
Traverse 360°
Hand, hydraulic9
24°/sec1
Speed - Road 15 mph7, 15.5 mph1,4,8, 17 mph9
25 kph8, 26.4 kph2
Speed - Cross Country 8 mph8
13 kph8
Range - Road 90 miles8, 161 miles9
144 km8, 198 km2
Range - Cross Country 96 miles9, 120 miles (with auxiliary fuel tanks)1
Turning Radius  
Elevation Limits +20° to -12.5°1
Fording depth 31.5"9, 3' 4"1, 94.5"9
0.91 m2
Trench crossing 9.2'9, 10'1,8
3 m8
Vertical Obstacle 2' 6"1, 44.5"9
Climbing ability 30° (58%) slope9
Suspension (Type) Coil Springs2
Vertical coil springs1
Sprung on triple helical springs9
Drive: rear1
Idler: front1
Wheels each side 111,8,9
Return rollers each side  
Tracks (Type) Dry pin9
Heavy cast steel1
Light cast steel and manganese1
Length  
Width 14"1, 22"9
559 mm2
Diameter 10"1
Number of links Heavy cast: 701
Light cast: 721
Pitch 8"9
Tire tread Steel2
Track centers/tread 7.25'9, 12' 6"1
Radio Wireless set No. 191

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