World War II Vehicles, Tanks, and Airplanes logo, pictures of P-51, T-34/85, FW-190, and Churchill
wwiivehicles.com ©2013
United Kingdom' flag
Toggle Menu

Great Britain's Medium Tank A7, The 14 Tonner

Photos

Medium Tank A7:
Great Britain's Medium Tank A7
Royal Armored Corps Tank Museum 		     

Design

The Chief Superintendent of Design in 1929 designed an experimental tank, and three were constructed by the Royal Ordnance Factory in Woolwich.2,3

Development stopped in 1937.2

Production

  • Medium Tank A7E1: 13
    • Manufacturer: Royal Ordnance Factory at Woolwich3
    • Production: 19293
  • Medium Tank A7E2: 13
    • Manufacturer: Royal Ordnance Factory at Woolwich3
    • Production: 19293
  • Medium Tank A7E3:

Variants

  • Medium Tank A7E2: Changes in transmission and running gear.1 Later models had 2 pdr installed.1

Specifications

  Medium Tank A7E1 Medium Tank A7E2 Medium Tank A7E3
Crew 51,3 53 51,3
Physical Characteristics      
Weight 14 tons1,2,3 14 tons2,3 18.2 tons1,2,3
Length     22' 6"1
Height     9' 1"1
Width     8' 11.5"1
Ground clearance      
Ground contact length      
Ground pressure      
Turret ring diameter      
Armament      
Main 3 pdr QF1
3 pdr (47 mm)2,3 		3 pdr (47 mm)2,3 3 pdr QF1
3 pdr (47 mm)2,3
Secondary      
MG 2: .303 Vickers .303 MG1   2: .303 Vickers MG1
MG - coaxial 1: MG2
1: .303 Vickers MG3 		1: MG2
1: .303 Vickers MG3 		1: MG2
MG - hull 1: MG2
1: .303 Vickers MG3 		1: .303 Vickers MG3 1: MG2
Side arms      
Quantity      
Main      
Secondary      
MG      
Side arms      
Armor Thickness (mm) 9 - 141,3, 142 9 - 143, 142 141,2,3
Hull Front, Upper      
Hull Front, Lower      
Hull Sides, Upper      
Hull Sides, Lower      
Hull Rear      
Hull Top      
Hull Bottom      
Turret Front      
Turret Sides      
Turret Rear      
Turret Top      
Engine (Make / Model) Armstrong-Siddeley1,2,3 Armstrong Siddeley2,3 2: AEC C11,3
2: AEC2
Cooling Air1,2,3 Air2,3  
Cylinders V-82 V-82 63
Net HP 1201,2,3 1202,3 2521,2,3
Transmission (type) Armstrong Siddeley Indirect Drive3 Wilson Hydraulic3  
Steering Epicyclic3 Epicyclic3  
Fuel (type)     Diesel1,2
Octane      
Capacity      
Performance      
Traverse      
Speed - Road 25 mph1,3 25 mph3 25 mph1,2,3
Speed - Cross Country      
Range - Road 120 miles3 120 miles3  
Turning Radius      
Elevation Limits      
Fording depth      
Trench crossing      
Vertical Obstacle      
Suspension (Type) Leaf spring3 Single bogie with vertical volute3 Single trailing bogie with helical coil springing3
Wheels each side      
Return rollers each side 73 73  
Track length      
Tires      
Track width      
Track centers/tread      

Sources:

  1. Tanks of the World, 1915-1945, Peter Chamberlain, Chris Ellis, 1972
  2. The Royal Armoured Corps Tank Museum, Tanks 1919-1939 The Inter War Period, 1966
  3. AFV #12 Medium Marks I - III, Major-General N. W. Duncan
Find me here too:
Follow wwiivehicles on Twitter Find us on Google+