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United States' M2A4 light tank

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M2A4 Light Tank:
United States' M2A4 Light Tank
Aberdeen Tank Museum

Design

The M2A4 Light Tank was the main production version of the series.8 Was developed at the Rock Island Arsenal.8

Standardized in 1939.1 37 mm gun mounted in the single turret.1,8 Hand traverse. Fired an 1.9 lb AP shell at a velocity of 2,900'/sec.7 The .30 cal MG filed a shell at 2,800'/sec.7 Few late production vehicles had Guiberson T1020 diesel.

Production

Was delivered in April 1940 by the American Car and Foundry Company.5

Usage

The M2A4 saw some action in the early Pacific battles in the Philippines.1 Also saw combat on Guadalcanal.5 They were plagued by ammunition shortages and shortages of spare parts. Were in service in some areas of the Pacific until 1943.

Issued to the US Marine Corps.7

Specifications

  M2A4
Crew Commander, driver, co-driver, gunner.2
42,3,4,7,8
Physical Characteristics  
Weight 11.5 tons3, 12 tons4
23,000 lb2,8, 24,125 lb7
10,433 kg8, 12,193 kg4
Length 14' 6"2,8, 14' 7"3,4,7
4.42 m8, 4.45 m4
Height 8' 2"8, 8' 2.5"3,7, 8' 3"4, 8' 8"2
2.489 m8, 2.52 m4
Width 8' 1.25"2,8, 8' 4"3,4,7
2.47 m8, 2.54 m4
Width over tracks  
Ground clearance 14.5"7
Ground contact length 97"7
Ground pressure 13.75 psi7
Turret ring diameter  
Armament  
Main 1: 37 mm3,8
1: 37 mm M57
Secondary  
MG 4: MG3
1: .50 cal
4: 7.62 mm / 0.3" MG4
MG - coaxial 1 :.30 cal MG8
MG - hull 1: .30 cal M1919A4 MG7
MG - sponsons 2: .30 cal MG8, 2:.30 cal M1919A4 MG7
MG - anti-aircraft 1: .30 cal M1919A4 MG7
Side arms  
Quantity  
Main 1032,4,8, 1047
Secondary  
MG 2,1372, 7,1848, 7,9007
Side arms  
Armor Thickness (mm) 62, 252,4
3/8" - 1"3
Front Front: 258
Front: 0.98"8
Hull Front, Upper 1"@0°7
Hull Front, Lower  
Hull Sides, Upper 1"@0°7
Hull Sides, Lower  
Hull Rear 0.375"@0°7
Hull Top  
Hull Bottom  
Turret Front 1.5"@0°7
Turret Sides 1.25"@0°7
Turret Rear  
Turret Top  
Engine (Make / Model) Continental W-6702
Continental3,4
Continental WG707
Bore / stroke  
Cooling Air3,7
Cylinders R-73,4,7
Capacity  
Net HP 2503,4,7,8
Power to weight ratio  
Compression ratio  
Transmission (Type) Manual
Syncromesh7
5 forward, 1 reverse7
Steering Controlled differential7
Steering ratio  
Starter  
Electrical system  
Ignition  
Fuel (Type) Gasoline7
Octane  
Quantity 54 gallons7
Road consumption 1.5 mpg7
Cross country consumption  
Performance  
Traverse 270°2, 360°7
Manual7
Speed - Road 25 - 30 mph2,8, 34 mph3,4, 35 mph7
40 - 48 kph8, 54,7 kph4
Speed - Cross Country 18 mph2,8, 25 mph3
29 kph8
Range - Road 78 miles7, 130 miles2,4,8
209 km4,8
Range - Cross Country  
Turning radius  
Elevation limits -10° to +20°2
Fording depth 3' 6"7, 3' 8"2
Trench crossing 6'2
Vertical obstacle 2'2
Climbing ability 26° slope7
Suspension (Type) Vertical volute2, Vertical volute spring7
Wheels each side 2 double wheel bogies7
Return rollers each side 27
Tracks (Type) Steel rubber bushed pins, rubber pads7
Length  
Width 7 5/8"2,8, 11 5/8"7
0.1937 m8
Diameter  
Number of links 667
Pitch 5.5"7
Tire tread Rubber7
Track centers/tread 6' 1"2,7,8
1.854 m8

Sources:

  1. The Encyclopedia of Tanks and Armored Fighting Vehicles - The Comprehensive Guide to Over 900 Armored Fighting Vehicles From 1915 to the Present Day, General Editor: Christopher F. Foss, 2002
  2. 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
  3. Tanks of the World, 1915-1945, Peter Chamberlain, Chris Ellis, 1972
  4. World War I and II Tanks, George Forty, 2012
  5. Tanks of World War II, Duncan Crow, 1979
  6. Tank Data, Aberdeen Proving Grounds Series, 1968?
  7. Tank Data 2, Aberdeen Proving Grounds Series, E. J. Hoffschmidt and W. H. Tantum IV, 1969
  8. Airfix Magazine Guide #26 American Tanks of World War 2, Terry Gander and Peter Chamberlain, 1977
20th Century American Military History Crucial Site