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United States' M3A3 medium tank

Photos

M3A3 Medium Tank:
United States' M3 Medium Tank
U.S. Ordnance Dept.
M3A3 Medium Tank:
United States' M3A3 Medium Tank
Aberdeen Tank Museum

Design

All welded hull with 2 diesel engines.1,2,8 Side doors welded or eliminated.

Specifications

  M3A3 medium tank, Lee IV, Lee V
Crew Commander, driver, loaders(2), gunners(2).4
62,3,4,5,7
Radio SCR-5082
Radio - command SCR-5062
Physical Characteristics  
Weight 63,000 lb2,5,7, 66,480 lb3
27,900 kg
Length 18' 6"2,3,4,5,7
5.64-6.12 m
Height 10' 3"2,3,4,5,7
3.12 m
Width 8' 11"2,3,4,5,7
2.72 m
Width over tracks  
Ground clearance 17 1/8"2,3,7
Ground contact length 147"2,3,7
Ground pressure 12.9 psi, 13.25 psi3, 13.36 psi2,7
Turret ring diameter 57"2,7
Armament  
Main 75 mm M22,4
75 mm5
75 mm M2, gyrostabilized3
OR 75 mm M32,4
Secondary 37 mm M52,4
37 mm5
OR 37 mm M62,3,4
MG 3-4: .30 cal Browning MGs4
3: MG5
MG - cupola 1: .30 cal M1919A4 MG3
1: .30 cal Browning M1919A4 MG2
MG - coaxial 1: .30 cal M1919A4 MG3
1: .30 cal Browning M1919A4 MG2
MG - hull 1: .30 cal Browning M1919A4 MG2
Side arms .45 cal submachine gun2
Hand grenades2,3
Quantity  
Main 462,3,4
Secondary 1782,3,4
MG 9,2002,3,4
Side arms .45 cal: 1,2002
Grenades: 122,3
Armor Thickness (mm) 124, 374
1.5" - 2"5
Hull Front, Upper 2"2, 2"@0°3
Hull Front, Lower 1.5"2
Hull Sides, Upper 1.5"2, 1.5"@0°3
Hull Sides, Lower 1.5"2
Hull Rear 1.5"2, 1.5"@0°3
Hull Top 0.5"2
Hull Bottom 0.5" - 1"2
Turret Front 2.25"2, 2.25"@0°3
Turret Sides 2.25"2, 2.25"@0°3
Turret Rear 2.25"2
Turret Top 7/8"2
Engine (Make / Model) Twin GM 6-715,6, 2: General Motors 6-718, 2: GM 6-71 60462,3,7, 2: General Electric2
Bore / stroke  
Cooling Liquid2, Water3,7
Cylinders 12 (6x2)7, 125, I-122,3
Capacity  
Net HP 3703, 3755,6, 375@2,100 rpm2,7
Power to weight ratio  
Compression ratio  
Transmission (Type) Synchromesh2,3
5 forward, 1 reverse2,3
Steering Controlled differential3
Steering ratio  
Starter  
Electrical system 24 volt2
Ignition  
Gear ratio - 1st gear 7.56:12
- 2nd gear 3.11:12
- 3rd gear 1.78:12
- 4th gear 1.11:12
- 5th gear 0.73:12
- Reverse gear 5.65:12
Fuel (Type) Diesel2,3,5,6,7,8
Octane 502,7
Quantity 150 gallons2,3,7
673 liters
Fuel consumption - Road  
Fuel consumption - Cross country  
Performance  
Traverse 37 mm: 360°2,3,4, power or manual3
75 mm: 15° left, 15° right2,3,4
Speed - Road 26 mph3,4, 29 mph2,5,7
40 kph
Speed - Cross Country 16 mph4
Range - Road 160 miles2,3,4,7
241 km
Range - Cross Country  
Turning radius 37'2,7
18.9 m
Elevation limits 75 mm: -9° to +20°2,3,4
37 mm: -7° to +60°2,3,4
Fording depth 3'2,3,4,7
Trench crossing 6.2'2, 6' 2"3,7, 6' 3"4
Vertical obstacle 2'2,3,4,7
Climbing ability 30° slope3, 60%2
Suspension (Type) 3: Vertical Volute bogies8
Vertical volute springing2,3
Wheels each side 3 two wheeled bogies3
Wheel size 20" x 9"2
Wheel size - idler 22" x 9"2
Return rollers each side 33
Tracks (Type) Steel blocks with rubber pads, rubber bushed track pins3, Rubber block2
Track length  
Track width 16"3, 16.5"4, 16 9/16"2
Number of links 792,3
Pitch 6"2,3
Tire tread Rubber3
Track centers/tread 81"3, 6' 11"2,4,7

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. The American Arsenal, 1996
  3. Tank Data 2, Aberdeen Proving Grounds Series, E. J. Hoffschmidt and W. H. Tantum IV, 1969
  4. 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
  5. Tanks of the World, 1915-1945, Peter Chamberlain, Chris Ellis, 1972
  6. The Encyclopedia of Weapons of World War II, Chris Bishop, 1998
  7. AFV 11: M3 Medium (Lee/Grant), Peter Chamberlain and Chris Ellis
  8. Tanks of World War II, Duncan Crow, 1979
20th Century American Military History Crucial Site