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United States' M3A5 medium tank

Photos

M3A5 Medium Tank:
United States' M3A5 Medium Tank
Aberdeen Tank Museum
M3A5 Medium Tank:
United States' M3A5 Medium Tank
Aberdeen Tank Museum
M3A5 Medium Tank drawing:
United States' M3A5 Medium Tank, drawing
Aberdeen Tank Museum

Design

Riveted hull.1,2,6,8 Late production models had longer M3 75mm gun.

The 37 mm gun could fire a 1.91 lb shell at a muzzle velocity of 2,600'/sec.6 The 75 mm gun could fire a 14.4 lb shell at 1,850'/sec.6 The 75 mm gun's stabilizer was made by Westinghouse.6

Specifications

  M3A5 medium tank, Grant II
Crew Commander, driver, loaders(2), gunners(2).4
62,3,4,5,6,7
Radio SCR-5082
Radio - command SCR-5062
Physical Characteristics  
Weight 32.5 tons6
64,000 lb5,7, 65,000 lb3
Length 18' 6"2,3,4,5,6,7
Height 10' 3"2,3,4,5,6,7
Width 8' 11"2,3,4,5,7, 8.95'6
Width over tracks  
Ground clearance 17 1/8"2,3,7, 17.1"6
Ground contact length 147"2,3,6,7
Ground pressure 12.9 psi, 12.25 psi3, 13.36 psi2,7, 13.6 psi6
Turret ring diameter 57"2,7
Armament  
Main 75 mm M24
75 mm5
75 mm M2, L/316
75 mm M2, gyrostabilized3
OR 75 mm M32,4
Secondary 37 mm M54
37 mm5
37 mm M6, L/536
OR 37 mm M62,3,4
MG 3-4: .30 cal Browning MGs4
3: MG5
3: .30 cal MGs6
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
2: .30 cal M1919A4 MG3
Side arms .45 cal submachine gun2
Hand grenades2,3
Quantity  
Main 462,3,4,6
Secondary 1782,3,4,6
MG 9,2002,3,4,6
Side arms .45 cal: 1,2002
Grenades: 122,3
Armor Thickness (mm) 124, 374
1.5" - 2"5
Front: 2"6
Side: 1.5"6
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"6, 2.25"2, 2.25"@0°3
Mantlet: 1"6
Turret Sides 2"6, 2.25"2, 2.25"@0°3
Turret Rear 2.25"2
Turret Top 7/8"2
Engine (Make / Model) Twin GM 6-715, Twin GM 6-71 60462,3,7, GM 6
Bore / stroke  
Cooling Liquid2, Water3,6,7
Cylinders 2x66, 12 (6x2)7, 125, I-122,3
Capacity  
Net HP 3753,5, 375@2,100 rpm2, 375@2,100 rpm7, 420@2,000 rpm6
Power to weight ratio  
Compression ratio  
Transmission (Type) Synchromesh2,3,6
5 forward, 1 reverse2,3,6
Steering Controlled differential3,6
Steering ratio  
Starter Electric6
Electrical system 24-volt2,6
Ignition Injection6
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) Diesel2,3,6,7
Octane 502,7
Quantity 174 gallons6, 175 gallons2,3,7
796 liters
Fuel consumption - Road 0.7 mpg6
Fuel consumption - Cross country  
Performance  
Traverse 37 mm: 360°2,3,4
75 mm: 15° left, 15° right2,3,4
Hydraulic or manual6, Manual or power3
Speed - Road 25 mph6, 26 mph4, 29 mph2,5,7, 30 mph3
40 kph
Speed - Cross Country 4 - 20 mph6, 16 mph4
Range - Road 120 miles6, 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' 4"2,3,4,6,7
Trench crossing 6'6, 6.2'2, 6' 2"3,7, 6' 3"4
Vertical obstacle 2'2,3,4,6,7
Climbing ability 30° slope3, 31° (60%) slope6, 60%2
Suspension (Type) 3: Vertical Volute bogies8
3: two-wheeled bogies on vertical volute springs6
Vertical volute springing2,3
Wheels each side 2x36
3 two wheeled bogies3
Wheel size 20" x 9"2
Wheel size - idler 22" x 9"2
Return rollers each side 33,6
Wheel size 20" x 9"2
Wheel size - idler 22" x 9"2
Tracks (Type) Rubber block, rubber bushed, double pin shoe6
Steel blocks with rubber pads, rubber bushed track pins3
Track length  
Track width 16"3,6, 16.5"4, 16 9/16"2
Number of links 792,3,6
Pitch 6"2,3,6
Tire tread Rubber3,6
Track centers/tread 6.9'6, 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. Tank Data, Aberdeen Proving Grounds Series, 1968?
  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