M3A4 Medium Tank
Riveted hull.1 Side doors eliminated. Due to shortage of tank engines Chrysler combined 5 car engines together to provide power.1 These were nicknamed "The Eggbeater".9 The hull was lengthened and the bogie wheels spread to accommodate the 5 engines.1
Then engines were placed in a star configuration.12
Aberdeen Tank Museum
| M3A4, Lee VI | |
|---|---|
| Crew | Commander, driver, loaders(2), gunners(2).4 64,5,10,12 |
| Physical Characteristics | |
| Weight | 27.3 tons7 64,000 lb5,10, 67,280 lb12 29,000 kg |
| Length w/gun | 19' 8"4,5,10,12 6.15 m7, 6.15-6.63 m |
| Length w/o gun | 6.15 m |
| Height | 10' 3"4,5,10,12 3.12 m7 |
| Width | 8' 11"4,5,10,12 2.64 m, 2.72 m7 |
| Width over tracks | |
| Ground clearance | 17 1/8"10,12 |
| Ground contact length | 160"10,12 |
| Ground pressure | 12.9 psi10,12, 13.36 psi |
| Turret ring diameter | 57"10 |
| Armament | |
| Main | 75 mm M2 or M34 75 mm5 75 mm M2, gyrostabilized12 |
| Secondary | 37 mm M5 or M64 37 mm5 37 mm M612 |
| MG | 3-4: .30 cal Browning MGs4 3: MG5 4: .30 cal M1919A4 MG, coaxial, cupola, fixed in hull(2)12 |
| Side arms | Hand grenades12 |
| Quantity | |
| Main | 464,12 |
| Secondary | 1784,12 |
| MG | 9,2004,12 |
| Side arms | Grendades: 1212 |
| Armor Thickness (mm) | 124, 374 1.5" - 2"5 Front: 507 Side: 377 |
| Hull Front, Upper | 2"@0°12 |
| Hull Front, Lower | |
| Hull Sides, Upper | 1.5"@0°12 |
| Hull Sides, Lower | |
| Hull Rear | 1.5"@0°12 |
| Hull Top | |
| Hull Bottom | |
| Turret Front | 2.25"@0°12 |
| Turret Sides | 2.25"@0°12 |
| Turret Rear | |
| Turret Top | |
| Engine (Make / Model) | 5: Chrysler A-57 Multibank 5,6,8,10 Chrysler A-57 Multibank12 |
| Bore / stroke | |
| Cooling | Water10,12 |
| Cylinders | 30 (5x6)10, 305,12 |
| Capacity | |
| Net HP | 3705,6,7,12 370@2,400 rpm10 |
| Power to weight ratio | |
| Compression ratio | |
| Transmission (Type) | Synchromesh12 5 forward, 1 reverse12 |
| Steering | Controlled differential12 |
| Steering ratio | |
| Starter | |
| Electrical system | |
| Ignition | |
| Fuel (Type) | Gasoline10,12 |
| Octane | 8010 |
| Quantity | 160 gallons10, 175 miles12 |
| Fuel consumption - Road | |
| Fuel consumption - Cross country | |
| Performance | |
| Traverse | 37 mm: 360°4,12, power or manual12 75 mm: 15° left, 15° right4,12 |
| Max speed | 25 mph12, 26 mph4,5,10 34 kph, 40 kph7 |
| Cross country speed | 16 mph4 |
| Road radius | 120 miles4,10,12 193 km |
| Cross country radius | |
| Turning radius | 39'10 |
| Elevation limits | 75 mm: -9° to +20°4,12 37 mm: -7° to +60°4,12 |
| Fording depth | 3' 4"4,10,12 |
| Trench crossing | 6' 2"10,12, 6' 3"4 |
| Vertical obstacle | 2'4,10,12 |
| Climbing ability | 30° slope12 |
| Suspension (Type) | 3: Vertical Volute bogies8 Vertical volute springing12 |
| Wheels each side | 3 two wheeled bogies12 |
| Return rollers each side | 312 |
| Tracks (Type) | Steel blocks with rubber pads, rubber bushed track pins12 |
| Track length | |
| Track width | 16"12, 16.5"4 |
| Number of links | 8312 |
| Pitch | 6"12 |
| Tire tread | Rubber12 |
| Track centers/tread | 81"12, 6' 11"4,10 |
Sources:
- 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
- Panzer Truppen The Complete Guide to the Creation and Combat Employment of Germany's Tank Force 1933-1942, Thomas L. Jentz, 1996
- Panzer Truppen The Complete Guide to the Creation and Combat Employment of Germany's Tank Force 1943-1945, Thomas L. Jentz, 1996
- 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
- Tanks of the World, 1915-1945, Peter Chamberlain, Chris Ellis, 1972
- The Encyclopedia of Weapons of World War II, Chris Bishop, 1998
- Jane's World War II Tanks and Fighting Vehicles The Complete Guide, Leland Ness, 2002
- Tanks of World War II, Duncan Crow, 1979
- Battle Winning Tanks, Aircraft & Warships of World War II, David Miller, 2000
- AFV 11: M3 Medium (Lee/Grant), Peter Chamberlain and Chris Ellis
- Tank Data, Aberdeen Proving Grounds Series, 1968?
- Tank Data 2, Aberdeen Proving Grounds Series, E. J. Hoffschmidt and W. H. Tantum IV, 1969
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