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Soviet Union's KV-1 Model 1940 heavy tank,
KV-1A heavy tank:

Produced in 1940. Longer L/41.5 76.2 mm gun installed in a new cast cradle and mantlet. The turret had armor plates that were welded together. The 76.2 mm shells were improved. Had all steel bogie wheels.

  KV-1 19402 KV-1A
Crew 52 44, 512
Physical Characteristics    
Weight 43.5 tons2 43.5 tons4,12
Length w/gun 6.75 m2 22.3'12
6.8 m4
Length w/o gun    
Height 2.71 m2 8.88'12
Width 3.32 m2 10.93'12
3.35 m4
Width over tracks    
Ground clearance 0.45 m2 0.52 m4
Ground contact length   13.8'12
Ground pressure 0.75 kg/cm2 2 0.7 kg/cm2 4
Turret ring diameter    
Armament    
Main 76.2 mm 1939 L-112
76.2 mm 1940 F-227
76.2 mm L/414
76.2 mm M1940 L/41.512
Secondary    
MG 3 - 4: 7.62 mm DT MG2 2: MG4
3: MG12
Side arms    
Quantity    
Main 111 - 1142 1114,12
Secondary    
MG 3,0242 2,0804, 3,02412
Side arms    
Armor Thickness (mm)    
Hull Front, Upper 752 754, 11012
Hull Front, Lower    
Hull Sides, Upper 752 754, 75 - 7712
Hull Sides, Lower 90  
Hull Rear 60-752 754
Hull Top 30-402 354,12
Hull Bottom 30-402 354,12
Turret Front 902 35 - 11012, 754
Turret Sides 752 754
Turret Rear 752, 110 754
Turret Top 352 354
Engine (Make / Model) V-2K6, W-2-K2 W-24, V-2K12
Bore / stroke 4 stroke2  
Cooling    
Cylinders V-122 1212
Capacity    
Net HP   55012
Power to weight ratio 13.8 hp/ton2  
Compression ratio    
Transmission (Type)   5 forward, 1 reverse4
Steering    
Steering ratio    
Starter    
Electrical system    
Ignition    
Fuel (Type) Diesel2,6 Diesel12
Octane    
Quantity 600 - 615 liters2 650 liters4
Road consumption    
Cross country consumption    
Performance    
Traverse 360° 360°
Max speed 35 kph2 22 mph12
35 kph4
Cross country speed    
Road radius 335 km2 140 miles12
335 km4
Cross country radius   94 miles12
200 km4
Turning radius   9.5 m4
Elevation limits    
Fording depth 1.45-1.6 m2 1.45 m4
Trench crossing 2.8 m2  
Vertical obstacle 0.9-1.2 m2  
Climbing ability 36°2  
Suspension (Type)   Torsion Bars4
Wheels each side   64
Return rollers each side    
Tracks (Type)    
Length    
Width   2' 3.5"12
0.7 m4
Diameter    
Number of links    
Pitch    
Tire tread   Steel4
Track centers/tread    

Sources:

  1. Russian Tanks of World War II Stalin's Armored Might, by Tim Bean & Will Fowler, 2002
  2. Russian Tanks and Armored Vehicles 1917-1945, by Wolfgang Fleischer, 1999
  3. 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
  4. Panzer Truppen The Complete Guide to the Creation and Combat Employment of Germany's Tank Force 1933-1942, Thomas L. Jentz, 1996
  5. Panzer Truppen The Complete Guide to the Creation and Combat Employment of Germany's Tank Force 1943-1945, Thomas L. Jentz, 1996
  6. Tanks of the World, 1915-1945, Peter Chamberlain, Chris Ellis, 1972
  7. Jane's World War II Tanks and Fighting Vehicles The Complete Guide, Leland Ness, 2002
  8. Tanks of World War II, Duncan Crow, 1979
  9. Battle Winning Tanks, Aircraft & Warships of World War II, David Miller, 2000
  10. Tank Data, Aberdeen Proving Grounds Series, 1968?
  11. The Illustrated Guide to Tanks of the World, George Forty, 2006
  12. Airfix Magazine Guide 22 Russian Tanks of World War 2, John Milsom and Steve Zaloga, 1977
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