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

Design

The KV-1A was produced in 1940. It had a longer L/41.5 76.2 mm gun installed in a new cast cradle and mantlet. The 76.2 mm shells were improved. Had all steel bogie wheels.

Armor

The turret had armor plates that were welded together. The turret had 1.3" / 35 mm plates bolted on to increase its thickness.1

Specifications

  KV-1 1940
Crew 52
Physical Characteristics  
Weight 43.5 tons2
Length 6.75 m2
Height 2.71 m2
Width 3.32 m2
Width over tracks  
Ground clearance 0.45 m2
Ground contact length  
Ground pressure 0.75 kg/cm2 2
Turret ring diameter  
Armament  
Main 76.2 mm 1939 L-112
76.2 mm F-321
Secondary  
MG 3 - 4: 7.62 mm DT MG2
Side arms  
Quantity  
Main 111 - 1142
Secondary  
MG 3,0242
Side arms  
Armor Thickness (mm)  
Hull Front, Upper 752
Hull Front, Lower  
Hull Sides, Upper 752
Hull Sides, Lower 90
Hull Rear 60-752
Hull Top 30-402
Hull Bottom 30-402
Turret Front 902
Turret Sides 752
Turret Rear 752, 110
Turret Top 352
Engine (Make / Model) V-21, V-2K5, W-2-K2
Bore / stroke 4 stroke2
Cooling  
Cylinders V-122
Capacity  
Net HP 6001
Power to weight ratio 13.8 hp/ton2
Compression ratio  
Transmission (Type)  
Steering  
Steering ratio  
Starter  
Electrical system  
Ignition  
Fuel (Type) Diesel2,5
Octane  
Quantity 600 - 615 liters2
Road consumption  
Cross country consumption  
Performance  
Traverse 360°
Speed - Road 35 kph2
Speed - Cross Country  
Range - Road 335 km2
Range - Cross Country  
Turning radius  
Elevation limits  
Fording depth 1.45-1.6 m2
Trench crossing 2.8 m2
Vertical obstacle 0.9-1.2 m2
Climbing ability 36°2
Suspension (Type)  
Wheels each side  
Return rollers each side  
Tracks (Type)  
Length  
Width  
Diameter  
Number of links  
Pitch  
Tire tread  
Track centers/tread  
  KV-1A
Crew 44, 53
Physical Characteristics  
Weight 43.5 tons3,4
Length 22.3'3
6.8 m4
Height 8.88'3
Width 10.93'3
3.35 m4
Width over tracks  
Ground clearance 0.52 m4
Ground contact length 13.8'3
Ground pressure 0.7 kg/cm2 4
Turret ring diameter  
Armament  
Main 76.2 mm L/414
76.2 mm M1940 L/41.53,6
Secondary  
MG 2: MG4
3: MG3
Side arms  
Quantity  
Main 1113,4
Secondary  
MG 2,0804, 3,0243
Side arms  
Armor Thickness (mm)  
Hull Front, Upper 754, 1103
Hull Front, Lower  
Hull Sides, Upper 754, 75 - 773
Hull Sides, Lower  
Hull Rear 754
Hull Top 353,4
Hull Bottom 353,4
Turret Front 35 - 1103, 754
Turret Sides 754
Turret Rear 754
Turret Top 354
Engine (Make / Model) W-24, V-2K3
Bore / stroke  
Cooling  
Cylinders 123
Capacity  
Net HP 5503
Power to weight ratio  
Compression ratio  
Transmission (Type) 5 forward, 1 reverse4
Steering  
Steering ratio  
Starter  
Electrical system  
Ignition  
Fuel (Type) Diesel3
Octane  
Quantity 650 liters4
Road consumption  
Cross country consumption  
Performance  
Traverse 360°
Speed - Road 22 mph3
35 kph4
Speed - Cross Country  
Range - Road 140 miles3
335 km4
Range - Cross Country 94 miles3
200 km4
Turning radius 9.5 m4
Elevation limits  
Fording depth 1.45 m4
Trench crossing  
Vertical obstacle  
Climbing ability  
Suspension (Type) Torsion Bars4
Wheels each side 64
Return rollers each side  
Tracks (Type)  
Length  
Width 2' 3.5"3
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. Airfix Magazine Guide 22 Russian Tanks of World War 2, John Milsom and Steve Zaloga, 1977
  4. Panzer Truppen The Complete Guide to the Creation and Combat Employment of Germany's Tank Force 1933-1942, Thomas L. Jentz, 1996
  5. Tanks of the World, 1915-1945, Peter Chamberlain, Chris Ellis, 1972
  6. World War I and II Tanks, George Forty, 2012
20th Century American Military History Crucial Site