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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.

Specifications

  KV-1 1940
Crew 5
Physical Characteristics  
Weight 43.5 tons
Length 6.75 m
Height 2.71 m
Width 3.32 m
Width over tracks  
Ground clearance 0.45 m
Ground contact length  
Ground pressure 0.75 kg/cm2
Turret ring diameter  
Armament  
Main 76.2 mm 1939 L-11
76.2 mm F-32
Secondary  
MG 3 - 4: 7.62 mm DT MG
Side arms  
Quantity  
Main 111 - 114
Secondary  
MG 3,024
Side arms  
Armor Thickness (mm)  
Hull Front, Upper 75
Hull Front, Lower  
Hull Sides, Upper 75
Hull Sides, Lower 90
Hull Rear 60-75
Hull Top 30-40
Hull Bottom 30-40
Turret Front 90
Turret Sides 75
Turret Rear 75, 110
Turret Top 35
Engine (Make / Model) V-2, V-2K, W-2-K
Bore / stroke 4 stroke
Cooling  
Cylinders V-12
Capacity  
Net HP 600
Power to weight ratio 13.8 hp/ton
Compression ratio  
Transmission (Type)  
Steering  
Steering ratio  
Starter  
Electrical system  
Ignition  
Fuel (Type) Diesel
Octane  
Quantity 600 - 615 liters
Road consumption  
Cross country consumption  
Performance  
Traverse 360°
Speed - Road 35 kph
Speed - Cross Country  
Range - Road 335 km
Range - Cross Country  
Turning radius  
Elevation limits  
Fording depth 1.45-1.6 m
Trench crossing 2.8 m
Vertical obstacle 0.9-1.2 m
Climbing ability 36°
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 4, 5
Physical Characteristics  
Weight 43.5 tons
Length 22.3'
6.8 m
Height 8.88'
Width 10.93'
3.35 m
Width over tracks  
Ground clearance 0.52 m
Ground contact length 13.8'
Ground pressure 0.7 kg/cm2
Turret ring diameter  
Armament  
Main 76.2 mm L/41
76.2 mm M1940 L/41.5
Secondary  
MG 2: MG
3: MG
Side arms  
Quantity  
Main 111
Secondary  
MG 2,080, 3,024
Side arms  
Armor Thickness (mm)  
Hull Front, Upper 75, 110
Hull Front, Lower  
Hull Sides, Upper 75, 75 - 77
Hull Sides, Lower  
Hull Rear 75
Hull Top 35
Hull Bottom 35
Turret Front 35 - 110, 75
Turret Sides 75
Turret Rear 75
Turret Top 35
Engine (Make / Model) W-2, V-2K
Bore / stroke  
Cooling  
Cylinders 12
Capacity  
Net HP 550
Power to weight ratio  
Compression ratio  
Transmission (Type) 5 forward, 1 reverse
Steering  
Steering ratio  
Starter  
Electrical system  
Ignition  
Fuel (Type) Diesel
Octane  
Quantity 650 liters
Road consumption  
Cross country consumption  
Performance  
Traverse 360°
Speed - Road 22 mph
35 kph
Speed - Cross Country  
Range - Road 140 miles
335 km
Range - Cross Country 94 miles
200 km
Turning radius 9.5 m
Elevation limits  
Fording depth 1.45 m
Trench crossing  
Vertical obstacle  
Climbing ability  
Suspension (Type) Torsion Bars
Wheels each side 6
Return rollers each side  
Tracks (Type)  
Length  
Width 2' 3.5"
0.7 m
Diameter  
Number of links  
Pitch  
Tire tread Steel
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
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