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Soviet Union's BT-4 Bystrochodnij Tankov (Fast Tank)

Design

Built with solid disc wheels.2

Had 2 machine gun turrets and was intended for infantry support.

Intended as a commander's tank with radio equipment in the left turret.1

Steering on wheels was by a wheel that controlled the front wheels.1 On tracks, it was steered by the clutch and brake.1

Variants

  • BT-4: Two machine guns/ DT machine guns4 in gun turrets.3
  • SU-1: Was to have a 76.2 mm cannon in a self propelled gun mount.3

Usage

The BT-4 was to be used for infantry support.3

Specifications

  BT-44
Crew 31
Physical Characteristics  
Weight 10.2 tons1
Length 18'1
Height 7.25'1
Width 7.33'1
Width over tracks  
Ground clearance - wheels 9"1
Ground clearance - tracks 10.5"1
Ground contact length 12'1
Ground pressure 8.96 psi1
Turret ring diameter  
Armament  
Main Left turret: 27 mm1
47 mm2
Secondary Right turret: 7.62 mm DTMG1
MG  
Side arms  
Quantity  
Main 1801
Secondary 2,7091
MG  
Side arms  
Armor Thickness (mm)  
Hull Front, Upper 132
Hull Front, Lower  
Hull Sides, Upper 10 - 132
Hull Sides, Lower  
Hull Rear 102
Hull Top 6 - 102
Hull Bottom 6 - 102
Turret Front 132
Turret Sides 132
Turret Rear 132
Turret Top 102
Engine (Make / Model) Liberty Aero1
Bore / stroke  
Cooling Water1
Cylinders V-121
Capacity  
Net HP 343 - 400@2,000 rpm1
Power to weight ratio 34.3 hp/ton1
Compression ratio  
Transmission (Type) Wheels: Chain drive1
Tracks: Sliding gear1
Steering  
Steering ratio  
Starter  
Electrical system  
Ignition  
Fuel (Type) Gasoline1
Octane  
Quantity 88 gallons1
Road consumption  
Cross country consumption  
Performance  
Traverse 265°1
Max speed - wheels 69 mph1
Cross country speed - tracks 39 mph1
Road radius - wheels 180 miles1
Cross country radius - tracks 125 miles1
Turning radius 40'1
Elevation limits -5° to +25°1
Fording depth 3.98'1
Trench crossing 6.85'1
Vertical obstacle 8"1
Vertical obstacle - tracks 29.8"1
Climbing ability  
Suspension (Type) Christie independent type1
Wheels each side  
Return rollers each side  
Tracks (Type)  
Length  
Width - tire 2 x 3.95"1
Width - track 10.25"1
Diameter 32.5"1
Number of links  
Pitch  
Tire tread  
Track centers/tread 6.33'1

Sources:

  1. Profile AFV Weapons 37 Russian BT Series, John F. Milsom, 1971
  2. The Illustrated Guide to Tanks of the World, George Forty, 2006
  3. Russian Tanks and Armored Vehicles 1917-1945, by Wolfgang Fleischer, 1999
  4. Russian Tanks of World War II Stalin's Armored Might, by Tim Bean & Will Fowler, 2002
20th Century American Military History Crucial Site