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United States' Christie M1931 / T-3 medium tank


Christie M1931 medium tank:


Christie was promised a cash reward if he produced a practical tank.1 Even after a failed test seven were ordered in June 1931.1

Christie rebuilt the M1928 (T3 Medium) and added a turret.1 Engine cooling was found to be inadequate in testing.1


  • Christie M1931 medium tank:
    • Manufacturer: US Wheel Track Layer Corporation1


Soviet Union

The Soviet Union purchased two of the M1931 tanks and they were the genesis of the BT series of tanks.3

Great Britain

The Cruiser series of British tanks were based on the M1931 Christie design.3


  Christie M1931 medium tank
Crew 21,3
Physical Characteristics  
Weight 10.5 tons1,3
10,668 kg1,3
Length 17' 10"1,3
5.43 m1,3
Height 7' 3"3, 9' 3"1
2.21 m1,3
Width 7' 4"1,3
2.24 m1,3
Ground clearance  
Ground contact length  
Ground pressure  
Turret ring diameter  
Main 1: 37 mm1,3
MG 1: 7.72 mm MG
1: 7.62 mm / 0.3" MG3
Side arms  
Side arms  
Armor Thickness (mm) 161,3
Hull Front, Upper  
Hull Front, Lower  
Hull Sides, Upper  
Hull Sides, Lower  
Hull Rear  
Hull Top  
Hull Bottom  
Turret Front  
Turret Sides  
Turret Rear  
Turret Top  
Engine (Make / Model) Liberty1,3
Cylinders 123
HP 3383
Fuel (Type) Gasoline3
Max speed - wheels 46 mph1, 70 mph3
74 kph1, 113 kph3
80 kph with RPM regulator2
113 kph without RPM regulator2
Max speed - tracks 40 mph3
48 kph with RPM regulator2
64 kph without RPM regulator2, 64 kph3
Speed - Cross Country  
Range - Road 170 miles3
274 km3
Range - Road - wheels 250 miles1
402 km1
Range - Road - tracks 170 miles1
274 km1
Turning Radius  
Elevation Limits  
Fording depth  
Trench crossing  
Vertical Obstacle  
Suspension (Type)  
Wheels each side  
Return rollers each side  
Track length  
Track width  
Track centers/tread  


  1. 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
  2. Heigl's Taschenbuch der Tanks, 1935
  3. World War I and II Tanks, George Forty, 2012
20th Century American Military History Crucial Site