Poland's Czolg lekki 7TP (7 ton) light tank

Photos

7 TP light tank:
Poland's 7TP Light Tank
7 TP light tank:
Poland's 7TP Light Tank
7 TP light tank:
Poland's 7TP Light Tank
7 TP light tank:
Poland's 7TP Light Tank

Design

The PZI design bureau was given the task to figure out a way to make a Polish made copy of the British Vickers-Armstrong 6-ton tank.2,3 It was a 9 ton vehicle with a twin turret.2

Engine

A Saurer engine was installed making the 7 TP the first diesel powered tank to be in production.2

Production

  • 7 TP: 132, 1704
    • Manufacturer: PZI2
    • Production: 1934 - 19392
  • 7TP dw: 24 twin turret
  • 7TP twin turret: 245
    • Production: 1935 - 19365
  • 7TP (Improved), 7TP 3: 1603
    • Production: 1937 - ?3

Variants

  • 7TP dw, 7TP: These models had twin turrets.4 Browning, Hotchkiss, and Maxim were different machine guns that were trialed.3
  • 7TP jw, 7TP 2: Made with single turret which was built in Sweden.4
  • 7TP (Improved), 7TP 3: Had new turret, thicker armor (40 mm), and a strong suspension. This did not enter production.

Usage

Used by the 10th Mechanized Brigade against the German 4th Panzer Division's advance on Krakow.5

German Usage

Used for police, anti-partisan, and tractor duties.

Specifications

  7TP dw, 7TP
Crew 32,3,5
Physical Characteristics  
Weight 6 tons2, 9.25 tons5, 9.4 tons3
9,000 kg, 9,550 kg3
Length 14' 11"5, 15' 1"2
4.56 m5
Height 7' 0.5"2, 7' 2"5
2.19 m5
Width 7' 11"2,5
2.43 m5
Ground clearance  
Ground contact length  
Ground pressure (psi)  
Turret ring diameter  
Armament  
Main 2: 7.92 MG2
2 (1 in each turret): 7.92 mm Ckm wz.30 MG5
2 (1 in each turret): 7.92 mm MG3
Secondary  
MG  
Side arms  
Quantity  
Main  
Secondary  
MG  
Side arms  
Armor Thickness (mm) 172
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) Saurer3, Saurer VBLDd5
Cylinders 62,3
Net HP 1102,3,5
Transmission  
Fuel type Diesel2,3,5
Octane  
Capacity  
Performance  
Traverse  
Speed - Road 19.9 mph2, 23 mph5
37 kph5
Speed - Cross Country  
Range - Road 99.42 miles5
160 km5
Range - Cross Country  
Turning Radius  
Elevation Limits  
Fording depth  
Trench crossing  
Vertical Obstacle  
Suspension (Type)  
Wheels each side  
Return rollers each side  
Track length  
Tires  
Track width  
Track centers/tread  
  7TP jw, 7TP 2
Crew Commander, gunner, driver
31,5
Physical Characteristics  
Weight 21,000 lb, 21,056 lb, 24,251 lb
9,571 kg, 11,000 kg, 9,550 kg1
9.4 tons1, 9.5 tons4, 9.74 tons5
Length 14' 11"5, 15'4, 15' 1"1, 16'
4.56 m5, 4.57 m, 4.6 m1
Height 6' 7"1, 7', 7' 2"4, 7' 6"5, 7' 6.5"
2.13 m, 2.02 m1, 2.3 m5
Width 7' 1"1, 7' 11"4,5, 7' 11.5, 8'
2.43 m5, 2.16 m1
Ground clearance  
Ground contact length  
Ground pressure (psi)  
Turret ring diameter  
Armament  
Main 37 mm1
37 mm Bofors wz.375
37 mm Bofors3,4
Secondary  
MG 7.92 mm MG1
7.92 mm wz 30 Browning
MG - coaxial 1: 7.92 mm Ckm wz.305
Side arms  
Quantity  
Main 80
Secondary  
MG 3,960
Side arms  
Armor Thickness (mm) 5-171
Min: 254
Max: 404
Hull Front, Upper 17
Hull Front, Lower  
Hull Sides, Upper  
Hull Sides, Lower  
Hull Rear  
Hull Top  
Hull Bottom 5
Turret Front 40
Turret Sides  
Turret Rear  
Turret Top  
Engine (Make / Model) Saurer VBLDd5, Saurer1
Cylinders 61
Net HP 1101,4,5
Transmission  
Fuel type Diesel1,4,5
Octane  
Capacity  
Performance  
Traverse 360°
Speed - Road 20 mph1, 23 mph5
32 kph1, 37 kph5
Speed - Cross Country  
Range - Road 99 miles5, 100 miles1,4
160 km1,5
Range - Cross Country  
Turning Radius  
Elevation Limits  
Fording depth  
Trench crossing 6', 10'
3.12 m
Vertical Obstacle 2'
Suspension (Type) 2 pairs of twin bogies on rocker with leaf springing4
Wheels each side  
Return rollers each side  
Track length  
Tires  
Track width  
Track centers/tread  
  7TP Improved, 7TP 3
Crew 32,3
Physical Characteristics  
Weight 11 tons2,3
11,177 kg3
Length 15' 1"3
4.6 m3
Height 6' 7.5"3
2.02 m3
Width 7' 1"3
2.16 m3
Ground clearance  
Ground contact length  
Ground pressure (psi)  
Turret ring diameter  
Armament  
Main 1: 37 mm antitank gun3
Secondary  
MG 1 or 2: 7.92 mm MG3
Side arms  
Quantity  
Main  
Secondary  
MG  
Side arms  
Armor Thickness (mm) 173, 402
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) Saurer3
Cylinders 62,3
Net HP 1102,3
Transmission  
Fuel type Diesel2,3
Octane  
Capacity  
Performance  
Traverse  
Speed - Road 19.9 mph3
32 kph3
Speed - Cross Country  
Range - Road 99.4 miles3
160 km3
Range - Cross Country  
Turning Radius  
Elevation Limits  
Fording depth  
Trench crossing  
Vertical Obstacle  
Suspension (Type)  
Wheels each side  
Return rollers each side  
Track length  
Tires  
Track width  
Track centers/tread  

Sources:

  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. Tanks of the World, 1915-1945, Peter Chamberlain, Chris Ellis, 1972
  3. World War I and II Tanks, George Forty, 2012
  4. Tanks of World War II, Duncan Crow, 1979
  5. Western Allied Tanks 1939-45, David Porter, 2009
20th Century American Military History Crucial Site