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Soviet Union's Tankette T-27

Photos

T-27 suspended under a TB-3 aircraft3:
Soviet Union's T-27 suspended under a TB-3 aircraft
T-27A3 tankette:
Soviet Union's T-27A Tankette
T-27B3 tankette:
Soviet T-27B Tankette

Design

The T-27 was based on the British Carden-Loyd Mk VI.4,5 It was designed by N. Kosyrev.5,6 The work was done at the Zavod Nr 37 in Moscow.6

The small size required that the crew be usually comprised of men that had a small stature.4

Communicated via flag.3,6

Crew

The commander and the driver sat side by side.5 The commander operated the air cooled 7.62 mm MG.5

Improvements

Starting in 1932 the T-27 was modified by having the fighting compartment lengthened which resulted in the addition of a pair of roadwheels on each side.5

The separate hatches for the crew were connected that allowed for them to open over the whole width of the T-27.5

The armor plate was extended to cover the tracks and this allowed for additional storage.5

The engine was placed between the driver and the commander.5

Prototype

The prototype was finished in 1931.4

Production

An order for 5,000 T-27s was originally placed.5

  • T-27: 2,5401, 2,5415
    • Production: 1931 - 19335, ? - 19411
      • 1931: 3485
      • 1932: 1,6835
      • 1933: 5005
  • T-27A: 3484
  • T-27B: 2,5004

Production Problems

In February 1938 the T-27s were to get an overhaul.5 During the inspection of the T-27s it was found that eight had only cast steel and not the chrome nickel steel in the rest of the models.5 The cast steel would let small arms fire penetrate.5

Variants

  • T-276: No radio.6
  • T-27A:
  • T-27B:
  • T-27V: Commander's version with radio.3

Usage

65 battalions contained 50 T-27s in each.6

Most of the T-27 were converted to training, artillery, or ammunition tractors once declared obsolete.4

Support for Paratroops

In 1931 experiments were made by hanging a T-27 under the tails of TB-1 bombers so that they could be landed and unloaded for use with paratroopers.5

Specifications

  T-27 Tankette
Crew Commander5, driver5
21,2,3,4,5
Physical Characteristics  
Weight 1.7 tons1,2,3, 2.7 tons4,5
1,727 kg1
Length w/gun 7' 6"1,3, 8.5'2
2.29 m1, 2.6 m5
Length w/o gun 7' 6"3
Height 3' 7"1, 3.6'3, 4.5'2
1.1 m1, 1.44 m5
Width 5' 1"1,5.1'3, 6'2
1.55 m1, 1.63 m5
Width over tracks 5'3
Ground clearance 9.5"3
0.24 m5
Ground contact length 4' 6"3
Ground pressure 8.6 psi3
0.75 kp/cm2 5
Turret ring diameter  
Armament  
Main 7.62 DT MG1,3,5
7.62 MG2,4
Secondary  
MG  
Side arms  
Quantity  
Main 2,5203,5
Secondary  
MG  
Side arms  
Armor Thickness (mm) 4 - 9 2, 91, 6 - 104
Turret: 93
Hull Front, Upper 93, 105
Hull Front, Lower  
Hull Sides, Upper 93, 105
Hull Sides, Lower  
Hull Rear 83, 105
Hull Top 63,5
Hull Bottom 43,5
Engine (Make / Model) GAZ AA1,5
GAZ (Ford) AA3
Bore / stroke 4 stroke5
Cooling Water3
Cylinders 41,3,5
Capacity  
Net HP 22@170 rpm1, 22@1,700 rpm3, 222 , 40@2,200 rpm5
Power to weight ratio 11.93, 14.7 HP/ton5
Compression ratio  
Transmission (Type) Epicyclic3
3 forward, 1 reverse3
Steering Clutch and brake3
Steering ratio  
Starter  
Electrical system  
Ignition  
Fuel (Type) Gasoline2,3,5
Octane  
Quantity 8 gallons3
46 liters5
Road consumption  
Cross country consumption  
Performance  
Traverse 20°3
Speed - Road 28 mph1,2,3
40 kph4,5, 45 kph1
Speed - Cross Country 20 mph3
Range - Road 100 miles1,3
80 km5, 85 km5, 161 km1
Range - Cross Country 42 miles3
Turning radius 12'3
Elevation limits -10° to +10°3
Fording depth 1.8'3
0.5 m5
Trench crossing 3.75'3
1.2 m5
Vertical obstacle 1.25'3
0.5 m5
Climbing ability 40°5, 49°3
Suspension (Type) Vickers-Carden-Loyd3
Wheels each side  
Return rollers each side  
Tracks (Type) Drop forged3
Length  
Width 5.5"3
Diameter  
Number of links 1003
Pitch 1.7"3
Tire tread  
Track centers/tread 4.55'3
  T-27A Tankette
Crew 23,4,6
Physical Characteristics  
Weight 1.9 tons4, 2.65 tons6, 2.68 tons3
2,700 kg6
Length w/gun 8.1'4, 8' 6"3,6
2.59 m6
Length w/o gun 8' 6"3
Height 4' 6"4, 4.76'3, 4' 9"6
1.45 m6
Width 6'3,4,6
1.83 m6
Width over tracks 5' 6"3
Ground clearance 9.5"3
Ground contact length 4' 6"4, 4.8'3
Ground pressure 10.7 psi3
Turret ring diameter  
Armament  
Main 1: 7.62 mm MG6
7.62 mm DT MG3,4
OR 12.7 mm DShK MG3
Secondary  
MG  
Side arms  
Quantity  
Main 7.62: 2,5203,4
Secondary  
MG  
Side arms  
Armor Thickness (mm) 106
0.39"6
Turret: 103
Hull Front, Upper 103,4
Hull Front, Lower  
Hull Sides, Upper 9 - 104, 103
Hull Sides, Lower  
Hull Rear 93
Hull Top 4 - 64, 63
Hull Bottom 4 - 64, 43
Engine (Make / Model) GAZ AA4
GAZ (Ford) AA3
Bore / stroke  
Cooling Water3
Cylinders 43,4
Capacity  
Net HP 404, 40@2,200 rpm3
Power to weight ratio 8.213
Compression ratio  
Transmission (Type) Epicyclic3
3 forward, 1 reverse3
Steering Clutch and brake3
Steering ratio  
Starter  
Electrical system  
Ignition  
Fuel (Type) Gasoline3,4
Octane  
Quantity 8 gallons3
Road consumption  
Cross country consumption  
Performance  
Traverse 20°3
Speed - Road 25 mph3,4, 26 mph6
42 kph6
Speed - Cross Country 20 mph3
Range - Road 53 miles3,4
Range - Cross Country 37.5 miles3, 38 miles4, 75 miles6
120 km6
Turning radius 13.1'3
Elevation limits -10° to +10°3
Fording depth 1.6'3
Trench crossing 4'3
Vertical obstacle 1.6'3
Climbing ability 40°3
Suspension (Type) Vickers-Carden-Loyd3
Wheels each side 6 bogies3
Return rollers each side  
Tracks (Type) Drop forged3
Length  
Width 5.5"3,4
Diameter  
Number of links 1083
Pitch 1.7"3
Tire tread  
Track centers/tread 5'3
  T-27B Tankette
Crew 23,4
Physical Characteristics  
Weight 1.9 tons3, 2.68 tons4
Length w/gun 8.1'3, 8' 6"4
Length w/o gun 8.1'3
Height 4' 6"3, 4.76'4
Width 5' 6"3,4
Width over tracks 5' 6"3
Ground clearance 11"3
Ground contact length 4.76'3,4
Ground pressure 7.6 psi3
Turret ring diameter  
Armament  
Main 7.62 mm DT MG3,4
OR 12.7 mm DShK MG3
Secondary  
MG  
Side arms  
Quantity  
Main 7.62: 2,5203,4
Secondary  
MG  
Side arms  
Armor Thickness (mm) Turret: 103
Hull Front, Upper 103,4
Hull Front, Lower  
Hull Sides, Upper 9 - 104, 103
Hull Sides, Lower  
Hull Rear 93
Hull Top 4 - 64, 63
Hull Bottom 4 - 64, 43
Engine (Make / Model) GAZ AA4
GAZ (Ford) AA3
Bore / stroke  
Cooling Water3
Cylinders 43,4
Capacity  
Net HP 404, 40@2,200 rpm3
Power to weight ratio 11.583
Compression ratio  
Transmission (Type) Epicyclic3
3 forward, 1 reverse3
Steering Clutch and brake3
Steering ratio  
Starter  
Electrical system  
Ignition  
Fuel (Type) Gasoline3,4
Octane  
Quantity 9.85 gallons3
Road consumption  
Cross country consumption  
Performance  
Traverse 20°3
Speed - Road 25 mph3,4
Speed - Cross Country 20 mph3
Range - Road 100 miles3,4
Range - Cross Country 37.5 miles3, 38 miles4
Turning radius 13.1'3
Elevation limits -10° to +10°3
Fording depth 2.15'3
Trench crossing 4'3
Vertical obstacle 1.6'3
Climbing ability 45°3
Suspension (Type) Vickers-Carden-Loyd3
Wheels each side 6 bogies3
Return rollers each side  
Tracks (Type) Drop forged3
Length  
Width 5.5"3,4
Diameter  
Number of links 1063
Pitch 1.7"3
Tire tread  
Track centers/tread 5'3

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. Russian Tanks 1900-1970, The Complete Illustrated History of Soviet Armoured Theory and Design, John Milsom,1970
  4. Airfix Magazine Guide 22 Russian Tanks of World War 2, John Milsom and Steve Zaloga, 1977
  5. Russian Tanks and Armored Vehicles 1917-1945, by Wolfgang Fleischer, 1999
  6. Russian Tanks of World War II, Stalin's Armored Might, Tim Bean, Will Fowler, 2002
20th Century American Military History Crucial Site