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Soviet Union's Flag

Soviet Union's Tankette T-27

Design

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

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

Communicated via flag.

Crew

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

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.

The separate hatches for the crew were connected that allowed for them to open over the whole width of the T-27.

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

The engine was placed between the driver and the commander.

Prototype

The prototype was finished in 1931.

Production

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

  • T-27: 2,540, 2,541
    • Production: 1931 - 1933, ? - 1941
      • 1931: 348
      • 1932: 1,683
      • 1933: 500
  • T-27A: 348
  • T-27B: 2,500

Production Problems

In February 1938 the T-27s were to get an overhaul. 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. The cast steel would let small arms fire penetrate.

Variants

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

Usage

65 battalions contained 50 T-27s in each.

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

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.

Specifications

  T-27 Tankette
Crew Commander, driver
2
Physical Characteristics  
Weight 1.7 tons, 2.7 tons
1,727 kg
Length w/gun 7' 6", 8.5'
2.29 m, 2.6 m
Length w/o gun 7' 6"
Height 3' 7", 3.6', 4.5'
1.1 m, 1.44 m
Width 5' 1",5.1', 6'
1.55 m, 1.63 m
Width over tracks 5'
Ground clearance 9.5"
0.24 m
Ground contact length 4' 6"
Ground pressure 8.6 psi
0.75 kp/cm2
Turret ring diameter  
Armament  
Main 7.62 DT MG
7.62 MG
Secondary  
MG  
Side arms  
Quantity  
Main 2,520
Secondary  
MG  
Side arms  
Armor Thickness (mm) 4 - 9 , 9, 6 - 10
Turret: 9
Hull Front, Upper 9, 10
Hull Front, Lower  
Hull Sides, Upper 9, 10
Hull Sides, Lower  
Hull Rear 8, 10
Hull Top 6
Hull Bottom 4
Engine (Make / Model) GAZ AA
GAZ (Ford) AA
Bore / stroke 4 stroke
Cooling Water
Cylinders 4
Capacity  
Net HP 22@170 rpm, 22@1,700 rpm, 22 , 40@2,200 rpm
Power to weight ratio 11.9, 14.7 HP/ton
Compression ratio  
Transmission (Type) Epicyclic
3 forward, 1 reverse
Steering Clutch and brake
Steering ratio  
Starter  
Electrical system  
Ignition  
Fuel (Type) Gasoline
Octane  
Quantity 8 gallons
46 liters
Road consumption  
Cross country consumption  
Performance  
Traverse 20°
Speed - Road 28 mph
40 kph, 45 kph
Speed - Cross Country 20 mph
Range - Road 100 miles
80 km, 85 km, 161 km
Range - Cross Country 42 miles
Turning radius 12'
Elevation limits -10° to +10°
Fording depth 1.8'
0.5 m
Trench crossing 3.75'
1.2 m
Vertical obstacle 1.25'
0.5 m
Climbing ability 40°, 49°
Suspension (Type) Vickers-Carden-Loyd
Wheels each side  
Return rollers each side  
Tracks (Type) Drop forged
Length  
Width 5.5"
Diameter  
Number of links 100
Pitch 1.7"
Tire tread  
Track centers/tread 4.55'
  T-27A Tankette
Crew 2
Physical Characteristics  
Weight 1.9 tons, 2.65 tons, 2.68 tons
2,700 kg
Length w/gun 8.1', 8' 6"
2.59 m
Length w/o gun 8' 6"
Height 4' 6", 4.76', 4' 9"
1.45 m
Width 6'
1.83 m
Width over tracks 5' 6"
Ground clearance 9.5"
Ground contact length 4' 6", 4.8'
Ground pressure 10.7 psi
Turret ring diameter  
Armament  
Main 1: 7.62 mm MG
7.62 mm DT MG
OR 12.7 mm DShK MG
Secondary  
MG  
Side arms  
Quantity  
Main 7.62: 2,520
Secondary  
MG  
Side arms  
Armor Thickness (mm) 10
0.39"
Turret: 10
Hull Front, Upper 10
Hull Front, Lower  
Hull Sides, Upper 9 - 10, 10
Hull Sides, Lower  
Hull Rear 9
Hull Top 4 - 6, 6
Hull Bottom 4 - 6, 4
Engine (Make / Model) GAZ AA
GAZ (Ford) AA
Bore / stroke  
Cooling Water
Cylinders 4
Capacity  
Net HP 40, 40@2,200 rpm
Power to weight ratio 8.21
Compression ratio  
Transmission (Type) Epicyclic
3 forward, 1 reverse
Steering Clutch and brake
Steering ratio  
Starter  
Electrical system  
Ignition  
Fuel (Type) Gasoline
Octane  
Quantity 8 gallons
Road consumption  
Cross country consumption  
Performance  
Traverse 20°
Speed - Road 25 mph, 26 mph
42 kph
Speed - Cross Country 20 mph
Range - Road 53 miles
Range - Cross Country 37.5 miles, 38 miles, 75 miles
120 km
Turning radius 13.1'
Elevation limits -10° to +10°
Fording depth 1.6'
Trench crossing 4'
Vertical obstacle 1.6'
Climbing ability 40°
Suspension (Type) Vickers-Carden-Loyd
Wheels each side 6 bogies
Return rollers each side  
Tracks (Type) Drop forged
Length  
Width 5.5"
Diameter  
Number of links 108
Pitch 1.7"
Tire tread  
Track centers/tread 5'
  T-27B Tankette
Crew 2
Physical Characteristics  
Weight 1.9 tons, 2.68 tons
Length w/gun 8.1', 8' 6"
Length w/o gun 8.1'
Height 4' 6", 4.76'
Width 5' 6"
Width over tracks 5' 6"
Ground clearance 11"
Ground contact length 4.76'
Ground pressure 7.6 psi
Turret ring diameter  
Armament  
Main 7.62 mm DT MG
OR 12.7 mm DShK MG
Secondary  
MG  
Side arms  
Quantity  
Main 7.62: 2,520
Secondary  
MG  
Side arms  
Armor Thickness (mm) Turret: 10
Hull Front, Upper 10
Hull Front, Lower  
Hull Sides, Upper 9 - 10, 10
Hull Sides, Lower  
Hull Rear 9
Hull Top 4 - 6, 6
Hull Bottom 4 - 6, 4
Engine (Make / Model) GAZ AA
GAZ (Ford) AA
Bore / stroke  
Cooling Water
Cylinders 4
Capacity  
Net HP 40, 40@2,200 rpm
Power to weight ratio 11.58
Compression ratio  
Transmission (Type) Epicyclic
3 forward, 1 reverse
Steering Clutch and brake
Steering ratio  
Starter  
Electrical system  
Ignition  
Fuel (Type) Gasoline
Octane  
Quantity 9.85 gallons
Road consumption  
Cross country consumption  
Performance  
Traverse 20°
Speed - Road 25 mph
Speed - Cross Country 20 mph
Range - Road 100 miles
Range - Cross Country 37.5 miles, 38 miles
Turning radius 13.1'
Elevation limits -10° to +10°
Fording depth 2.15'
Trench crossing 4'
Vertical obstacle 1.6'
Climbing ability 45°
Suspension (Type) Vickers-Carden-Loyd
Wheels each side 6 bogies
Return rollers each side  
Tracks (Type) Drop forged
Length  
Width 5.5"
Diameter  
Number of links 106
Pitch 1.7"
Tire tread  
Track centers/tread 5'

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
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