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Czechoslovakia's TNH P-S light tank

Design

In 1937 the Czechoslovakian army wanted a replacement for the LT vz 35.2,3,7 Two designs were developed by Skoda and CKD (Ceskomoravska Kolben Danek of Prague, after 1940 Böhmisch-Mährische Maschinenfabrik AG).3,6 The Skoda was the S-11-a and S-11-b.2,3 The CKD model was basically an improved LT vz 35 with the transmission and engine from a TNH tank.2,3

The floor under the fuel tanks were secured by small bolts. This was made to blow out the floor if an explosion happened inside the tank to reduce the damage internally.

Suspension

There were 4 large bogie wheels mounted in pairs on each side on longitudinal leaf springs.2 The drive was in the front by sprockets with 19 teeth.6 These were attached via a pinion to a cross-shaft.6 This was attached to the gearbox which then had a propeller shaft go to the rear and meet up with the engine.6

Armament

The coaxial MG could be fired independently of the main armament as it was ball mounted.

The 37.2 mm Skoda A7 L47.8 gun's elevation gear could be locked for firing.6

Engine

The engine was mounted vertically in the center of the rear compartment.2,4

The drive sprocket was in the front with the idler in the rear.3,4

A Praga-Wilson pre-selector gearbox simplified the gear changing and drove the front sprocket by a 2-stage epicyclic steering gear.

Crew

The driver sat on the right and the machine gunner to the left.2,3

After the Germans took possession of the TNHPs they removed some of the ammunition to make room for a loader.7

Construction

The hull and turret were riveted with the superstructure bolted in place.2,3,6

Turret

The commander's cupola didn't rotate and had four periscopes.6

Hull

Between the driver and the hull machine gunner was the gearbox.6

New Designs T-15 and T-25

In 1942 or 1943 the Heereswaffenamt (Wa.Prüf.6) gave Skoda specifications for a 10.5 ton reconnaissance tank and a 22 ton medium tank.6 They were to be based on a longer and wider TNHP-S chassis.6

The T-15 was to have a 50 mm gun.6 Its armor protection was to be 50 mm in front, 20 mm in the sides, and 15 mm protecting the rear.6 The armor plates were angled more.6

The T-25 was to be armed with a semi-automatic 75 mm gun.6

Prototype

After extensive trials the TNH P-S was selected and on July 1, 1938 it was designated the standard light tank of the Czechoslovakian army.2,3

After tests 150 were ordered.4

T-15

The prototype T-15 had a fake 37 mm gun mounted in the turret.6

Production

  • TNH P-S:
  • T-15: 16

Variants

  • TNH P-S (Schwer) : Germans ordered the armor to be increased.6
  • LT vz 38: Production designation.3
  • T-15: Prototype requested by Germany.6 One prototype built.6
  • T-25: Prototype requested by Germany.6 Never built.6
  • Heuschrecke (Grasshopper): Was to be a T-25 with a 10.5 cm le.F.H.43(sft) Skoda L/30 gun.6 Mockup built.6
  • Germany

Usage

Production ended in April 1942. 1964,6 were exported to Bulgaria (10)2,3, Hungary (102)2,3, Romania (50)2,3, Slovakia (69)2,3, Afghanistan6, Latvia6, Peru6, Sweden6 (built as the Strv.m/41), Switzerland6, Yugoslavia6, and one to Britain6.

Saw action in Poland, Belgium, France, Yugoslavia, Greece, and Russia.

Czechoslovakia Never Used

None had entered service by the time of the German occupation.3

Contributed to German Success

During 1940 - 1941 this vehicle provided 1/4 of the German tank strength.

Specifications

  TNH P-S2 (S=schwer)4
Crew Commander, gunner, loader, driver6
42,3,5,6,7
Physical Characteristics  
Weight 21,385 lb2,3
8.5 tons4, 9.25 tons7, 9.7 tons6, 10 tons5
9,400 kg7, 9,700 kg2,3
Length 14' 11"2,3, 14.91'6, 15' 1"7, 15' 3"5
4.546 m2, 4.55 m3, 4.6 m7
Height 7' 2"5, 7.76'6, 7' 7"2,3, 7' 10"7
2.31 m3, 2.311 m2, 2.4 m7
Width 6.74'6, 6' 11"7, 7'2,3,5
2.11 m7, 2.13 m3, 2.133 m2
Ground clearance 1.32'6
Ground contact length 9.56'6
Ground pressure 10.2 psi6
0.57 kg/cm2
Turret ring diameter 3' 11.5"
Armament  
Main 1: 3.7 cm5,7
1: 37 mm Skoda A7 L/47.86
1: 37.2 mm Skoda A72,3
OR 1: 3.7 cm KwK L/457
OR 1: 37 mm KwK L/407
Secondary  
MG 2: 7.92 mm MG7
MG - coaxial 1: MG5
1: 7.92 mm MG2,3
1: 7.92 mm 7165 CZ Type 37 MG6
MG - hull 1: MG5
1: 7.92 mm MG3
1: 7.92 mm 7165 CZ Type 37 MG6
Side arms  
Quantity  
Main 902,3, 90 (HE and AP)6
Secondary  
MG 2,5502,3,6
Side arms  
Armor Thickness (mm) Front: 504
Side: 304
10 - 252, 10 - 263, 257
Hull Front, Upper 256
Hull Front, Lower

256

Hull Sides, Upper 196
Hull Sides, Lower 156
Hull Rear 126
Hull Top 106
Hull Bottom 86
Turret Front 256
Turret Sides 156
Turret Rear 156
Turret Top 106
Engine (Make / Model) Praga EPA2,3,7
Cylinders 62,5, I-63,6, 167
Cooling Water2,5,6
Net HP 1255,7, 1502,3
125@2,200 rpm6
Late models: 1505
Transmission Praga Wilson pre-selector
5 forward, 1 reverse.2,3
Electrical system 12 volt6
Fuel (type) Gasoline2,7
Octane  
Capacity

49 gallons6

Fuel consumption - road 2.6 mpg6
Performance  
Traverse 360°, hand6
Speed - Road 25 mph5, 26 mph2,3, 26.1 mph7, 35 mph6
42 kph2,3,7
Speed - Cross Country 9.3 mph
15 kph
Range - Road 125 miles2,3,6, 155.3 miles7
200 km2,3, 250 km7
Range - Cross Country 89 miles6
Turning Radius 14.9'6
Elevation Limits +12° to -6°2,3,6
Fording depth 3'2,3,6
0.9 m2,3
Trench crossing 6.1'6, 6' 2"2,3
1.879 m2,3
Vertical Obstacle 2.6'6, 2' 7"2,3
0.787 m2,3
Climbing ability 60%3, 30°6
Suspension (Type) Rubber tired wheels suspended in pairs on leaf springs2,3,5,6
Wheels each side 42,3,5,6
Wheel diameter  
Return rollers each side 22,6
(supported inside of track only)
Tracks (Type) Magnesium skeleton6
Track length  
Tires  
Links 87-906
Pitch 4.09"6
Track width 11.5"6
Track centers/tread 6.16'6
  TNH
Crew 3-41
Physical Characteristics  
Weight 8.5 tons1
Length 14' 9.5"1
Height  
Width 6' 8.75"1
Ground clearance  
Ground contact length  
Ground pressure  
Turret ring diameter  
Armament  
Main 37 mm1
Secondary  
MG 2: MGs1
Side arms  
Quantity  
Main  
Secondary  
MG  
Side arms  
Armor Thickness (mm) 251
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) Praga1
Cylinders  
Cooling  
Net HP  
Transmission  
Electrical system  
Fuel type  
Octane  
Capacity  
Fuel consumption - road  
Performance  
Traverse  
Speed - Road 26.1 mph1
Speed - Cross Country  
Range - Road  
Range - Cross Country  
Turning Radius  
Elevation Limits  
Fording depth  
Trench crossing  
Vertical Obstacle  
Climbing ability  
Suspension (Type)  
Wheels each side  
Wheel diameter  
Return rollers each side  
Tracks (Type)  
Track length  
Tires  
Links  
Pitch  
Track width  
Track centers/tread  
  TNHP
Crew Commander, gunner, loader/operator, driver4
44, 3-41
Physical Characteristics  
Weight 8 tons4,6, 9 tons1
Length 14' 9.5"4, 15' 3"1
Height 6' 9.5"4, 7' 2"1
Width 6' 9.5"4, 7'1
Ground clearance  
Ground contact length  
Ground pressure  
Turret ring diameter 3' 11.5"6
Armament  
Main 37 mm1
37 mm Skoda A-7 L/47.84,6
Secondary  
MG 2: 7.92 mm MGs1
MG - coaxial 1: 7.92 mm Besa MG4,6
MG - hull 1: 7.92 mm Besa MG4,6
Side arms  
Quantity  
Main  
Secondary  
MG  
Side arms  
Armor Thickness (mm) 251
Front: 254,6
Side: 194,6
Rear: 154,6
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) Praga1
Praga TNHP OHV4,6
Cylinders 66, I-64
Cooling Water4,6
Net HP 125 @ 2,200 rpm4,6
Transmission Praga-Wilson pre-selector6
5 speed6
Electrical system 12 volt Scintilla6
Fuel type  
Octane  
Capacity 49 gallons6
Fuel consumption - road  
Performance  
Traverse  
Speed - Road 26.1 mph1, 35 mph4
Speed - Cross Country  
Range - Road 125 miles4
Range - Cross Country  
Turning Radius  
Elevation Limits  
Fording depth  
Trench crossing  
Vertical Obstacle  
Climbing ability  
Suspension (Type) Rubber tired, mounted on a cranked stub axle, controlled by semi-elliptic spring4
Wheels each side 44,6
Wheel diameter 2' 5"6
Return rollers each side 24,6
Tracks (Type)  
Track length  
Tires  
Links  
Pitch  
Track width 11.55"6
Track centers/tread  
  TNH-Sv
Crew 3-41
Physical Characteristics  
Weight 10.5 tons1
Length  
Height  
Width  
Ground clearance  
Ground contact length  
Ground pressure  
Turret ring diameter  
Armament  
Main 37 mm1
Secondary  
MG 2: 8 mm MGs1
Side arms  
Quantity  
Main  
Secondary  
MG  
Side arms  
Armor Thickness (mm)  
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)  
Cylinders  
Cooling  
Net HP  
Transmission  
Electrical system  
Fuel type  
Octane  
Capacity  
Fuel consumption - road  
Performance  
Traverse  
Speed - Road  
Speed - Cross Country  
Range - Road  
Range - Cross Country  
Turning Radius  
Elevation Limits  
Fording depth  
Trench crossing  
Vertical Obstacle  
Climbing ability  
Suspension (Type)  
Wheels each side  
Wheel diameter  
Return rollers each side  
Tracks (Type)  
Track length  
Tires  
Links  
Pitch  
Track width  
Track centers/tread  

Sources:

  1. Tanks of the World, 1915-1945, Peter Chamberlain, Chris Ellis, 1972
  2. The Encyclopedia of Weapons of World War II, Chris Bishop, 1998
  3. Tanks - Over 250 of the World's Tanks and Armored Fighting Vehicles, Chris Chant, 2004
  4. Tanks of World War II, Duncan Crow, 1979
  5. German Tanks and Armoured Vehicles 1914 - 1945, B. T. White, 1966
  6. Profile AFV Weapons #22 Panzerkampfwagen 38(t) & 35(t), John Milsom, 1970
  7. World War I and II Tanks, George Forty, 2012
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