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Czechoslovakia
TNH (CKD/Praga) (CKD/Praga)

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Production of the Praga(TNH) was started in 1935 for export to Iran and was desert modified..

Photo of TNH (CKD/Praga) (CKD/Praga)
TNH (CKD/Praga)(CKD/Praga) scale illustration

General Details
Specifications
Operational Date(s)1935 - 1937
Quantity Produced130
Weight9.5 tonne
Crew3
M.G's small2
M.G's large(>10mm)n/a
Length4.55 mtr
Width2.00 mtr
Height1.94 mtr
Engine Details/Performance
Max Road Speed26 mph
Max Cross Country Speed15 mph
Range Road156 miles
Range Cross Country60 miles
Fuel TypePetrol
Fuel Capacityunknown
Horse Power100 hp
Power/Weight10 hp/tonne
General Information
Production of the Praga(TNH) was started in 1935 for export to Iran and was desert modified.

Armour Details
Turret
Front25mm@10°(25mm)
Side15mm@14°(15mm)
Rear15mm@15°(16mm)
Top8mm@81°(8mm)
Superstructure
Front25mm@17°(26mm)
Side16mm@(16mm)
Rear15mm@60°(30mm)
Top8mm@85°(8mm)
Hull
Front25mm@30°(29mm)
Side16mm@(16mm)
Rear16mm@(16mm)
Top8mm@90°(8mm)
Armour (x)mm @ (y)° (Effective mm @ 0°)
Effective Armour - Maximum 30 mm - Minimum 8 mm



Weapon Details
Flag
Skoda 37mm P.U.V. vz37 L/47.8 Blank
Manufactured1937 - 1938
Calibre37mm
LengthL/47
Number of Rounds 100
 
 
Ammunition Details
Name/Id Calibre Weight MVelocity Explosive Content
AP(AP)
37mm 0.85Kg 750M/Sec
Quoted Penetration 34mm@100m/30deg
Range(Mtr)1002004008001200160020002400
Flight Time(Secs) 0.14 0.28 0.6 1.36 2.37 3.77 5.82 9.15
Penetration(mm@30°) 51 46 40 32 25 19 13 8
Penetration(mm@0°) 60 54 47 37 29 22 16 10
Hit Probability(%) 98 98 98 90 54 22 3 1


 
3.7cm PzGr40(APCR)
37mm 0.37Kg 1020M/Sec
Quoted Penetration 64mm@100m/30deg
Range(Mtr)1002004008001200160020002400
Flight Time(Secs) 0.1 0.22 0.49 1.31 2.94 7.85
Penetration(mm@30°) 109 96 80 55 33 14
Penetration(mm@0°) 127 112 93 64 39 17
Hit Probability(%) 98 98 98 90 29 2

Hit probability is based on a static 2 x 2.4 metre panel at 0 degrees(vertical) at the range specified.

The data that has been used to create these records has come from Wikipedia, The Lone Sentry, The Bundes Archive and numerous books and websites that have provided the detailed information that has not been available anywhere else. The information we use to calculate the penetration tables, flight times and the hit probability comes from the Gun Calibre, the Shell Mass(Kg) and the muzzle velocity, plus range reductions to allow for gravity and wind resistance. This calculation originally came from a pre-war Krupp calculation which has been modified, and seems to fit the actual test results.

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