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USSR
BT-2

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The BT-2 based on the existing BT and was in use from 1932.

Flag of World War 2 Union Soviet Socialist Republics

General Details
Specifications
Operational Date(s)1932
Ordnance classification
Quantity Produced0
Weightunknown
Crew3
M.G's small1
M.G's large(>10mm)n/a
Length5.54 mtr
Width2.26 mtr
Height1.95 mtr
Engine Details/Performance
Max Road Speed69 mph
Max Cross Country Speed39 mph
Range Road187 miles
Range Cross Country125 miles
Fuel TypeUnknown
Fuel Capacity88 gal
Horse Power400 hp
Power/Weightunknown
General Information
The BT-2 based on the existing BT and was in use from 1932.

It was armed with 1 light machine gun. Its main armament consisted of a 37mm Hotchkiss L/21 which could penetrate 20 mm of flat plate at 100 metres


Armour Details
Turret
Front13mm@10°(13mm)
Side13mm@10°(13mm)
Rear13mm@10°(13mm)
Top10mm@90°(10mm)
Superstructure
Front13mm@30°(15mm)
Side13mm@(13mm)
Rear10mm@(10mm)
Top6mm@90°(6mm)
Hull
Front13mm@30°(15mm)
Side13mm@(13mm)
Rear13mm@(13mm)
Top6mm@90°(6mm)
Armour (x)mm @ (y)° (Effective mm @ 0°)
Effective Armour - Maximum 15 mm - Minimum 6 mm



Weapon Details
Flag
37mm Hotchkiss L/21
(Tank Gun)
Blank
History
Modified version of the French Puteaux SA 18
Calibre37mm
LengthL/21
 
Ammunition Details
Name/Id Calibre Weight MVelocity Explosive Content
Puteaux AP
(AP Armor Piercing)
37mm 0.56Kg 388M/Sec
Range(Mtr)1002004008001200160020002400
Flight Time(Secs) 0.27 0.55 1.16 2.64 4.6 7.28 11.31
Penetration(mm@30°) 17 15 12 10 8 6 4
Penetration(mm@0°) 20 18 15 12 10 7 5
Hit Probability(%) 98 98 96 41 8 2 0



37mm Mle1892
(HE High Explosive)
37mm 0.56Kg 388M/Sec 0.015Kg explosive
Range(Mtr)1002004008001200160020002400
Flight Time(Secs) 0.27 0.55 1.16 2.64 4.6
Direct Fire
Range(Mtr)1002004008001200160020002400
Flight Time(Secs) 0.27 0.55 1.16 2.64 4.6 7.28 11.31 17.68
Hit Probability(%) 98 98 96 41 8 2 0 0
Blast/Fragmentation Effects
Burst radius Infantry in open 99% kill0 mtr Burst radius Infantry in open 66% kill0 mtr
Burst radius Infantry in open 33% kill1 mtr  Armour Penetration inc roof at 1 mtr0 mm
An explosion within 0 mtr of infantry in the open will cause > 66% casualties and could damage some AFV's.
An explosion within 1 mtr of infantry in the open will cause 33% casualties.
The blast effect of this shell exploding within 1 mtr of an armoured vehicle will not cause any significant armour damage.

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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