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Italy
Carro Armato M13/40 Medium Tank

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The Carro Armato M13/40 Medium Tank based on the existing fully tracked M13/40 and was in use from 1940.

Flag of World War 2 Italy
Photo of Carro Armato M13/40 Medium Tank

General Details
Specifications
Operational Date(s)1940
Quantity Produced1960
Weight14 tonne
Crew4
M.G's small2
M.G's large(>10mm)n/a
Length4.98 mtr
Width2.26 mtr
Height2.40 mtr
Engine Details/Performance
Max Road Speed21 mph
Max Cross Country Speed11 mph
Range Road1200 miles
Range Cross Country480 miles
Fuel TypeDiesel
Fuel Capacityunknown
Horse Power125 hp
Power/Weight8 hp/tonne
General Information
The Carro Armato M13/40 Medium Tank based on the existing fully tracked M13/40 and was in use from 1940.

The vehicle was powered by FIAT-SPA 'SPA 8 T M40' diesel powerplant producing 125 HP which could drive the vehicle on roads at up to 21 mph with a range of about 1200 miles before refuelling. Its cross country performance was good providing a max speed of about 11 mph and a range of about 480 miles.

It was armed with 2 light machine guns. Its main armament consisted of an Cannone contracarro da 47/35 M35 L/40 which could penetrate 67 mm of flat plate at 400 metres



The Carro Armato M13/40 was a new tank based on the M11/39 but larger.

Armour Details
Turret
Front37mm@16°(38mm)
Side25mm@22°(27mm)
Rear25mm@22°(27mm)
Top14mm@85°(14mm)
Superstructure
Front30mm@11°(31mm)
Side25mm@(25mm)
Rear25mm@(25mm)
Top14mm@90°(14mm)
Hull
Front30mm@45°(42mm)
Side25mm@(25mm)
Rear25mm@20°(27mm)
Top6mm@90°(6mm)
Armour (x)mm @ (y)° (Effective mm @ 0°)
Effective Armour - Maximum 42 mm - Minimum 6 mm



Weapon Details
Flag
Cannone contracarro da 47/35 M35 L/40
(Machine Gun)
Blank
photo of Cannone contracarro da 47/35 M35 L/40 from Wikipedia
History
This was the Austrian 4.7cm Bohler L/39 manufactured under licence, and was used in all theatres till Italy surrendered, this version was modified to use a longer barrel and cartridge and was primarily a tank gun.
Manufactured1935 - 1943
Calibre47mm
LengthL/40
 
Ammunition Details
Name/Id Calibre Weight MVelocity Explosive Content
47 x 328 mm R L/40
(AP Armor Piercing)
47mm 1.6Kg 820M/Sec
Quoted Penetration 70mm @ 100mtr/30° ( ≈ 80mm/0°)
Range(Mtr)1002004008001200160020002400
Flight Time(Secs) 0.12 0.25 0.53 1.18 1.97 2.96 4.25 5.98
Penetration(mm@30°) 71 65 58 48 39 32 25 19
Penetration(mm@0°) 83 76 67 56 46 37 29 22
Hit Probability(%) 98 98 98 96 69 29 15 3



Bohler HE
(HE High Explosive)
47mm 2.37Kg 250M/Sec ≈0.356Kg explosive
Maximum Range 7000 Mtr
Range(Mtr)1002004008001200160020002400
Flight Time(Secs) 0.41 0.84 1.75 3.86 6.45 9.72 13.94 19.68
Direct Fire
Range(Mtr)1002004008001200160020002400
Flight Time(Secs) 0.41 0.84 1.75 3.86 6.45 9.72 13.94 19.68
Hit Probability(%) 98 98 77 22 3 1 0 0
Blast/Fragmentation Effects
Burst radius Infantry in open 99% kill3 mtr Burst radius Infantry in open 66% kill6 mtr
Burst radius Infantry in open 33% kill15 mtr  Armour Penetration inc roof at 1 mtr1 mm
An explosion within 3 mtr of infantry in the open will cause 99% casualties - lethal.
An explosion within 6 mtr of infantry in the open will cause > 66% casualties and could damage some AFV's.
An explosion within 15 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 penetrate 1 mm of the tank armour including the roof.


 
Bohler HEAT
(HEAT High Explosive Anti-Tank)
47mm 2.37Kg 250M/Sec
Quoted Penetration 55mm @ 0mtr/0°
Range(Mtr)1002004008001200160020002400
Flight Time(Secs) 0.41 0.84 1.75 3.86 6.45 9.72
Penetration(mm@30°) 55 55 55 55 55 55
Penetration(mm@0°) 55 55 55 55 55 55
Hit Probability(%) 98 98 77 22 3 1

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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