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Germany
StuG III Ausf B 7.5cm Stu.K. L/24 (Stug III)
Ordnance classification - SdKfz 142

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The StuG III Ausf B 7.5cm Stu.K. L/24 was designed in 1939, manufactured by Alkett based on the existing fully tracked PzKpfw III and was in use from 1940 to 1945.

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Photo of StuG III Ausf B 7.5cm Stu.K. L/24  (Stug III)
StuG III Ausf B 7.5cm Stu.K. L/24 (Stug III) scale illustration

General Details
Specifications
Operational Date(s)1940 - 1945
Ordnance classificationSdKfz 142
Quantity Produced320
Weight20.2 tonne
Crew4
M.G's smalln/a
M.G's large(>10mm)n/a
Length5.38 mtr
Width2.92 mtr
Height1.95 mtr
Engine Details/Performance
Max Road Speed25 mph
Max Cross Country Speed13 mph
Range Road97 miles
Range Cross Country38 miles
Fuel TypePetrol
Fuel Capacityunknown
Horse Power300 hp
Power/Weight14 hp/tonne
General Information
The StuG III Ausf B 7.5cm Stu.K. L/24 was designed in 1939, manufactured by Alkett based on the existing fully tracked PzKpfw III and was in use from 1940 to 1945.

The vehicle was powered by Maybach 'HL120 TRM' petrol powerplant producing 300 HP which could drive the vehicle on roads at up to 25 mph with a range of about 97 miles before refuelling. Its cross country performance was good providing a max speed of about 13 mph and a range of about 38 miles.

Its main armament consisted of a 7.5cm StuK 37 L/24 which could penetrate 68 mm of flat plate at 200 metres

Designed as an infantry support vehicle in 1936, it was to utilise the PzKpfw III chassis in a vehicle with a very low profile.

Armour Details
Turret
Frontn/a
Siden/a
Rearn/a
Topn/a
Superstructure
Front50mm@10°(51mm)
Side30mm@(30mm)
Rear30mm@30°(35mm)
Top11mm@83°(11mm)
Hull
Front50mm@21°(54mm)
Side30mm@(30mm)
Rear30mm@30°(35mm)
Top16mm@90°(16mm)
Armour (x)mm @ (y)° (Effective mm @ 0°)
Effective Armour - Maximum 54 mm - Minimum 16 mm



Weapon Details
Flag
7.5cm StuK 37 L/24
(Tank Gun)
Blank
Calibre75mm
LengthL/24
 
Ammunition Details
Name/Id Calibre Weight MVelocity Explosive Content
K. Gr. rot Pz
(AP Armor Piercing)
75mm 6.8Kg 385M/Sec
Quoted Penetration 38mm@500m/30°
Range(Mtr)1002004008001200160020002400
Flight Time(Secs) 0.26 0.53 1.1 2.33 3.71 5.28 7.09 9.17
Penetration(mm@30°) 63 58 53 46 40 35 30 25
Penetration(mm@0°) 73 68 62 54 47 41 35 29
Hit Probability(%) 98 98 98 54 22 6 2 1



7.5 cm Sprgr.34 - short
(HE High Explosive)
75mm 4.4Kg 385M/Sec 0.454Kg explosive
Maximum Range not shown as gun elevation is limited
Range(Mtr)1002004008001200160020002400
Flight Time(Secs) 0.26 0.53 1.1 2.33 3.71 5.29 7.09 9.17
Direct Fire
Range(Mtr)1002004008001200160020002400
Flight Time(Secs) 0.26 0.53 1.1 2.33 3.71 5.29 7.09 9.17
Hit Probability(%) 98 98 98 54 22 6 2 1
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% kill16 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 16 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.

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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