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Germany
SdKfz 250/11 2.8cm sPzB41 (Self propelled A/T)
Ordnance classification - SdKfz 250/11

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The SdKfz 250/11 2.8cm sPzB41 was designed in 1940, manufactured by Westerhutte, Deutsche Werke and Wumag based on the existing half track SdKfz 250 and was in use from 1942 to 1945.

Flag of World War 2 Germany
Photo of SdKfz 250/11 2.8cm sPzB41 (Self propelled A/T)

General Details
Specifications
Operational Date(s)1942 - 1945
Ordnance classificationSdKfz 250/11
Quantity Produced0
Weightunknown
Crew6
M.G's small1
M.G's large(>10mm)n/a
Length4.77 mtr
Width1.97 mtr
Height2.13 mtr
Engine Details/Performance
Max Road Speed38 mph
Max Cross Country Speed19 mph
Range Road200 miles
Range Cross Country100 miles
Fuel TypePetrol
Fuel Capacityunknown
Horse Power100 hp
Power/Weightunknown
General Information
The SdKfz 250/11 2.8cm sPzB41 was designed in 1940, manufactured by Westerhutte, Deutsche Werke and Wumag based on the existing half track SdKfz 250 and was in use from 1942 to 1945.

The vehicle was powered by Maybach 'HL42TUKRM' petrol powerplant producing 100 HP which could drive the vehicle on roads at up to 38 mph with a range of about 200 miles before refuelling. Its cross country performance was good providing a max speed of about 19 mph and a range of about 100 miles.

It was armed with 1 light machine gun , a 7.92mm MG 34. Its main armament consisted of a 2.8cm sPzB 41 which could penetrate 32 mm of flat plate at 100 metres


Armour Details
Turret
Frontn/a
Siden/a
Rearn/a
Topn/a
Superstructure
Front10mm@30°(12mm)
Side8mm@35°(10mm)
Rear8mm@17°(8mm)
Topn/a
Hull
Front15mm@12°(15mm)
Side8mm@30°(9mm)
Rear8mm@45°(11mm)
Top6mm@90°(6mm)
Armour (x)mm @ (y)° (Effective mm @ 0°)
Effective Armour - Maximum 15 mm - Minimum 6 mm



Weapon Details
Flag
 7.92mm MG 34
7.92mm Maschinengewehr 34
(translates as Machine Gun) 		Blank
photo of 7.92mm MG 34 from Bundesarchiv(https://www.bild.bundesarchiv.de)
History
Derived from the Solothern Maschinengewehr Modell 30, it became the main machine gun for the German army. It could be fitted with a bipod for infantry use, an Anti Aircraft mount, or a heavy tripod to turn the gun into a heavy machine gun.
ManufacturerMauser-Werke
Manufactured1936 - 1943
Calibre7.92mm
LengthL/79
Rate of Fire800 rpm
Number of Rounds 2010
 
 
Ammunition Details
Name/Id Calibre Weight MVelocity Explosive Content
S.m.K.H tungsten cored
(AP Standard Small Arms) 		7.92mm 0.013Kg 910M/Sec
Quoted Penetration 13mm@100m/30°
Range(Mtr)1002004008001200160020002400
Flight Time(Secs) 0.13 0.33 1.04
Penetration(mm@30°) 15 11 6
Penetration(mm@0°) 18 13 7
Hit Probability(%) 98 98 98


 
S.m.K
(BALL Standard Small Arms) 		7.92mm 0.012Kg 785M/Sec
Quoted Penetration 8mm@100m/30°
Range(Mtr)1002004008001200160020002400
Flight Time(Secs) 0.2
Penetration(mm@30°) 5
Penetration(mm@0°) 6
Hit Probability(%) 98


Weapon Details
Flag
 2.8cm sPzB 41
2.8cm schwere Panzerbüchse 41
(translates as Heavy Anti Tank Rifle) 		Blank
History
Highly effective squeeze bore Anti Tank weapon utilising a tungsten cored shell. The 28mm to 20mm squeeze bore gave the core a muzzle velocity of 1400 metres/second about 40% more than standard AP shells.
ManufacturerMauser-Werke
Manufactured1941 - 1942
Calibre28mm
LengthL/48
Rate of Fire15 rpm
 
Ammunition Details
Name/Id Calibre Weight MVelocity Explosive Content
2.8cm Pzgr Patr 41
(AP40 Armour Piercing Tungsten Cored) 		28mm 0.13Kg 1400M/Sec
Quoted Penetration 62mm @ 100mtr/30° ( ≈ 71mm/0°)
Range(Mtr)1002004008001200160020002400
Flight Time(Secs) 0.08 0.16 0.36 0.95 2.15 5.82
Penetration(mm@30°) 53 47 38 26 16 6
Penetration(mm@0°) 62 55 45 31 19 8
Hit Probability(%) 98 98 98 98 60 3



2.8cm Sprgr Patr 41
(HE High Explosive) 		28mm 0.09Kg 1400M/Sec 0.005Kg explosive
Maximum Range not shown as gun elevation is limited
Range(Mtr)1002004008001200160020002400
Flight Time(Secs) 0.08 0.16 0.36 0.96 2.17
Direct Fire
Range(Mtr)1002004008001200160020002400
Flight Time(Secs) 0.08 0.16 0.36 0.96 2.17 5.91
Hit Probability(%) 98 98 98 98 60 3
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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