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Germany
SdKfz 251/17 Ausf D 2cm Flak S.P. AA (Hanomag)
Ordnance classification - SdKfz 251/17

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The SdKfz 251/17 Ausf D 2cm Flak S.P. AA was designed in 1943, manufactured by Hanomag Borgward based on the existing half track SdKfz 251 Ausf D and was in use from 1943 to 1945.

Flag of World War 2 Germany
Photo of SdKfz 251/17 Ausf D 2cm Flak S.P. AA (Hanomag)
SdKfz 251/17 Ausf D 2cm Flak S.P. AA(Hanomag) scale illustration

General Details
Specifications
Operational Date(s)1943 - 1945
Ordnance classificationSdKfz 251/17
Quantity Produced0
Weight8 tonne
Crew5
M.G's small2
M.G's large(>10mm)n/a
Length5.85 mtr
Width2.12 mtr
Height2.34 mtr
Engine Details/Performance
Max Road Speed33 mph
Max Cross Country Speed16 mph
Range Road188 miles
Range Cross Country94 miles
Fuel TypePetrol
Fuel Capacityunknown
Horse Power100 hp
Power/Weight12 hp/tonne
General Information
The SdKfz 251/17 Ausf D 2cm Flak S.P. AA was designed in 1943, manufactured by Hanomag Borgward based on the existing half track SdKfz 251 Ausf D and was in use from 1943 to 1945.

The vehicle was powered by Maybach 'HL-42' petrol powerplant producing 100 HP which could drive the vehicle on roads at up to 33 mph with a range of about 188 miles before refuelling. Its cross country performance was good providing a max speed of about 16 mph and a range of about 94 miles.

It was armed with 2 light machine guns. Its main armament consisted of a 2.0cm Flak 38 L/112.5 which could penetrate 6 mm of flat plate at 800 metres

The vehicles could carry 10 panzer grenadiers in a small arms and shrapnel protected space. The model D superceeded the A,B and C models by simplifying the vehicle to speed up production.

Armour Details
Turret
Frontn/a
Siden/a
Rearn/a
Topn/a
Superstructure
Front10mm@33°(12mm)
Side8mm@35°(10mm)
Rear8mm@33°(10mm)
Topn/a
Hull
Front15mm@22°(16mm)
Side8mm@35°(10mm)
Rear8mm@33°(10mm)
Top6mm@90°(6mm)
Armour (x)mm @ (y)° (Effective mm @ 0°)
Effective Armour - Maximum 16 mm - Minimum 6 mm



Weapon Details
Flag
2.0cm Flak 38 L/112.5
2.0cm Flugabwehrkanone 38 L/112.5
(translates as Anti Aircraft Gun)
Blank
photo of 2.0cm Flak 38 L/112.5 from 2cm Flak 38 photo from Wikipedia
History
Originally developed for the Luftwaffe to replace the slower firing 2cm Flak 30, this became the main low level Anti Aicraft gun in the German Forces.

The Flakvierling was a four barreled version that had a rate of fire of 1680 rounds per minute and was mounted on a variety of vehicles.
ManufacturerMauser-Werke
Manufactured1940 - 1945
Calibre20mm
LengthL/112
Rate of Fire420 rpm
 
Ammunition Details
Name/Id Calibre Weight MVelocity Explosive Content
2.0cm PzGr 39
(AP Armor Piercing)
20mm 0.12Kg 899M/Sec
Quoted Penetration 23mm @ 100mtr/30° ( ≈ 26mm/0°)
Range(Mtr)1002004008001200160020002400
Flight Time(Secs) 0.12 0.25 0.59 1.68
Penetration(mm@30°) 18 13 9 5
Penetration(mm@0°) 21 16 11 6
Hit Probability(%) 98 98 98 81


 
2.0cm PzGr 40
(APCR Armor Piercing Composite Rigid)
20mm 0.115Kg 1060M/Sec
Quoted Penetration 40mm @ 100mtr/0°
Range(Mtr)1002004008001200160020002400
Flight Time(Secs) 0.1 0.21 0.47 1.26 2.88 7.67
Penetration(mm@30°) 35 31 25 17 10 4
Penetration(mm@0°) 41 36 30 20 12 5
Hit Probability(%) 98 98 98 93 34 2



2 cm Sprgr. 39
(HE High Explosive)
20mm 0.132Kg 995M/Sec 0.006Kg explosive
Maximum Range 2000 Mtr
Range(Mtr)1002004008001200160020002400
Flight Time(Secs) 0.11 0.22 0.5 1.35 3.05 8.12
Direct Fire
Range(Mtr)1002004008001200160020002400
Flight Time(Secs) 0.11 0.22 0.5 1.35 3.05 8.12
Hit Probability(%) 98 98 98 90 25 2
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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