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Germany
7.62cm Pak 36(r) Gw II(A,B,C,F) (Marder II)
Ordnance classification - SdKfz 131

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The 7.62cm Pak 36(r) Gw II(A,B,C,F) was designed in 1941, manufactured by Alkett and Wegmann based on the existing fully tracked PzKpfw II and was in use from 1942 to 1945.

Flag of World War 2 Germany
Photo of 7.62cm Pak 36(r) Gw II(A,B,C,F) (Marder II)
7.62cm Pak 36(r) Gw II(A,B,C,F)(Marder II) scale illustration

General Details
Specifications
Operational Date(s)1942 - 1945
Ordnance classificationSdKfz 131
Quantity Produced150
Weight10.8 tonne
Crew4
M.G's small1
M.G's large(>10mm)n/a
Length4.81 mtr
Width2.22 mtr
Height1.99 mtr
Engine Details/Performance
Max Road Speed25 mph
Max Cross Country Speed12 mph
Range Road125 miles
Range Cross Country50 miles
Fuel TypePetrol
Fuel Capacityunknown
Horse Power140 hp
Power/Weight12 hp/tonne
General Information
The 7.62cm Pak 36(r) Gw II(A,B,C,F) was designed in 1941, manufactured by Alkett and Wegmann based on the existing fully tracked PzKpfw II and was in use from 1942 to 1945.

The vehicle was powered by Maybach 'HL62TRM' petrol powerplant producing 140 HP which could drive the vehicle on roads at up to 25 mph with a range of about 125 miles before refuelling. Its cross country performance was good providing a max speed of about 12 mph and a range of about 50 miles.

It was armed with 1 light machine gun. Its main armament consisted of a 7.5cm Pak 40 L/46 which could penetrate 140 mm of flat plate at 200 metres Its main armament consisted and a 7.62cm Pak 36(r) L/51 which could penetrate 143 mm of flat plate at 200 metres.

Armour Details
Turret
Frontn/a
Siden/a
Rearn/a
Topn/a
Superstructure
Front30mm@10°(30mm)
Side10mm@8°(10mm)
Rear10mm@0°(10mm)
Top10mm@90°(10mm)
Hull
Front35mm@13°(36mm)
Side15mm@0°(15mm)
Rear15mm@7°(15mm)
Top5mm@90°(5mm)
Armour (x)mm @ (y)° (Effective mm @ 0°)
Effective Armour - Maximum 36 mm - Minimum 5 mm



Weapon Details
Flag
 7.5cm Pak 40 L/46
7.5cm Panzerabwehrkanone 40 L/46
(translates as Anti Tank Gun) 		Blank
photo of 7.5cm Pak 40 L/46 from Wikipedia
History
This was an enlarged 5cm Pak 38 so looks very similar, but with improved performance especially against the Russian T34
ManufacturerRheinmetal-Borsig
Manufactured1941 - 1945
Calibre75mm
LengthL/46
Rate of Fire14 rpm
Number of Rounds 30
 
 
Ammunition Details
Name/Id Calibre Weight MVelocity Explosive Content
7.5cm Pzgr 39 L/48
(AP Armor Piercing) 		75mm 6.8Kg 792M/Sec
Quoted Penetration 96mm @ 500mtr/30° ( ≈ 110mm/0°)
Range(Mtr)1002004008001200160020002400
Flight Time(Secs) 0.13 0.26 0.53 1.13 1.8 2.57 3.44 4.46
Penetration(mm@30°) 130 121 110 96 84 72 62 51
Penetration(mm@0°) 151 140 128 112 98 84 72 60
Hit Probability(%) 98 98 98 96 77 44 25 15


 
7.5cm Pzgr 40
(AP40 Armour Piercing Tungsten Cored) 		75mm 4.1Kg 920M/Sec
Quoted Penetration 115mm @ 500mtr/30° ( ≈ 132mm/0°)
Range(Mtr)1002004008001200160020002400
Flight Time(Secs) 0.11 0.23 0.47 1.02 1.67 2.45 3.42 4.63
Penetration(mm@30°) 151 138 123 105 88 72 58 45
Penetration(mm@0°) 175 160 143 122 102 84 68 53
Hit Probability(%) 98 98 98 98 81 48 25 8



7.5cm Sprgr 34
(HE High Explosive) 		75mm 5.8Kg 548M/Sec 0.640Kg explosive
Maximum Range not shown as gun elevation is limited
Range(Mtr)1002004008001200160020002400
Flight Time(Secs) 0.18 0.38 0.77 1.63 2.61 3.71 4.98 6.44
Direct Fire
Range(Mtr)1002004008001200160020002400
Flight Time(Secs) 0.18 0.38 0.77 1.63 2.61 3.71 4.98 6.44
Hit Probability(%) 98 98 98 81 41 22 8 3
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% kill17 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 17 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.


Weapon Details
Flag
 7.62cm Pak 36(r) L/51
7.62cm Panzerabwehrkanone 36(r) L/51
(translates as Anti Tank Gun) 		Blank
photo of 7.62cm Pak 36(r) L/51 from By Balcer~commonswiki - Own work, CC BY 2.5, https://commons.wikimedia.org
History
This was the Soviet 7.62 1936 model many of which were captured in the early weeks of the Russian campaign and bored out to take the 7.5cm Pak 40 cartridge together with an added muzzle break.
Manufactured1942 - unknown
Calibre76.20mm
LengthL/51
Rate of Fire12 rpm
 
Ammunition Details
Name/Id Calibre Weight MVelocity Explosive Content
7.62cm Pzgr Patr 39
(AP Armor Piercing) 		76.20mm 7.54Kg 740M/Sec
Quoted Penetration 98mm @ 500mtr/30° ( ≈ 113mm/0°)
Range(Mtr)1002004008001200160020002400
Flight Time(Secs) 0.14 0.28 0.57 1.21 1.93 2.74 3.66 4.73
Penetration(mm@30°) 133 123 112 99 86 75 64 54
Penetration(mm@0°) 154 143 130 115 100 87 74 63
Hit Probability(%) 98 98 98 93 69 39 22 8


 
7.62cm Sprgr Patr 39
(AP40 Armour Piercing Tungsten Cored) 		76.20mm 4.07Kg 990M/Sec
Quoted Penetration 118mm @ 500mtr/30° ( ≈ 136mm/0°)
Range(Mtr)1002004008001200160020002400
Flight Time(Secs) 0.1 0.21 0.44 0.95 1.55 2.28 3.18 4.3
Penetration(mm@30°) 161 148 132 112 94 77 62 49
Penetration(mm@0°) 187 171 153 130 109 90 72 57
Hit Probability(%) 98 98 98 98 85 57 25 15



7.62cm Sprgr Patr 39
(HE High Explosive) 		76.20mm 6.03Kg 450M/Sec 0.550Kg explosive
Maximum Range 9000 Mtr
Range(Mtr)5001000150020002500300035004000
Flight Time(Secs) 1.22 2.72 4.58 6.99 10.19 14.67 21.4 32.59
Direct Fire
Range(Mtr)1002004008001200160020002400
Flight Time(Secs) 0.23 0.46 0.96 2.08 3.41 5.01 6.99 9.47
Hit Probability(%) 98 98 98 64 25 6 3 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% 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.

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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