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The 7.62cm Pak 36(r) Gw 38(t) was a Self Propelled Anti Tank vehicle designed in 1941, manufactured by Böhmisch-Mährische Maschinenfabrik AG, it was based on the fully tracked Czech LT Vz 38 chassis and was in use from 1942 to 1945. It was commonly called a Marder III.

Flag of World War 2 Germany
Photo of 7.62cm Pak 36(r) Gw 38(t) (Marder III)
7.62cm Pak 36(r) Gw 38(t)(Marder III) scale illustration

General Details (SP Anti Tank)
Specifications
Operational Date(s)1942 - 1945
Ordnance classificationSdKfz 139
Quantity Produced363
Weight10.67 tonne
Crew4
M.G's small1
M.G's large(>10mm)n/a
Length4.61 mtr
Width2.14 mtr
Height2.40 mtr
Engine Details/Performance
Max Road Speed25 mph
Max Cross Country Speed15 mph
Range Road116 miles
Range Cross Country46 miles
Fuel TypePetrol
Fuel Capacityunknown
Horse Power125 hp
Power/Weight11 hp/tonne
General Information
The 7.62cm Pak 36(r) Gw 38(t) was a Self Propelled Anti Tank vehicle designed in 1941, manufactured by Böhmisch-Mährische Maschinenfabrik AG, it was based on the fully tracked Czech LT Vz 38 chassis and was in use from 1942 to 1945. It was commonly called a Marder III.

The vehicle was powered by Praga 'EPA/2' petrol powerplant producing 125 HP which could drive the vehicle on roads at up to 25 mph with a range of about 116 miles before refuelling. Its cross country performance was good providing a max speed of about 15 mph and a range of about 46 miles.

It was armed with 1 light machine gun. Its main armament consisted of a 7.62cm Pak 36(r) L/51 weighing 6.030 kg and with a maximum range of 9,000 metres.


Armour Details
Turret
Front11mm@31°(13mm)
Side11mm@12°(11mm)
Rearn/a
Topn/a
Superstructure
Front50mm@17°(52mm)
Side16mm@12°(16mm)
Rear10mm@65°(24mm)
Top10mm@90°(10mm)
Hull
Front50mm@16°(52mm)
Side15mm@(15mm)
Rear15mm@16°(16mm)
Top18mm@90°(18mm)
Armour (x)mm @ (y)° (Effective mm @ 0°)
Effective Armour - Maximum 52 mm - Minimum 18 mm

Weapon Details
Flag
7.62cm Pak 36(r) L/51
7.62cm Panzerabwehrkanone 36(r) L/51
(translates as Anti Tank Gun)
Blank
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 0.56 1.17 1.83 2.53 3.27 4.05
Penetration(mm@30°) 98 95 89 79 70 62 54 48
Penetration(mm@0°) 113 110 103 92 81 72 64 56
Hit Probability(%) 93 93 90 83 64 35 23 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 0.42 0.86 1.33 1.82 2.34 2.88
Penetration(mm@30°) 129 126 120 110 100 91 84 76
Penetration(mm@0°) 149 146 140 127 116 106 97 89
Hit Probability(%) 93 93 93 87 77 64 52 35

7.62cm Sprgr Patr 39
(HE High Explosive)
76.20mm 6.03Kg 450M/Sec 0.550Kg explosive
Maximum Range 9000 Mtr
Range(Mtr)10002000300040005000600070008000
Flight Time(Secs) 2.44 5.31 8.58 12.22 16.18 20.4 24.85 29.46
lateral dispersion means the side to side variation of the shell from the aiming point
50%(CEP) of shells land within +/- (mtr) 0.27 0.53 0.80 1.07 1.33 1.60 1.87 2.13
80% of shells land within +/- (mtr) 0.35 0.68 1.02 1.37 1.70 2.05 2.39 2.73
95% of shells land within +/- (mtr) 0.53 1.04 1.57 2.10 2.61 3.14 3.67 4.17
range dispersion means the back to front variation of the shell from the aiming point
50%(CEP) of shells land within +/- (mtr) 0.33 0.67 1.00 1.33 1.67 2.00 2.33 2.67
80% of shells land within +/- (mtr) 0.42 0.86 1.28 1.70 2.14 2.56 2.98 3.42
95% of shells land within +/- (mtr) 0.65 1.31 1.96 2.61 3.27 3.92 4.57 5.23
Direct Fire
Range(Mtr)1002004008001200160020002400
Flight Time(Secs) 0.23 0.46 0.94 1.96 3.08 4.29
Hit Probability(%) 93 93 87 64 23 8
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.

About Penetration Figures

All penetration figures in this database are calculated to a common standard based on German WWII testing criteria (complete penetration with functioning fuze). This allows direct comparison between all nations' guns.

Original national test figures would be higher for some nations due to different criteria:

  • German: 1.00? (baseline - strictest)
  • British: 1.02? (slightly looser)
  • American: 1.05? (50% mass through plate)
  • Soviet: 1.10? (75% mass through plate)

For example, a Soviet gun showing 159mm here would be published as ~175mm in Soviet documents, and a German gun showing 120mm would be published as 120mm in German documents. The 159mm figure is directly comparable to the German 120mm - the Soviet gun really was more powerful.

National Testing Standards
German:1.00? - Complete penetration, fuze functions (strictest)
British:1.02? - Complete penetration
American:1.05? - 50% of shell mass through plate
Soviet:1.10? - 75% of shell mass through plate
All database figures are normalized to German standard for direct comparison. Multiply by the factor above to see original national test figures.

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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