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Britain
Humber Armoured Car Mk IV |
| The Humber Armoured Car Mk IV was designed in 1938, manufactured by Rootes Motors based on the existing 4 x 4 drive Humber Mk 1 and was in use from 1939 to 1945. |
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| | Specifications | | Operational Date(s) | 1939 - 1945 | | Quantity Produced | 2000 | | Weight | 5.2 tonne | | Crew | 3 | | M.G's small | 1 | | M.G's large(>10mm) | 1 | | Length | 4.15 mtr | | Width | 2.08 mtr | | Height | 2.31 mtr | | Engine Details/Performance | | Max Road Speed | 40 mph | | Max Cross Country Speed | 20 mph | | Range Road | 220 miles | | Range Cross Country | 99 miles | | Fuel Type | Petrol | | Fuel Capacity | unknown | | Horse Power | 90 hp | | Power/Weight | 17 hp/tonne | | | General Information | The Humber Armoured Car Mk IV was designed in 1938, manufactured by Rootes Motors based on the existing 4 x 4 drive Humber Mk 1 and was in use from 1939 to 1945.
The vehicle was powered by Rootes '6 cylinder' petrol powerplant producing 90 HP which could drive the vehicle on roads at up to 40 mph with a range of about 220 miles before refuelling. Its cross country performance was good providing a max speed of about 20 mph and a range of about 99 miles.
It was armed with 1 light machine gun , a BESA Machine Gun 7.92mm. and 1 large machine gun. Its main armament consisted of a 37mm Antitank Gun M6 which could penetrate 45 mm of flat plate at 800 metres .
This was the standard Humber Armoured car but with the Besa 15mm machine gun replaced by the US M5 or M6 37 mm gun. | |
| | Turret | | Front | | 14mm | @ | 20° | (15mm) | | Side | | 14mm | @ | 20° | (15mm) | | Rear | | 14mm | @ | 0° | (14mm) | | Top | | 10mm | @ | 90° | (10mm) |
| | Superstructure | | Front | | 14mm | @ | 40° | (18mm) | | Side | | 14mm | @ | 15° | (14mm) | | Rear | | 14mm | @ | 60° | (28mm) | | Top | | 10mm | @ | 90° | (10mm) |
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| Hull | | Front | | 14mm | @ | 40° | (18mm) | | Side | | 14mm | @ | 15° | (14mm) | | Rear | | 14mm | @ | 30° | (16mm) | | Top | | 10mm | @ | 90° | (10mm) |
| | Armour (x)mm @ (y)° (Effective mm @ 0°) | | Effective Armour - Maximum 28 mm - Minimum 10 mm |
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| Weapon Details |
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BESA Machine Gun 7.92mm
(Machine Gun) |
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| | History | |
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| | Developed by BSA from the Czechoslovak ZB vz.53 heavy machine gun which used the German 7.92×57mm Mauser ammunition. It was mostly used as the main armament of the Light Tank Mk VIC and Armoured cars such as the Humber Mk I to Mk III.
This 7.92mm gun was used in the armoured divisions as their supply lines were separated from the infantry who used .303 bullets. Once the British started capturing German ammunition this could be immediately used in these tank machine guns. |
| | Manufactured | 1939 - 1966 |
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| | Calibre | 7.92mm |
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| | Length | L/93 |
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| | Rate of Fire | 450 rpm |
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| | Number of Rounds | 2000
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| Ammunition Details |
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| Name/Id |
Calibre Weight MVelocity |
Explosive Content |
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Cartridge SA, 7.92
(AP Standard Small Arms)
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7.92mm 0.011Kg 785M/Sec | |
| Quoted Penetration 11mm @ 1000mtr/0° |
| Range(Mtr) | 100 | 200 | 400 | 800 | 1200 | 1600 | 2000 | 2400 |
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| Flight Time(Secs) |
0.16 |
0.37 |
1.1 |
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| Penetration(mm@30°) |
10 |
8 |
5 |
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| Penetration(mm@0°) |
12 |
10 |
6 |
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| Hit Probability(%) |
98 |
98 |
98 |
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Cartridge SA, 7.92
(BALL Standard Small Arms)
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7.92mm 0.012Kg 785M/Sec | |
| Range(Mtr) | 100 | 200 | 400 | 800 | 1200 | 1600 | 2000 | 2400 |
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| Flight Time(Secs) |
0.15 |
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| Penetration(mm@30°) |
2 |
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| Penetration(mm@0°) |
3 |
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| Hit Probability(%) |
98 |
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| Weapon Details |
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37mm Antitank Gun M6
(Anti Tank Gun) |
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| | History | |
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| | This was the Tank mounted version of the 37mm M3 |
| | Manufacturer | Watervliet Arsenal |
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| | Calibre | 37mm |
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| | Number of Rounds | 40
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| Ammunition Details |
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| Name/Id |
Calibre Weight MVelocity |
Explosive Content |
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AP M74 Shot
(AP Armor Piercing)
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37mm 0.86Kg 885M/Sec | |
| Quoted Penetration 36mm @ 500mtr/0° |
| Range(Mtr) | 100 | 200 | 400 | 800 | 1200 | 1600 | 2000 | 2400 |
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| Flight Time(Secs) |
0.12 |
0.24 |
0.51 |
1.15 |
2.01 |
3.19 |
4.93 |
7.73 |
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| Penetration(mm@30°) |
61 |
55 |
48 |
38 |
30 |
22 |
16 |
10 |
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| Penetration(mm@0°) |
71 |
64 |
56 |
45 |
35 |
26 |
19 |
12 |
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| Hit Probability(%) |
98 |
98 |
98 |
96 |
64 |
25 |
8 |
2 |
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HE M63 Shell
(HE High Explosive)
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37mm 0.73Kg 792M/Sec | 0.039Kg explosive |
| Maximum Range not shown as gun elevation is limited |
| Range(Mtr) | 100 | 200 | 400 | 800 | 1200 | 1600 | 2000 | 2400 |
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| Flight Time(Secs) |
0.13 |
0.27 |
0.57 |
1.29 |
2.25 |
3.56 |
5.51 |
8.63 |
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| Direct Fire |
| Range(Mtr) | 100 | 200 | 400 | 800 | 1200 | 1600 | 2000 | 2400 |
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| Flight Time(Secs) |
0.13 |
0.27 |
0.57 |
1.29 |
2.25 |
3.56 |
5.51 |
8.63 |
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| Hit Probability(%) |
98 |
98 |
98 |
93 |
57 |
22 |
3 |
1 |
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| Blast/Fragmentation Effects |
| Burst radius Infantry in open 99% kill | 0 mtr |
Burst radius Infantry in open 66% kill | 1 mtr |
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| Burst radius Infantry in open 33% kill | 3 mtr |
Armour Penetration inc roof at 1 mtr | 0 mm |
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| An explosion within 1 mtr of infantry in the open will cause > 66% casualties and could damage some AFV's. |
| An explosion within 3 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. |
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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.
© WWIITanks 1980-2024
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![photo of BESA Machine Gun 7.92mm from Wikipedia](javascript:launch("https://upload.wikimedia.org/wikipedia/commons/b/bd/Besa_machine_gun.JPG"))
