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Britain
Cruiser Mk VI (Crusader III)
Ordnance classification - A15

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The Cruiser Mk VI was designed in 1939, manufactured by Nuffield based on the existing fully tracked A13 III(Covenanter) and was in use from 1941 to 1944.

Photo of Cruiser Mk VI (Crusader III)
Cruiser Mk VI(Crusader III) scale illustration

General Details
Specifications
Operational Date(s)1941 - 1944
Ordnance classificationA15
Quantity Produced5300
Weight20 tonne
Crew5
M.G's small1
M.G's large(>10mm)n/a
Length6.05 mtr
Width2.66 mtr
Height2.26 mtr
Engine Details/Performance
Max Road Speed28 mph
Max Cross Country Speed15 mph
Range Road112 miles
Range Cross Country44 miles
Fuel TypePetrol
Fuel Capacity120 gal
Horse Power340 hp
Power/Weight17 hp/tonne
General Information
The Cruiser Mk VI was designed in 1939, manufactured by Nuffield based on the existing fully tracked A13 III(Covenanter) and was in use from 1941 to 1944.

The vehicle was powered by Nuffield 'Liberty' petrol powerplant producing 340 HP which could drive the vehicle on roads at up to 28 mph with a range of about 112 miles before refuelling. Its cross country performance was good providing a max speed of about 15 mph and a range of about 44 miles.

It was armed with 1 light machine gun , a BESA Machine Gun 7.92mm. Its main armament consisted of an Ordnance Q.F. 6pdr 7cwt MKII MKIV which could penetrate 90 mm of flat plate at 400 metres

The Crusader tank was derived from the same A13 basis as the Covenanter, the Crusader was less inclined to overheating than the Covenanter, but still suffered from a great deal of breakdowns and drive train issues.

Armour Details
Turret
Front49mm@(49mm)
Side24mm@45°(34mm)
Rear30mm@32°(35mm)
Top12mm@90°(12mm)
Superstructure
Front30mm@38°(38mm)
Side14mm@(14mm)
Rear28mm@11°(29mm)
Top7mm@90°(7mm)
Hull
Front20mm@60°(40mm)
Side14mm@(14mm)
Rear28mm@11°(29mm)
Top7mm@90°(7mm)
Armour (x)mm @ (y)° (Effective mm @ 0°)
Effective Armour - Maximum 49 mm - Minimum 7 mm



Weapon Details
Flag
BESA Machine Gun 7.92mm Blank
photo of BESA Machine Gun 7.92mm from Wikipedia
History
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.
Manufactured1939 - 1966
Calibre7.92mm
LengthL/93
Rate of Fire450 rpm
 
Ammunition Details
Name/Id Calibre Weight MVelocity Explosive Content
Cartridge SA, 7.92(AP)
7.92mm 0.012Kg 785M/Sec
Range(Mtr)1002004008001200160020002400
Flight Time(Secs) 0.15
Penetration(mm@30°) 2
Penetration(mm@0°) 3
Hit Probability(%) 98


Weapon Details
Flag
Ordnance Q.F. 6pdr 7cwt MKII MKIV Blank
photo of Ordnance Q.F. 6pdr 7cwt MKII MKIV from Wikipedia
History
The 6pdr Mk II—differed from the pre-production Mk I in having a shorter L/43 barrel, because of shortage of suitable lathes. The subsequent Mk IV was fitted with an L/50 barrel, with muzzle brake.
Manufactured1942 - 1945
Calibre57mm
LengthL/43
 
Ammunition Details
Name/Id Calibre Weight MVelocity Explosive Content
AP(AP)
57mm 2.84Kg 900M/Sec
Quoted Penetration 68mm@915m
Range(Mtr)1002004008001200160020002400
Flight Time(Secs) 0.11 0.23 0.48 1.03 1.69 2.47 3.42 4.61
Penetration(mm@30°) 95 87 77 66 56 46 37 29
Penetration(mm@0°) 110 101 90 77 65 54 43 34
Hit Probability(%) 98 98 98 98 81 48 25 8

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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