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Britain
Cruiser Mk VIII (Cromwell I/II/III)
Ordnance classification - A27M

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The Cruiser Mk VIII was designed in 1943, manufactured by Leyland based on the existing fully tracked Centaur and was in use from 1944 to 1953.

Photo of Cruiser Mk VIII (Cromwell I/II/III)
Cruiser Mk VIII(Cromwell I/II/III) scale illustration

General Details
Specifications
Operational Date(s)1944 - 1953
Ordnance classificationA27M
Quantity Produced3066
Weight27.5 tonne
Crew5
M.G's small1
M.G's large(>10mm)n/a
Length6.40 mtr
Width2.92 mtr
Height2.49 mtr
Engine Details/Performance
Max Road Speed40 mph
Max Cross Country Speed22 mph
Range Road166 miles
Range Cross Country66 miles
Fuel TypePetrol
Fuel Capacity110 gal
Horse Power600 hp
Power/Weight21 hp/tonne
General Information
The Cruiser Mk VIII was designed in 1943, manufactured by Leyland based on the existing fully tracked Centaur and was in use from 1944 to 1953.

The vehicle was powered by Rolls Royce 'Meteor V12' petrol powerplant producing 600 HP which could drive the vehicle on roads at up to 40 mph with a range of about 166 miles before refuelling. Its cross country performance was good providing a max speed of about 22 mph and a range of about 66 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 110 mm of flat plate at 100 metres

These early models were the upgraded Centaur with the original Leyland 450hp engine replaced by the 600hp Rolls-Royce Merlin engine

Armour Details
Turret
Front76mm@(76mm)
Side63mm@(63mm)
Rear57mm@(57mm)
Top20mm@81°(20mm)
Superstructure
Front63mm@(63mm)
Side32mm@(32mm)
Rear32mm@(32mm)
Top20mm@90°(20mm)
Hull
Front57mm@(57mm)
Side32mm@(32mm)
Rear32mm@(32mm)
Top20mm@90°(20mm)
Armour (x)mm @ (y)° (Effective mm @ 0°)
Effective Armour - Maximum 76 mm - Minimum 20 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
Number of Rounds 2000
 
 
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
Number of Rounds 64
 
 
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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