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Cruiser Mk VIII (Cromwell II)

General Details
Specifications
Manufacture Date(s)1943
Quantity Produced0
Weightunknown
Crew5
M.G's small1
M.G's large(>10mm)0
Length6.40 mtr
Width2.92 mtr
Height2.49 mtr
Engine Details/Performance
Max Road Speed40 mph
Max Cross Country Speed18 mph
Range Road173 miles
Range Cross Country0 miles
Fuel TypePetrol
Fuel Capacity139 gal
Horse Power600 hp
Power/Weightunknown
General Information
The Cromwell tank was designed as a heavy cruiser tank that could rapidly move and provide good A/T performance, in appearance it looked like the Cavalier.

The vehicle had a rear Rolls Royce Meteor engine producing 600hp driving the tracks, towards the main front idler over the 5 large road wheels, round the idler and back under the roadwheels in the standard Christie style.

The Mark II had modifications to improve cross country performance with wider tracks than the Mk I, the hull machine gun was removed to increase ammunition storage.

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


Weapon Details
Ordnance Q.F. 6pdr 7cwt MKII MKIV
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 Quoted Penetration
 
AP(AP) 57mm 2.84Kg   900M/Sec 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) 86 84 81 75 69 63 56 50
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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