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Inf Tank Mk IV (Churchill VI)

General Details
Specifications
Manufacture Date(s)1941 - 1945
Quantity Produced300
Weightunknown
Crew5
M.G's small2
M.G's large(>10mm)0
Length7.51 mtr
Width3.49 mtr
Height2.77 mtr
Engine Details/Performance
Max Road Speed16 mph
Max Cross Country Speed8 mph
Range Road162 miles
Range Cross Country95 miles
Fuel TypePetrol
Fuel Capacity190 gal
Horse Power350 hp
Power/Weightunknown
General Information
The Churchill Infantry tank was designed as a tank that could cope with movement through heavily shelled areas, and provide adequate protection for the crew.

The vehicle was layed out in a similar way to the tanks from the First World War with the rear Bedford 350hp engine driving the tracks, to the front via small idlers to the fron main idler, then via 11small sprung road wheels. The first vehicles had many mechanical faults and hence many subsequent modifications.

The MkVI was upgraded to use the 75mm gun replacing the 6pdr.

Armour Details
Turret
Front88mm@0°(88mm)
Side76mm@0°(76mm)
Rear89mm@0°(89mm)
Top16mm@90°(16 mm)
Superstructure
Front88mm@20°(94mm)
Side76mm@0°(76mm)
Rear64mm@0°(64mm)
Top16mm@90°(16 mm)
Hull
Front38mm@70°(111mm)
Side76mm@0°(76mm)
Rear64mm@0°(64mm)
Top16mm@90°(16 mm)
Armour (x)mm @ (y)° (Effective mm @ 0°)
Effective Armour - Maximum 111 mm - Minimum 16 mm


Weapon Details
Ordnance Q.F. 75mm
History

This was a temporary fix to the problem of 6pdr guns not having a powerful enough HE shell. It was created by boring out the British 57mm 6pdr to take the American 75mm AP/HE shells, which reduced the Anti Tank performance but provided HE support.

Manufactured1943 - 1945
Calibre75mm
LengthL/32
 
Ammunition Details
Name/Id Calibre Weight MVelocity Quoted Penetration
 
AP(AP) 75mm 6.58Kg   618M/Sec
Range(Mtr)1002004008001200160020002400
Flight Time(Secs) 0.16 0.33 0.68 1.45 2.31 3.29 4.41 5.71
Penetration(mm) 79 78 76 71 67 63 59 54
Hit Probability(%) 98 98 98 88 54 25 15 3

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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