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Inf Tank Mk IV (Churchill I A22)

General Details
Specifications
Manufacture Date(s)1941 - 1945
Quantity Produced303
Weightunknown
Crew5
M.G's small1
M.G's large(>10mm)0
Length7.51 mtr
Width3.28 mtr
Height2.49 mtr
Engine Details/Performance
Max Road Speed16 mph
Max Cross Country Speed8 mph
Range Road128 miles
Range Cross Country75 miles
Fuel TypePetrol
Fuel Capacity150 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 turret contained the 2pdr gun and a 3 inch howitzer in the hull front.

Armour Details
Turret
Front88mm@0°(88mm)
Side76mm@0°(76mm)
Rear89mm@0°(89mm)
Top16mm@90°(16 mm)
Superstructure
Front88mm@20°(94mm)
Side76mm@0°(76mm)
Rear50mm@0°(50mm)
Top16mm@90°(16 mm)
Hull
Front38mm@70°(111mm)
Side76mm@0°(76mm)
Rear50mm@0°(50mm)
Top16mm@90°(16 mm)
Armour (x)mm @ (y)° (Effective mm @ 0°)
Effective Armour - Maximum 111 mm - Minimum 16 mm


Weapon Details
Ordnance Q.F. 2pdr
History

Used both as an Anti Tank gun and as a Tank gun the 2pdr was first used by the Belgians in 1939 with the majority of the British guns were captured by the Germans at Dunkirk and given their designation of 4.0 cm Pak 192(e) or 4.0 cm Pak 154(b).

Manufactured1936 - 1944
Calibre40mm
LengthL/50
Rate of Fire22rpm
 
Ammunition Details
Name/Id Calibre Weight MVelocity Quoted Penetration
 
AP(AP) 40mm 1.08Kg   792M/Sec 53mm@455m
Range(Mtr)1002004008001200160020002400
Flight Time(Secs) 0.13 0.27 0.56 1.26 2.17 3.37 5.06 7.58
Penetration(mm) 58 56 53 47 41 35 29 23
Hit Probability(%) 98 98 98 93 60 25 6 2

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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