Britain Inf Tank Mk II C.S. (Matilda IV C.S.)

World War 2 Tank and Gun Database

The Inf Tank Mk II C.S. was an Infantry Tank designed in 1937, it was based on the fully tracked Matilda chassis and was in use from 1940 to 1943. It was commonly called a Matilda IV C.S..

General Details (Infantry Tank)

Specifications
Operational Date(s)	1940 - 1943
Quantity Produced	0
Weight	26.5 tonne
Crew	4
M.G's small	1
M.G's large(>10mm)	n/a
Length	5.69 mtr
Width	2.62 mtr
Height	2.46 mtr
Engine Details/Performance
Max Road Speed	15 mph
Max Cross Country Speed	8 mph
Range Road	101 miles
Range Cross Country	62 miles
Fuel Type	Diesel
Fuel Capacity	56 gal
Horse Power	190 hp
Power/Weight	7 hp/tonne

General Information

The Inf Tank Mk II C.S. was an Infantry Tank designed in 1937, it was based on the fully tracked Matilda chassis and was in use from 1940 to 1943. It was commonly called a Matilda IV C.S..

The vehicle was powered by Leyland 'Diesel 190HP' diesel powerplant producing 190 HP which could drive the vehicle on roads at up to 15 mph with a range of about 101 miles before refuelling. Its cross country performance was adequate providing a max speed of about 8 mph and a range of about 62 miles.

It was armed with 1 light machine gun. Its main armament consisted of an Ordnance Q.F. 3inch Howitzer weighing 6.300 kg.

The Matilda IV CS was a complete new design to replace the Matilda I Infantry tank, which had been superceeded by advances in tank designs.

The turret was of a shaped design which held the 3 inch howitzer.

This version had a few minor improvements over the Matilda III CS.

Armour Details

Turret
Front	75mm	@	11°	(76mm)
Side	75mm	@	0°	(75mm)
Rear	75mm	@	0°	(75mm)
Top	20mm	@	90°	(20mm)

Superstructure
Front	48mm	@	67°	(123mm)
Side	70mm	@	30°	(81mm)
Rear	55mm	@	25°	(61mm)
Top	20mm	@	90°	(20mm)

Hull
Front	78mm	@	10°	(79mm)
Side	65mm	@	0°	(65mm)
Rear	55mm	@	25°	(61mm)
Top	20mm	@	90°	(20mm)

Armour (x)mm @ (y)° (Effective mm @ 0°)

Effective Armour - Maximum 123 mm - Minimum 20 mm


Weapon Details
	Ordnance Q.F. 3inch Howitzer (Field Gun)
		Manufactured	unknown - 1945
		Calibre	76.20mm

Ammunition Details
Name/Id	Calibre Weight MVelocity					Explosive Content
3 inch howitzer AP (HE High Explosive)	76.20mm 6.3Kg 650M/Sec					0.600Kg explosive
Range(Mtr)	1000	2000	3000	4000	5000	6000	7000	8000
Flight Time(Secs)	1.69	3.67	5.94	8.46	11.2	14.13	17.2	20.39
lateral dispersion means the side to side variation of the shell from the aiming point
50%(CEP) of shells land within +/- (mtr)	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00
80% of shells land within +/- (mtr)
95% of shells land within +/- (mtr)
range dispersion means the back to front variation of the shell from the aiming point
50%(CEP) of shells land within +/- (mtr)
80% of shells land within +/- (mtr)
95% of shells land within +/- (mtr)
Direct Fire
Range(Mtr)	100	200	400	800
Flight Time(Secs)	0.16	0.32	0.65	1.36
Hit Probability(%)	93	93	90	77
Blast/Fragmentation Effects
Burst radius Infantry in open 99% kill	3 mtr	Burst radius Infantry in open 66% kill						6 mtr
Burst radius Infantry in open 33% kill	15 mtr	Armour Penetration inc roof at 1 mtr						1 mm
An explosion within 3 mtr of infantry in the open will cause 99% casualties - lethal.
An explosion within 6 mtr of infantry in the open will cause > 66% casualties and could damage some AFV's.
An explosion within 15 mtr of infantry in the open will cause 33% casualties.
The blast effect of this shell exploding within 1 mtr of an armoured vehicle will penetrate 1 mm of the tank armour including the roof.

About Penetration Figures

All penetration figures in this database are calculated to a common standard based on German WWII testing criteria (complete penetration with functioning fuze). This allows direct comparison between all nations' guns.

Original national test figures would be higher for some nations due to different criteria:

German: 1.00? (baseline - strictest)
British: 1.02? (slightly looser)
American: 1.05? (50% mass through plate)
Soviet: 1.10? (75% mass through plate)

For example, a Soviet gun showing 159mm here would be published as ~175mm in Soviet documents, and a German gun showing 120mm would be published as 120mm in German documents. The 159mm figure is directly comparable to the German 120mm - the Soviet gun really was more powerful.

National Testing Standards
German:	1.00? - Complete penetration, fuze functions (strictest)
British:	1.02? - Complete penetration
American:	1.05? - 50% of shell mass through plate
Soviet:	1.10? - 75% of shell mass through plate
All database figures are normalized to German standard for direct comparison. Multiply by the factor above to see original national test figures.

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.