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Britain
Medium M4A3 105mm (Sherman IVB)

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The Sherman IVB M4A3 was a similar shape to the M4 but had a welded hull and was powered by a Ford GAA-III engine producing 500HP.


General Details
Specifications
Operational Date(s)1944
Ordnance classification
Quantity Produced3039
Weightunknown
Crew5
M.G's small3
M.G's large(>10mm)n/a
Length5.95 mtr
Width2.63 mtr
Height2.84 mtr
Engine Details/Performance
Max Road Speed26 mph
Max Cross Country Speed15 mph
Range Road130 miles
Range Cross Countryunknown
Fuel TypePetrol
Fuel Capacity168 gal
Horse Power450 hp
Power/Weightunknown
General Information
The Sherman IVB M4A3 was a similar shape to the M4 but had a welded hull and was powered by a Ford GAA-III engine producing 500HP.
The cast turret carrying the 105mm Close Support howitzer.
As with the earlier Sherman I the drive sprocket was at the front, the track went under 3 double bogie wheels onto the idler, then back over 3 return rollers.

Armour Details
Turret
Front75mm@(75mm)
Side65mm@(65mm)
Rear50mm@(50mm)
Top25mm@90°(25mm)
Superstructure
Front50mm@45°(71mm)
Side50mm@(50mm)
Rear38mm@(38mm)
Top19mm@90°(19mm)
Hull
Front40mm@45°(57mm)
Side40mm@(40mm)
Rear38mm@(38mm)
Top19mm@90°(19mm)
Armour (x)mm @ (y)° (Effective mm @ 0°)
Effective Armour - Maximum 75 mm - Minimum 19 mm



Weapon Details
Flag
105mm Howitzer M3A1 L/18 Blank
Manufactured1942 - unknown
Calibre105mm
LengthL/18
 
Ammunition Details
Name/Id Calibre Weight MVelocity Explosive Content
AP(AP)
105mm 14.9Kg 310M/Sec
Range(Mtr)1002004008001200160020002400
Flight Time(Secs) 0.33 0.66 1.34 2.79 4.37 6.09 7.97 10.04
Penetration(mm@30°) 56 52 48 43 38 33 29 25
Penetration(mm@0°) 65 61 56 50 44 39 34 29
Hit Probability(%) 98 98 90 39 15 3 2 0



M1 Shell(HE)
105mm 19.08Kg 472M/Sec 2.180Kg explosive
Maximum Range 11250 Mtr
Range(Mtr)10002000300040005000600070008000
Flight Time(Secs) 2.34 5.23 8.9 13.69 20.22 29.67 44.51 71.19
Burst radius Infantry in open 99% kill4 mtr Burst radius Infantry in open 66% kill8 mtr
Burst radius Infantry in open 33% kill20 mtr  Armour Penetration inc roof at 1 mtr6 mm
An explosion within 4 mtr of infantry in the open will cause 99% casualties - lethal.
An explosion within 8 mtr of infantry in the open will cause > 66% casualties and could damage some AFV's.
An explosion within 20 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 6 mm of the tank armour including the roof.


 
HC BE M84 Shell(SMOKE)
105mm 19.02Kg 0M/Sec
Range(Mtr)1002004008001200160020002400
Flight Time(Secs)
Penetration(mm@30°) 0
Penetration(mm@0°)
Hit Probability(%)

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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