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United States
3 inch Gun Motor Carriage M10A1

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The 3 inch Gun Motor Carriage M10A1 based on the existing fully tracked SP Gun and was in use from 1943.

Flag of World War 2 United States

General Details
Specifications
Operational Date(s)1943
Quantity Produced1413
Weightunknown
Crew5
M.G's smalln/a
M.G's large(>10mm)1
Length6.03 mtr
Width3.08 mtr
Height2.49 mtr
Engine Details/Performance
Max Road Speed30 mph
Max Cross Country Speed20 mph
Range Road200 miles
Range Cross Country80 miles
Fuel TypePetrol
Fuel Capacity164 gal
Horse Power454 hp
Power/Weightunknown
General Information
The 3 inch Gun Motor Carriage M10A1 based on the existing fully tracked SP Gun and was in use from 1943.

It was armed with 1 large machine gun consisting of 0.5 inch Browning Machine Gun M2 Its main armament consisted of a 3 in Gun M7 L/53 which could penetrate 114 mm of flat plate at 800 metres .

The M10A1 was based on a modified Sherman Hull with thinner armour and a more powerful gun, the power for the M10A1 was supplied by a 454HP Ford petrol engine.

The turret was manually rotated, so was not as fast to rotate as other models.

Armour Details
Turret
Front60mm@45°(85mm)
Side25mm@45°(35mm)
Rear25mm@45°(35mm)
Topn/a
Superstructure
Front37mm@45°(52mm)
Side25mm@45°(35mm)
Rear30mm@(30mm)
Top20mm@90°(20mm)
Hull
Front37mm@45°(52mm)
Side25mm@45°(35mm)
Rear30mm@(30mm)
Top20mm@90°(20mm)
Armour (x)mm @ (y)° (Effective mm @ 0°)
Effective Armour - Maximum 85 mm - Minimum 20 mm



Weapon Details
Flag
0.5 inch Browning Machine Gun M2
(Machine Gun)
Blank
Calibre12.70mm
Rate of Fire480 rpm
Number of Rounds 300
 
 
Ammunition Details
Name/Id Calibre Weight MVelocity Explosive Content
MG
(AP Standard Small Arms)
12.70mm 0.04Kg 884M/Sec
Quoted Penetration 29mm @ 100mtr/0°
Range(Mtr)1002004008001200160020002400
Flight Time(Secs) 0.13 0.28 0.67 2.46
Penetration(mm@30°) 19 15 12 5
Penetration(mm@0°) 22 18 14 6
Hit Probability(%) 98 98 98 48


Weapon Details
Flag
3 in Gun M7 L/53 Blank
Calibre76.20mm
LengthL/53
Number of Rounds 54
 
 
Ammunition Details
Name/Id Calibre Weight MVelocity Explosive Content
AP
(AP Armor Piercing)
76.20mm 7Kg 792M/Sec
Quoted Penetration 84mm@2000m
Range(Mtr)1002004008001200160020002400
Flight Time(Secs) 0.13 0.26 0.53 1.13 1.8 2.56 3.42 4.42
Penetration(mm@30°) 132 122 112 98 86 74 64 53
Penetration(mm@0°) 153 142 130 114 100 86 74 62
Hit Probability(%) 98 98 98 96 77 44 25 15

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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