One attempt to improve the armament of the M4 Sherman came from the Ballistics Research Laboratory (BRL) of Aberdeen. The study was to develop a 3-Inch gun which had a higher chamber capacity than the standard 3-Inch Gun M7. This was to raise the muzzle velocity to over 3000 ft/sec and increase the penetration power to that of the 90 mm Gun M3, if not surpass it.
The new gun used a light outer barrel in combination with a heavy chamber. Thus, when it came to balancing the weapon on its center of gravity, the breech would not extend very far into the turret and increasing the space available. This weapon was highly comparable to the successful British 17-pounder. This 3-Inch gun was to be an alternative solution should it not be feasible to mount a 90 mm gun on an M4 Sherman, but the idea ultimately fell through entirely.
The M4 BRL is simply an M4A3 with this new modified weapon. It can also use the low-profile hull, as pictured above, that was meant for BRL's 90 mm proposal.
Guns: 3-Inch Modified Gun
Engines: GM 6046 (410 hp)
Turrets (Turret Armor (mm)): M4A3 Modified (76/51/51)
Turrets (Turret Armor (mm)): M4A3 Modified (76/51/51)
Suspensions/Alternate Hulls, Total Weight (metric tons): M4A3 VVS Reduced (??)
Hull Armor (mm): 51/20/20
Top Speed: 42 km/h
Crew: 5 (Driver; Gunner; Loader; Commander; Radio)
See Also: M4 90V
Sources:
See Also: M4 90V
Sources:
Hunnicutt, R. P., Sherman, 1995
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