Italy
120 mm/45 (4.7") Model 1931
Updated 26 May 2012
A low-powered gun used only on submarines.  Used a horizontal sliding block.
WNIT_47-45_m1931_Pietro_Micca_pic.jpg

120 mm guns on Minelayer Submarine Pietro Micca
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Gun Characteristics
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Designation 120 mm/45 (4.7") Model 1931
Ship Class Used On Balilla, Fieramosca, Micca and Calvi Classes
Date of Design 1931
Date In Service 1933
Gun Weight 3.2 tons (3,484 kg)
Gun Length oa N/A
Number of Grooves N/A
Bore Length 212.6 in (5.400 m)
Rifling Length N/A
Grooves N/A
Lands N/A
Twist N/A
Chamber Volume N/A
Rate Of Fire 8 rounds per minute
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Ammunition
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Type Separate
Projectile Types and Weights HE - 48.5 lbs. (22 kg) 
AP - 51.0 lbs. (23.15 kg)
Bursting Charge N/A
Projectile Length N/A
Propellant Charge N/A
Muzzle Velocity 2,395 fps (730 mps)
Working Pressure N/A
Approximate Barrel Life N/A
Ammunition stowage per gun N/A
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Range
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Elevation With 48.5 lbs. (22 kg) HE shell
Range @ 35 degrees 15,860 yards (14,500 m)
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Mount / Turret Data
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Designation Single open mounts
Weight  N/A
Elevation -4 / +35 degrees
Elevation Rate N/A
Train about +150 / -150 degrees
Train Rate N/A
Gun recoil N/A
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Data from
"Naval Weapons of World War Two" by John Campbell
"Italian Warships of World War II" by Aldo Fraccaroli
Page History

16 May 2006 - Benchmark
26 May 2012 - Updated to latest template