Italy
100 mm/43 (3.9") Model 1927
Updated 26 May 2012
An unsuccessful attempt by OTO to reduce the size of the 100 mm guns for submarine use.  Replaced during World War II with standard deck-mounted 100 mm/47 submarine guns.
WNIT_39-43_m1927_Brin_pic.jpg

Submarine Brin pictured during the war
All submarines armed with 100 mm/43 guns had them mounted in the conning tower.  These were later replaced by deck-mounted 100 mm/47 guns.
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Gun Characteristics
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Designation 100 mm/43 (3.9") Model 1927
Ship Class Used On Foca and Brin classes
Date of Design 1927
Date In Service 1937
Gun Weight N/A
Gun Length oa about 170 in (4.300 m)
Bore Length N/A
Rifling Length N/A
Grooves N/A
Lands N/A
Twist N/A
Chamber Volume N/A
Rate Of Fire 8 - 10 rounds per minute
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Ammunition
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Type Fixed
Complete Round Weight N/A
Projectile Types and Weights HE - 30.4 lbs. (13.8 kg)
Bursting Charge N/A
Projectile Length N/A
Propellant Charge N/A
Muzzle Velocity 2,625 fps (800 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 30.4 lbs. (13.8 kg) HE shell
Range @ 35 degrees 12,000 yards (11,000 m)
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Mount / Turret Data
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Designation Single Mountings
   Submarines (1):  Model 1938 (?)
Weight  N/A
Elevation -5 / +35 degrees
Elevation Rate Manually operated, only
Train 360 degrees
Train Rate Manually operated, only
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
11 September 2011 - Corrected typographical error, redid photograph
26 May 2012 - Updated to latest template