France
100 mm/45 (3.9") Model 1925
Updated 01 April 2013
Designed for use on ocean-going submarines.  Breech mechanism was of concentric ring construction.
WNFR_39-45_m1925_Casablanca_pic.jpg

Submarine Casablanca
WNFR_39-45_m1925_sketch_pic.jpg
 
 

100 mm/45 Model 1925 gun in SMCA Model 1925 Mounting
Sketch in the collection of Robert Dumas
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Gun Characteristics
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Designation 100 mm/45 (3.9") Model 1925
Ship Class Used On Redoutable "1,500 tonnes" class

Some oil tankers
Date Of Design 1925
Date In Service 1929
Gun Weight N/A
Gun Length oa 185.3 in (4.707 m)
Bore Length 177.2 in (4.500 m)
Rifling Length N/A
Grooves N/A
Lands N/A
Twist N/A
Chamber Volume N/A
Rate Of Fire about 10 rounds per minute
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Ammunition
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Type Fixed
Weight of Complete Round 53.6 lbs. (24.29 kg)
Projectile Types and Weights HE - 32 lbs. (14.45 kg)
Bursting Charge N/A
Projectile Length N/A
HE Complete Round - 39.4 in (100.1 cm)
Propellant Charge 9.7 lbs. (4.4 kg)
Muzzle Velocity HE - 2,493 fps (760 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 32 lbs. (14.5 kg) HE Shell
No information available No information available
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Mount / Turret Data
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Designation Single Mounts
   Redoubtable (1):  SMCA M1925
   Oil tankers (1):  CA M1925
Weight N/A
Elevation -10 / +70 degrees
Rate of Elevation Manual Only
Train about +150 / -150 degrees
Rate of Train Manual Only
Gun Recoil 13.8 in (35 cm)
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Data from
"Naval Weapons of World War Two" by John Campbell
"Navies of the Second World War - The French Navy" by Henri le Masson
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"The French Navy under Steam" picture essay in "United States Naval Institute Proceedings" Vol. 80, No. 7, July 1954
Page History

25 February 2012 - New datapage
01 April 2013 - Added gun and ammunition information