French
90 mm/50 (3.5") Model 1926
Updated 09 October 2006
This gun was an improved AAA weapon intended to replace the 75 mm (2.95") AA guns used on older ships.  Used an autofretted barrel and a semi-automatic Schneider breech mechanism.
WNFR_35-50_m1926_Emile_Bertin_pic.jpg

The after section of Emile Bertin showing the 90 mm AA guns in both single and twin mountings with a triple 152 mm/55 turret on the right
Detail from a MB Photograph
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Gun Characteristics
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Designation 90 mm/50 (3.5") Model 1926
Ship Class Used On Cruisers:  Suffren, Émile Bertin, La Galissonnière and De Grasse Classes
Net-layer Gladiateur and some escorts of the Élan and Chamois classes
Fitted as emergency AA on Jean Bart
Date Of Design 1926
Date In Service about 1935
Gun Weight N/A
Gun Length N/A
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 12 - 15 rounds / minute
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Ammunition
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Type Fixed
Weight of Complete Round 39.7 lbs. (18 kg)
Projectile Types and Weights HE - 20.96 lbs. (9.51 kg)
Bursting Charge N/A
Projectile Length 15.2 in (38.5 cm)
Propellant Charge 6.83 lbs. (3.1 kg) BM5
Muzzle Velocity 2,789 fps (850 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 20.96 lbs. (9.51 kg) HE Shell
Range @ 45 degrees 16,885 yards (15,440 m)
AA Ceiling @ 80 degrees 34,800 feet (10,600 m)
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Mount / Turret Data
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Designation Single Mount
   Suffren class [except Dupleix] (8) and Emile Bertin (2):  Model 1926

Twin Mount
   Dupleix (4), Emile Bertin (1), La Galissonnière (4), De Grasse(3) and Jean Bart (5):  Model 1930
Weight  N/A
Elevation -5 / +80 degrees
Elevation Rate N/A
Train about +150 / -150 degrees
Train Rate N/A
Gun recoil N/A
Note:  These mountings had automatic rammers but they were apparently difficult to load at angles over 60 degrees, thus limiting their effectiveness as AA weapons.
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Data from
"Naval Weapons of World War Two" by John Campbell
"Battleships:  Allied Battleships in World War II" by W.H. Garzke, Jr. and R.O. Dulin, Jr.
"Cruisers of World War Two" by M.J. Whitley