France
75 mm/50 (2.95") Model 1922, 1924 and 1927
Updated 29 August 2015

Adapted from the SP 75 mm gun by shortening the barrel and given a high-elevation mounting, this AA weapon was obsolete by the start of World War II.  Fired fixed rounds.

I have been unable to determine the differences between the Model years.  Possibly these were slight improvements.

WNFR_3-50_m1922_Bearn_pic.jpg

Experimental Carrier Béarn in 1937
The 75 mm (2.95") guns are in the mountings just in front of the island and below the flight deck

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Gun Characteristics
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Designation 75 mm/50 (2.95") Model 1922, 1924 and 1927
Ship Class Used On
(see Note)
Bretagne, Béarn, Duquesne, Suffren, Jeanne D'Arc, Duguay-Trouin, Chacal (2100 tonnes) and Bourrasque (1500 tonnes) classes
Date Of Design 1922, 1924 and 1927
Date In Service 1926
Gun Weight 1.05 tons (1.07 mt)
Gun Length oa N/A
Bore Length 147.6 in (3.75 m)
Rifling Length N/A
Grooves N/A
Lands N/A
Twist N/A
Chamber Volume N/A
Rate Of Fire
(see Note 1)
8 - 15 rounds per minute
Notes:

1) The theoretical rate of fire was 15 rounds per minute but 8 rounds per minute was the practical rate.

2) Of the Suffren class, only Suffren herself carried these guns,  the other members of her class carried the 90 mm/50 Model 1926.

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Ammunition
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Type Fixed
Weight of Complete Round 26.5 lbs. (12 kg)
Projectile Types and Weights
(see Note 1)
HE - 13.07 lbs. (5.93 kg)
Starshell - N/A
Bursting Charge N/A
Projectile Length about 12.8 in (32.5 cm)
Complete round 38.1 in (96.67 cm)
Propellant Charge 4.81 lbs. (2.18 kg) BM5
Cartridge - 13.4 lbs. (6.08 kg)
Cartridge 27.1 x 4.33 in (688.5 x 110 mm)
Muzzle Velocity 2,789 fps (850 mps)
Working Pressure N/A
Approximate Barrel Life N/A
Ammunition stowage per gun
(see Note 2)
Duguay-Trouin:  135 rounds
Duquesne and Suffren:  500 rounds
Jeanne D-Arc:  400 rounds
Bourrasques:  180 HE and 120 starshell
Others:  N/A
Notes:

1) Actual projectile designations:
      HE - OEA Mle 1925
      Starshell - OEcl Mle 1923

2) Duguay-Trouin outfit for four guns was 540 rounds HE, 120 rounds illumination and 90 practice rounds.  Jeanne D-Arc outfit was 1,600 rounds and 20 starshells

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Range
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Elevation 13.07 lbs. (5.93 kg) HE Shell
Range @ 40 degrees 15,420 yards (14,100 m)
AA Ceiling @ 90 degrees about 26,250 feet (8,000 m)
Effective AA Range 24,600 feet (7,500 m)
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Mount / Turret Data
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Designation Single open mountings
   Bretagne (8), Bearn (6), Duguay-Trouin (4), Chacal (2), Bourrasque (1), Duquesne (8), Suffren (8) and Jeanne D-Arc (4):  Model 1922
Weight  N/A
Elevation -10 / +90 degrees
Elevation Rate N/A
Train about +150 / -150 degrees
Train Rate N/A
Gun recoil N/A
Loading Angle -10 / +75 degrees
Note:  The Bourrasque class had their gun removed during refits in the 1930s.
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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
"French Light Cruisers" article by Jean Guigliani and Albert Moreau in "Warships International No. 3, 2001"
"French Cruisers:  1922 - 1954" and "French Destroyers:  Torpilleurs d'Escadre & Contre-Torpilleurs 1922 - 1956" both by John Jordan and Jean Moulin
"Battleships of World War Two," "Cruisers of World War Two" and "Destroyers of World War Two" all by M.J. Whitley
Page History

24 March 2007 - Benchmark
03 March 2012 - Updated to latest template
28 March 2013 - Added use on destroyer classes and minor details
29 March 2015 - Minor additions