Post-war design used as AA on the Richelieu class battleships. These mountings were radar-controlled and had improved shell-handling capabilities compared to the pre-war 100 mm (3.9") Model 1930.
Barrel was an autofretted monobloc type with a semi-automatic sliding wedge breech mechanism.
|Designation||100 mm/55 (3.9") Model 1945|
|Ship Class Used On||Richelieu Class
Prototype on Albatros
|Date Of Design||1945|
|Date In Service||1948|
|Gun Weight||4,056 lbs. (1,840 kg) including breech|
|Gun Length oa||N/A|
|Bore Length||216.5 in (5.500 m)|
|Rate Of Fire||20 - 25 rounds per minute|
|Weight of Complete Round||50.5 lbs. (22.9 kg)|
|Projectile Types and Weights 1 2||HE Model 1945: 29.36 (13.32 kg)
HE Model 1951: 29.36 (13.32 kg)
Complete round: 42.8 in (108.8 cm)
|Cartridge Case||100 X 1,145 mm (light alloy)|
|Propellant Charge||8.84 lbs. (4.01 kg) BM7|
|Muzzle Velocity||2,805 fps (855 mps)|
|Working Pressure||17.8 tons/in² (2,800 kg/cm²)|
|Approximate Barrel Life||N/A|
|Ammunition stowage per gun||1,000 rounds 3|
- ^HE rounds used German Zt Z S/30 mechanical time fuzes, later versions had a very sensitive nose fuze. The Model 1951 was intended for night firings.
Actual French designations HE OEA Mle 1945 (day) HE OEA Mle 1951 (night) Starshell OEcl Mle 1945
- ^Outfit for Jean Bart in January 1957 consisted of 8,906 HE rounds (day), 3,000 HE rounds (night) and 600 Starshells.
|40 degrees||18,590 yards (17,000 m)|
|45 degrees||18,880 yards (17,260 m)|
|AA Ceiling||about 37,070 feet (11,300 m) max|
|Weight||58,532 lbs. (26,550 kg)|
|Elevation||-8 / +70 degrees|
|Rate of Elevation||N/A|
|Train||-90 / +90 degrees|
|Rate of Train||N/A|
These mountings were controlled by four gyro-stabilised directors that were patterned after German designs. Train and elevation were controlled via a Ward Léonard RPC system and there were also semi-automatic and manual backup systems.
- ^Albatros was a destroyer converted to a gunnery training ship during 1947 - 1948. As part of the conversion, two of her 138.6 mm Model 1927 guns were landed and she was equipped with a variety of weapons including a German 10.5 cm Dop. L. C/37 mounting. This was replaced in 1951 with the prototype for the CAD Model 1945 which in turn was replaced by a production mounting in 1953.
- "Les Cuirassés: Dunkerque, Strasbourg, Richelieu & Jean Bart" by Robert Dumas
- "Battleships: Allied Battleships in World War II" by W.H. Garzke, Jr. and R.O. Dulin, Jr.
- "French Battleships: 1922 - 1956" by John Jordan and Robert Dumas
- "French Destroyers: Torpilleurs d'Escadre & Contre-Torpilleurs 1922 - 1956" by John Jordan and Jean Moulin
Special help by Matthew Rodchenko
- 21 May 2006
- 29 November 2009
- Added photographs and information on projectiles
- 08 October 2015
- Added information regarding Albatros