This was the standard major-caliber AAA weapon of the Marine Nationale during the 1950s and was used on many cruisers and destroyers. It was a completely new design that took advantage of the availability of US ammunition for both surface and anti-aircraft uses. The design was significant in that it was the first high-angle destroyer mounting ever used by the French, reflecting hard-earned experience gained during the war that destroyers lacking DP armament were highly vulnerable to aircraft attack.
|Designation||127 mm/54 (5") Model 1948|
|Ship Class Used On||Surcouf (T47), Duperré (T53), De Grasse and Colbert classes|
|Date Of Design||1948|
|Date In Service||1956|
|Bore Length||About 270.0 in (6.858 m)|
|Chamber Volume||825.38 in3 (13.525 dm3)|
|Rate Of Fire||15 - 18 rounds per minute|
|Projectile Types and Weights||See table below|
|Bursting Charge||See table below|
|Propellant Charge||18.5 lbs. (8.188 kg)
Cartridge: 34.1 lbs (15.5 kg)
|Muzzle Velocity||HC: 2,650 fps (808 mps) 1|
|Working Pressure||18.5 tons/in2 (2,758 kg/cm2) 1|
|Approximate Barrel Life||N/A|
|Ammunition stowage per gun||De Grasse and Colbert: 300 rounds
|AAC Mark 41||69.45 lbs. (31.505 kg)||7.75 lbs. (3.515 kg)|
|HC Mark 41||69.33 lbs. (31.448 kg)||7.75 lbs. (3.515 kg)|
|Illum Mark 48||69.2 lbs. (31.389 kg)||Parachute Flare|
|HE Com Mark 42||70.00 lbs. (31.751 kg)||2.14 lbs. (0.971 kg)|
|VT Mark 41||69.19 lbs. (31.384 kg)||7.87 lbs. (3.570 kg)|
|45 degrees||24,060 yards (22,000 m)|
|AA Ceiling @ 85 degrees||29,530 feet (9,000 m)|
Although this weapon used standard USN 5"/54 (127 mm) ammunition, its stated range was significantly less than that for USN 5"/54 (12.7 cm) guns for unknown reasons. It is possible that the range is for "average gun" velocities rather than for "new gun" velocities.
|Weight||48 tons (49 mt)|
|Elevation||-10 / +80 degrees|
|Rate of Elevation||N/A|
|Train||about -150 / +150 degrees|
|Rate of Train||N/A|
- ^Five destroyers of the Surcouf class were also rearmed with 100 mm Model 1968 guns during the late 1960s and early 1970s.
- ^All 127 mm guns were removed from Colbert when she was converted to a missile ship between 1970 and 1972, being replaced with a Masurca missile system and two 100 mm Model 1968 guns.
- "Naval Weapons of World War Two" by John Campbell
- "The Naval Institute Guide to World Naval Weapon Systems 1991/1992" by Norman Friedman
- "French Cruisers: 1922 - 1956" by John Jordan and Jean Moulin
- "Surcouf: The French Postwar Destroyers" articles by John Jordan in "Warship Volume IX"