Canon de 155 mm Modèle 1920

The Canon de 155 mm Modèle 1920 was a medium-caliber naval gun used as the primary armament on a number of French cruisers during World War II.

Canon de 155 mm Modèle 1920
TypeNaval gun
Place of originFrance
Service history
In service1920—1966
Used byFrance
WarsWorld War II
Production history
Designed1920
Specifications
Mass8.87 metric tons
Barrel length8.87 meters (29.1 ft) 50 caliber

Shellseparate-loading, bagged charge
Shell weight56.5 kilograms (125 lb)[1]
Caliber155 millimeters (6.1 in)[2]
BreechWelin interrupted-screw breech
Elevation-5° to +40°
TraverseModel 1921: -140° to +140°[3]
Rate of fire3-5 rpm[4]
Muzzle velocity850 meters per second (2,800 ft/s)[5]
Maximum firing range26,100 meters (28,500 yd) at 40°[6]

Description

The Canon de 155 mm Modèle 1920 was built with a liner, autofretted A tube, two part jacket and breech ring. There was a short collar at the breech end of the liner which screwed into the A tube and a Welin breech block which opened upwards. Useful life expectancy was 700 effective full charges (EFC) per barrel. These guns were carried both in twin turrets aboard cruisers and in single casemates aboard aircraft carriers. The twin turrets were slightly unusual in that each gun had its own cradle and they could be elevated or depressed independently.[7]

Ammunition

Ammunition was of separate loading type with two powder charges and a projectile.

The gun was able to fire:

Ship classes that carried the Canon de 155 mm Modèle 1920 include:

Notes

  1. Campbell, Naval Weapons of WWII, p.292.
  2. Campbell, Naval Weapons of WWII, p.292.
  3. Campbell, Naval Weapons of WWII, p.292.
  4. Campbell, Naval Weapons of WWII, p.292.
  5. Campbell, Naval Weapons of WWII, p.292.
  6. Campbell, Naval Weapons of WWII, p.292.
  7. Campbell, Naval Weapons of WWII, p.292.
  8. The 155 mm/50 (6.1") Model 1920 at Naval Weapons.Com

References

  • Campbell, John (1985). Naval Weapons of World War Two. Naval Institute Press. ISBN 0-87021-459-4.
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