CN 105-57

Last updated
CN 105-57
Kuerassier-Panzer Dez2006B.jpg
An Austrian SK-105A2 Kürassier fitted with the CN 105 G1 gun.
Type Tank gun
Place of originFrance
Service history
In service1957–present
Used byAustria and the Netherlands
Production history
DesignerEFAB Bourges
Designed1957
Manufacturerarsenal de Bourges (ABS)
Produced1958
VariantsCN 105 G1
Specifications
Mass1,210 kg (2,670 lb)
Length4.622 m (15 ft 2 in)

Shell 105×528mm. R
Caliber 105 mm (4.134 in)
Breech semi-automatic horizontal sliding-wedge
Recoil 368 mm (14.5 in)
Elevation -8° to +12°
Traverse 360°
Rate of fire 8-12 rounds per minute
Muzzle velocity 800 m/s (2,600 ft/s) with shaped-charge round
1,430 m/s (4,700 ft/s) with the APFSDS round
Maximum firing range8,000 m (8,700 yd) (with HE shell)
Feed systemtwo six-rounds ammunition drums and automatic rammer or manually
SightsM213

The CN-105-57, also known as CN 105/57 or D1504, [1] is a light French 105 mm tank gun.

Contents

Design

The CN 105-57 is a light 105 mm rifled tank gun originally designed to be mounted on light tanks with oscillating turret such as the French AMX-13 and the Austrian SK-105 Kurassier. It uses the same conventional ammunition as the longer and heavier CN 105 F1 but smaller and lighter propellant charges with shorter cartridges cases enable it to be fitted into the FL 12, FL 15 and FL 20 light tanks oscillating turrets. [2] Other changes to the gun include a horizontal breechblock, a muzzle brake, and a single-cylinder recoil mechanism together with a single hydropneumatic recuperator.

The 105 mm L44/57 FTR gun produced in Argentina at the Fábrica Militar «Río Tercero» (FM «RT»), Río Tercero, Córdoba, which was a copy of the French CN-105-57 gun. [3]

Ammunition

CN 105 G1

The Giat Industries 105 mm G1 is a further development of the 105 mm CN 105/57 which is installed in the French FL 12, FL 15 and FL 20 oscillating turrets. The modification enables the weapon to fire the 105 mm OFL 105 G1 APFSDS ammunition. The ordnance is fitted with a new single baffle muzzle brake, a thermal sleeve, a fume extractor and semi-automatic horizontal breech mechanism.

Additional specifications

References

  1. Tauzin, Michel. "Tome 9 L'armement de gros calibre" (PDF). www.irsem.fr (in French). Archived from the original (PDF) on 15 March 2023. Retrieved 5 January 2022.
  2. Foss, Christopher (1993). Jane's Armoured Fighting Vehicle Retrofit Systems 1993-94. London: ane's Information Group. p. 33. ISBN   978-0710610799.
  3. https://tanks-encyclopedia.com/coldwar-argentina-sherman-repotenciado/ [ bare URL ]