The CN-105-57, also known as CN 105/57 or D1504, is a light French
105 mm
1 (one, unit, unity) is a number representing a single or the only entity. 1 is also a numerical digit and represents a single unit of counting or measurement. For example, a line segment of ''unit length'' is a line segment of length 1. I ...
tank gun
A tank gun is the main armament of a tank. Modern tank guns are high-velocity, large-caliber artilleries capable of firing kinetic energy penetrators, high-explosive anti-tank, and cannon-launched guided projectiles. Anti-aircraft guns can also ...
.
Design
The CN 105-57 is a light 105 mm rifled tank gun originally designed to be mounted on
light tanks
A light tank is a tank variant initially designed for rapid movements in and out of combat, to outmaneuver heavier tanks. It is smaller in size with thinner armor and a less powerful main gun, tailored for better tactical mobility and ease of ...
with oscillating turret such as the French
AMX-13
The AMX-13 is a French light tank produced from 1952 to 1987. It served with the French Army, as the Char 13t-75 Modèle 51, and was exported to more than 26 other nations. Named after its initial weight of 13 tonnes, and featuring a tough and r ...
and the Austrian
SK-105 Kurassier SK-1 or SK1 may refer to:
* Casio SK-1, a small sampling keyboard
* Garant 30k SK-1, an East German armored vehicle
* Hammond SK1, a modern keyboard
* SK-1 spacesuit, an early Russian spacesuit
* sK1 (program), a fork of the Skencil vector graphic ...
.
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.
Other changes to the gun include a horizontal breechblock, a muzzle brake, and a single-cylinder recoil mechanism together with a single hydropneumatic recuperator.
Ammunition
*OCC 105 F1 : a 10.85 kg non-rotating shaped-charge round with a muzzle velocity of 800 m/s.
*OE 105 : a 12.1 kg high-explosive shell with a muzzle velocity of 700 m/s.
*OECL 105 : a 11.7 kg illuminating round with a muzzle velocity of 295 m/s.
*OFUM 105 : a 12.8 kg smoke shell with a muzzle velocity of 695 m/s.
*OFL 105 G1 : a 3.41 kg APFSDS using the same 1.8 kg penetrator as the 105 mm
OFL 105 F3, it has a muzzle velocity of 1430-1475 m/s and penetrates 120 mm of RHA steel at impact angle of 67° at 1000 m..
*105 MM MLE 57 APFSDS-T : an Austrian APFSDS designed by Hirtenberger Defense Systems of
Austria
Austria, , bar, Östareich officially the Republic of Austria, is a country in the southern part of Central Europe, lying in the Eastern Alps. It is a federation of nine states, one of which is the capital, Vienna, the most populous ...
, it has a muzzle velocity of 1410 m/s and penetrates 250 mm of RHA steel at impact angle of 30° at 1000 m.
CN 105 G1
The
Giat Industries
Nexter Systems (formerly known as GIAT Industries or ''Groupement des Industries de l'Armée de Terre'', Army Industries Group) is a French government-owned weapons manufacturer, based in Roanne, Loire.
Group organization
The Nexter group is ...
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
*Factory designation: D1504
*Overall lengtht: 4.622 m
*Rifling twist: 7°10' right hand
*Number of grooves: 32
*Muzzle brake: single baffle
*Recoil mechanism: single hydraulic brake cylinder
*Recuperator: single hydraulic recuperator
*Maximum recoil length: 388 mm
*Overall weight: 1210 kg
*Recoiling gun mass: 1065 kg
*Firing mechanism: mechanical
References
{{DEFAULTSORT:Cn-105-57
105 mm artillery
Tank guns of France
Cold War weapons of France
Military equipment introduced in the 1950s