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| CN 105 F1 | |
|---|---|
 A French AMX-30B2 sporting a 105 rifled tank gun | |
| Type | Tank gun |
| Place of origin | France |
| Service history | |
| In service | 1966–present |
| Used by | Bosnia, Chile,Croatia,Cyprus, France, Greece,Israel,Qatar,Saudi Arabia, Spain,United Arab Emirates,Venezuela |
| Wars | Gulf War |
| Production history | |
| Designed | 1962 |
| Specifications | |
| Mass | 2,470 kg |
| Length | 5.90 metres (19.4 ft) |
| Crew | 2 (gunner, loader) |
| Shell | 105×617mmR |
| Calibre | 105 mm (4.134 in) |
| Breech | vertical sliding wedge |
| Recoil | 385 mm |
| Elevation | -8° to +20° |
| Traverse | 360° |
| Muzzle velocity | 1000 m/s with HEAT round 1525 m/s withAPFSDS round[1] |
| Effective firing range | 5000 m[2] |
| Sights | M271 coaxial telescope |
TheCanon de 105 mm modèle F1 (orCN-105-F1) is a French105 mmtank gun used with theAMX-30.
The CN 105 F1 was designed at the end of the 1950s by the arsenal ofBourges (EFAB) under the project name D1512, its development was completed in 1962 and the gun was registered as 105 Mle 62[3] (an abbreviated version of105 mm 1962 Model) which in turn took the designation of CN 105 F1 after being fitted with its armoredgun mantlet.
As theFrench Army was relying on the OCC 105 F1[i] (obus G) as main as its only armor-piercing ammunition at that time, the rifling of CN 105 F1 gun barrel was given a relatively slow twist of one turn in 25 calibers to minimise the spin imparted to theHEAT projectile, but this made it unsuitable for firingAPDS,[4] although compatible with all other types ofNATO105×617mm ammunition such asAPFSDS, the OFL 105 F1 being the first French-made APFSDS and was fielded in November 1981.[5]
The CN 105 F1 is a monoblock steel 105-millimeter (4.1 in) cannon[6] protected from bending with a magnesium alloy thermal sleeve.[7] The F1 is fitted with a semi-automatic vertical sliding wedgebreechblock, though fitted without a muzzle brake. Unlike the similarL7 tank gun, the F1 uses acompressed air scavenging system instead of abore evacuator. The recoil mechanism uses two symmetrically opposed hydraulic brake cylinders with a single hydropneumatic recuperator cylinder.[8] An electrical firing system is fitted.
Source:[3]
A shorter barrel version designated D1504 was fitted to IsraeliM51 Shermans[2] and locally known as the CN 105 D1, some of which have been sold toChile.The gun saw extensive combat use in the 1967Six Days War and the 1973Yom Kippur War, scoring many victories in engagements with Syrian and Egyptian forces. In order to fit in the T23 turret of the M51, a larger muzzle brake was added to reduce the recoil length.
Argentina also produced a version of this gun, similar to the Israeli version, for use on theirRepotenciado upgrade of ex-BritishSherman Firefly tanks, known locally as the L44/57 FTR 105 mm. Although these tanks still had the original smaller Sherman turret, the extended Firefly bustle gave enough space for the recoil within a limited elevation arc, but left a very cramped turret. Ammunition was sourced fromFabricaciones Militares.
