SA 49
The 75 SA 49 (French: 75 mm Semi-Automatique Modèle 1949; English: 75 mm Semi-Automatic 1949 Model) is a French 75 mm low-recoil rifled gun specially designed to be mounted on the EBR eight-wheeled armored reconnaissance vehicle.
| SA 50 | |
|---|---|
 An EBR model 1951 armed with the 75 mm SA 49 gun. | |
| Type | Rifled tank gun |
| Place of origin | France |
| Service history | |
| In service | 1951-1964 |
| Used by | French Army |
| Wars | Algerian War |
| Production history | |
| Designer | Atelier de Construction de Puteaux (APX) |
| Designed | 1950 |
| Manufacturer | Atelier de Construction de Puteaux (APX) |
| Produced | 1951-1953 |
| No. built | 800 |
| Variants | CN 90 F2 (D 924) |
| Specifications | |
| Mass | 448 kg |
| Length | 2.583 m (8 ft 5.7 in) |
| Barrel length | 34 calibres |
| Shell | 75×350mm R |
| Shell weight | 6.8 kg (AP Shot M61) |
| Calibre | 75 mm (2.95 in) |
| Action | semi-automatic vertical sliding-wedge breech |
| Breech | vertical sliding-wedge |
| Recoil | 300 mm |
| Elevation | -10° to +15° |
| Traverse | 360° |
| Rate of fire | up to 14 rounds per minute |
| Muzzle velocity | 600 m/s |
| Maximum firing range | 3000 m |
| Sights | APX L 52 |
History
The SA 49 was made with the idea of re-using the stockpiled 75x350mm R ammunition previously used by the French 75 mm Mle 97 gun and the US 75 mm M3 and M6 guns (already used by the French Army) while featuring the same external ballistics as the latter.[1] The development effort has been then concentrated on reducing of the recoil force and its integration in the FL 11 oscillating turret.
Second life
In the early 1960s, the decision was taken to rebore the SA 49 to the internal dimensions of the D 921A 90 mm low-pressure rifled gun (CN 90 F1) of the AML-90, allowing the retroffited EBR to also use the powerful OCC 90 EMP Mle 61 fin-stabilized HEAT shell fired at a muzzle velocity of 750 m/s.[2] A single baffle muzzle brake replaced the original double baffle muzzle brake.
The re-bored 75 SA 49 took the factory designation of D 924 and was later known as CN 90 F2 (French: CaNon de 90 millimètres modèle F2; English: 90 millimeters gun F2 Model). After a preliminary study carried out in 1963, 650 FL 11 turrets were transformed between 1964 and 1968.
Ammunition
- PCOT 40 : a 6.41 kg APCBC-T with a muzzle velocity of 625 m/s.
- OE 49 : a 6.3 kg high explosive shell with a muzzle velocity of 598 m/s
- M61 APC-T : US-made APCBC-T round
- M61A1 APC-T : US-made APCBC-HE-T filled with 15 g of explosive D.
- M48 HE : US-made high explosive shell.
Additional specifications
- Total length: 2.943 m
- Rifling length: 2.583 m (L/34)
- Rifling twist: 7°, right twist
- Number of grooves: 24
- Muzzle brake: double baffle
- Recoil mechanism: two hydropneumatic retarders
- Recuperator: single spring
- Maximum recoil length: 320 mm
- Recoiling gun mass: 320 kg
- Barrel weight: 194 kg
- Priming: electrical or manual
References
- Tauzin, Michel. "Tome 9 L'armement de gros calibre" (PDF). www.irsem.fr (in French). Retrieved 5 January 2022.
- Petit, Pierre (2013). "Panhard EBR l'exception à la française". Trucks & Tanks Magazine (in French) (n°37): 35.
External links
- COMHART Tome 9 L’armement de gros calibre (history of the development of French tank guns and artillery of the 20th century by former French weapon scientists)
See also
- SA 50 - the direct successor to this gun, also mounted on the EBR (1954 model)