|Puteaux SA 18|
Preserved SA 18 in the Saumur armour museum
|Place of origin||France|
|Wars||World War I, World War II|
|Manufacturer||Atelier de Construction de Puteaux|
|Rate of fire||15 rounds per minute|
|Muzzle velocity||600 m/s (with APCR ammunition)|
The Puteaux SA 18 was a French single-shot, breech-loading cannon, used from World War I onward, primarily mounted on combat vehicles.
It was a simple, reliable weapon with a high rate of fire. It was primarily intended to be used against infantry and machine-gun nests, due to its low muzzle velocity which proscribed anti-armour use. Though armour penetration was poor, even as late as 1939 it was sufficient to combat light armoured vehicles. The gun was operated by one soldier, and found easy to use with a low incidence of jamming. It was sighted on target with a separate scope attached to the left side of the weapon.
The barrel length was 21 calibres (L/21). The maximum rate was 15 rounds per minute, with the effective rate 10 round per minute.
This gun was standard on French light tanks, being mounted on the Renault FT in World War I. In World War II, it was used on the Renault R-35, Hotchkiss H-35 and H-38, FCM-36 and several types of French armored cars, mainly the White-Laffly WL-50.
In the Polish Army the wz.18 Puteaux gun was used on the Renault FT light tanks and Renault R-35 and Hotchkiss H-35, Peugeot armoured cars, and the Samochód pancerny wz.28, Samochód pancerny wz. 29 and Samochód pancerny wz. 34 armoured cars. It was also used on some Polish riverine craft and armoured trains.
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