Hotchkiss 13.2 mm machine gun

Hotchkiss 13.2 mm machine gun
*Mitrailleuse Hotchkiss de 13,2 mm*
Hotchkiss 13.2 mm machine gun ; Mitrailleuse Hotchkiss de 13,2 mm
	A mitrailleuse de 13.2 mm CA mle 1930 in Batey ha-Osef Museum, Tel Aviv, Israel.
Type	Heavy machine gun
Place of origin	France
Service history
Used by	See Users
Wars	World War II
Production history
Designed	1929
Manufacturer	Hotchkiss et Cie
Specifications
Mass	37.5 kg (83 lbs); single gun, stripped
Length	1.67 m (5 ft 6 in)
Barrel length	1 m (3 ft 3 in)
Shell	13.2×99mm Hotchkiss Long (intr. 1929); 13.2x96mm Hotchkiss Short (intr. 1935);
Caliber	13.2 mm
Action	Gas operated
Elevation	-10° to +90°
Traverse	360°
Rate of fire	450 rpm (cyclic); 200-250 rpm (sustained)
Muzzle velocity	800 m/s (2,625 ft/s)
Effective firing range	4,200 m (13,800 ft) AA ceiling
Maximum firing range	7.2 km (4.5 mi) at 45°[1]
Feed system	30-round box magazine, or 15-round feed strip

The Hotchkiss 13.2 mm machine gun (French: Mitrailleuse Hotchkiss de 13,2 mm), also known as the Hotchkiss M1929 machine gun (Mle 1929, Mle 1930, etc), was a heavy machine gun, primarily intended for anti-aircraft use, designed and manufactured by French arms manufacturer Hotchkiss et Cie from the late 1920s until World War II, which saw service with various nations' forces, including Italy and Japan where the gun was built under license.[2]

A dual gun pedestal mount of the Free French Navy

Development

In the 1920s, Hotchkiss developed a range of anti-aircraft automatic weapons in the 13.2, 25 and 37 mm calibers. They were all based on the same type of gas-operated action, similar to the one used in the 8 mm Hotchkiss Mle 1914 machine gun, which had proven extremely reliable during World War I and was still in service.

The 13.2 mm machine gun project was started in 1922 as an aircraft machine gun, but the French government classified the belt-fed version (while not funding its further development), and only the magazine version (only useful for ground and naval use) was allowed to be exported, starting from around 1927.[3]

Performance

The Hotchkiss M1929 machine gun had a cyclic rate of fire of 450 rounds per minute, but their practical sustained rate of fire was just 200-250 rounds per minute due to limited magazine capacity. The majority of Hotchkiss M1929 machine guns were fed by overhead, 30 round, curved box magazines. These magazines would run empty in 4 seconds, requiring frequent magazine changes which limited their rate of fire.

Cartridges

The Hotchkiss M1929 machine gun was initially chambered for the cartridge 13.2 × 99 mm Hotchkiss "Long", which essentially was a 12.7 × 99 mm Browning (.50 BMG) cartridge necked up to 13.2 mm caliber.[4] This cartridge however proved to wear out gun barrels too quickly and to alleviate this inconvenience Hotchkiss introduced a new cartridge for the M1929 machine gun in 1935, featuring a slightly shorter cartridge case and reworked projectile shape, becoming the cartridge 13.2 x 96 mm Hotchkiss "Short". The new cartridge was practically identical to the original 13.2 x 99 mm cartridge except for the length of the neck, reducing the full case length to 96 mm. This minimal change was done so that existing weapons and the production line did not require any modification to fire the new cartridge, but was sufficient to fix the barrel wear issue.

Configurations

The Hotchkiss M1929 machine gun came in a number of different configurations depending on their intended role. There were single, double and quadruple barreled anti-aircraft weapons on a high-angle pedestal and tripod mounts, as well as low-angle bipod mounts for anti-tank and heavy machine gun roles.

French infantry commanders, who had expressed interest in acquiring light anti-aircraft guns, refused to accept the 13.2 mm. They argued that the heavy bullets falling down could be dangerous to friendly troops, and preferred larger calibers for which self-destructing shells were available. But the 13.2 mm Hotchkiss saw extensive use as a naval gun and was also chosen by the French cavalry for some of its armored vehicles.

A Japanese 30 round box magazine
13.2 mm cartridges top to bottom:
13.2×99mm Hotchkiss Long
13.2×96mm Hotchkiss Short
13.2×92mmSR Mauser TuF
A quadruple naval mounting, as illustrated in US Patent 1700902 filed by Yves Le Prieur

Service

As a ground-based anti-aircraft weapon

The French Air Force used the M1929, designated as mitrailleuse de 13.2 mm CA mle 1930, for close-range defense of its airfields and other strategic places.

It came in two versions:

A single gun with a stock and pistol grip that came in a dual-purpose anti-aircraft/anti-armor mounting. It had a two-wheeled split-trailed carriage that weighed 117 kg (259 lb) empty and 155 kg (342 lb) with the machine-gun mounted. When the swing-arm the gun was affixed to was locked upwards, it could be used in an anti-aircraft mode. When the arm was collapsed and a bipod extended it could fire straight ahead in an anti-tank role. When the gun was packed up and the trails closed, it was towed behind its caisson, which was pulled by a horse or by the gunner.
A fixed tripod mount with a seat and anti-aircraft sight for the gunner. This came in single or twin mounts. The single mount weighted 120 kg (270 lb) empty, 160 kg (352 lb) mounted. The double mount weighed 225 kg (496 lb) empty, 300 kg (662 lb) mounted.

As a naval weapon

Early in World War II, the French, Italian and Japanese navies were using twin (CAD Mle 1929 - Contre Avions Double) and quadruple (CAQ mle 1929 - Contre Avions Quadruple) mountings on many of their warships. French warships that were refitted in the United States in 1943, such as the battleship Richelieu or the destroyer Le Terrible, had their 13.2 mm machine guns replaced by more powerful Oerlikon 20 mm cannons.

In Italy, the Società Italiana Ernesto Breda produced the gun under license as the Breda Mod.31 from 1931 onwards. It was used as an anti-aircraft gun aboard ships, submarines, and armored trains of the Royal Italian Navy. After World War II it was used on the patrol boats of the Guardia di Finanza.

The Spanish Navy bought the weapon in December 1935 and used it during the Civil War (where it was mounted on several Republican Navy destroyers and cruisers). The "Pirotecnia Militar" Army Ammunition plant (Sevilla) produced its cartridges after 1939.

As a ground weapon

Several self-propelled anti-aircraft combinations were tested in the 1930s, with Citroën-Kegresse or Berliet chassis, but none was mass-produced. The 13.2 mm Hotchkiss was used on the Belgian T15 and the French AMR 35 light tanks as well as on the White-Laffly AMD 80 armoured car and on fortifications. The Free French used field-modified self-propelled mountings, with guns recovered from French ships, in North-East Africa in 1942. The Breda Mod.31 was used as an anti-aircraft and heavy machine gun on command tanks of the Royal Italian Army as well as on L3/33 light tanks sold to Brazil. The Japanese mounted license-produced version of the gun on a number of Type 92 Heavy armored Cars which had initially been armed with only a pair of 6.5mm machine guns.

Users

Belgium
Brazil
France
Nazi Germany - Captured French guns were designated MG 271(f).
Greece - Some modified for larger magazine capacities and closed-bolt operation
Israel
Italy - Built under license as the Breda Model 1931 machine gun.
Japan - Built under license as the Type 93 heavy machine gun.[5]
Poland - Designated the wz.30.
Republic of China
Romania - 200 delivered before the Fall of France[6] and delivered by Germans from captured material
Spain
Sweden - License built Breda Model 1931 machine guns bought from Italy. Designated 13,2 mm kulspruta M/It (13,2 mm ksp M/It)[7]
Kingdom of Yugoslavia

Gallery

A wz.30 dual gun pedestal mount used on the Polish submarine ORP Żbik
The related Japanese Type 93 single mount
The related Japanese Type 93 double mount

References

Footnotes

"France 13.2 mm (0.5") Model 1929 - NavWeaps". www.navweaps.com. Retrieved 2019-03-30.
"Modern Firearms". 27 October 2010.
"HyperWar: The Machine Gun (Vol. I/Part IV)". www.ibiblio.org. Retrieved 10 August 2023.
"13,2x96 Hotchkis Short / MUNICION.ORG". www.municion.org. Archived from the original on 2019-03-30. Retrieved 2019-03-30.
Lai, Benjamin (29 Jun 2017). Shanghai and Nanjing 1937: Massacre on the Yangtze. Campaign 309. Osprey Publishing. p. 26. ISBN 9781472817495.
Mark Axworthy, London: Arms and Armour, 1995, Third Axis, Fourth Ally: Romanian Armed Forces in the European War, 1941–1945, p. 29
Amregister Fl, Ammunitionsregister för flottan, 1947 års upplaga. Stockholm: Ammunitionssektionen vid marinförvaltningens artilleribyrå. 1947.

Bibliography

Campbell, John (1985). Naval Weapons of World War Two. Annapolis, Maryland: Naval Institute Press. ISBN 0-87021-459-4.

French infantry weapons of World War II (1939-1940)
Sidearms	MAB Model D pistol Modèle 1892 revolver Pistolet automatique modèle 1935A Pistolet automatique modèle 1935S Ruby pistol Star Model 14
Rifles and carbines	MAS-36 rifle Lebel Model 1886 rifle Berthier rifle
Submachine guns	Erma EMP MAS-38
Machine guns and other larger weapons	FM 24/29 light machine gun St. Étienne Mle 1907 Hotchkiss M1909 Hotchkiss Mle 1914 machine gun Hotchkiss M1922 machine gun Hotchkiss M1929 machine gun Chauchat
Mortars	Lance Grenades de 50 mm modèle 37 Brandt Mle 1935 Brandt Mle 27/31
Grenades	F1 grenade VB rifle grenade
Cartridges used by France during World War II	8mm Lebel 7.5×54mm French .32 ACP .380 ACP 7.65mm Longue

French naval weapons of the Second World War
Battleship main armament	305 mm/45 Modèle 1906 330 mm/50 Modèle 1931 340 mm/45 Modèle 1912 380 mm/45 Modèle 1935
Cruiser main armament	138 mm/40 Modèle 1923 152 mm/55 Modèle 1930 155 mm/50 Modèle 1920 203 mm/50 Modèle 1924 203 mm/55 Modèle 1931
Destroyer and Aviso main armament	65 mm Modèle 1891 90 mm/50 Modèle 1926 100 mm/45 Modèle 1891 100 mm/45 Modèle 1933 130 mm/40 Modèle 1919 130 mm/40 Modèle 1924 130 mm/45 Modèle 1935 138 mm/45 Modèle 1893 138 mm/40 Modèle 1927 138 mm/55 Modèle 1910 138 mm/50 Modèle 1929
Secondary armament	57 mm/40 Modèle 1885 90 mm/50 Modèle 1926 100 mm/45 Modèle 1930 100 mm/55 Modèle 1945 130 mm/45 Modèle 1932 138 mm/55 Modèle 1910 152 mm/55 Modèle 1930
Submarine guns	75 mm/35 Modèle 1924 75 mm/35 Modèle 1927 100 mm/45 Modèle 1917 100 mm/45 Modèle 1925 100 mm/34 Modèle 1936 203 mm/50 Modèle 1924
Anti-aircraft weapons	7.5 mm/80 Modèle 1931 8 mm/50 Modèle 1914 13.2 mm/76 Modèle 1929 25 mm/60 Modèle 1938 25 mm/60 Modèle 1940 37 mm/50 Modèle 1925 37 mm/70 Modèle 1935 57 mm/40 Modèle 1902 75 mm/35 Modèle 1924 75 mm/35 Modèle 1927 90 mm/50 Modèle 1926 100 mm/34 Modèle 1933
Torpedoes	400 mm Modèle 1926V 550 mm Modèle 1919D 550 mm Modèle 1923DT 550 mm Modèle 1924M 550 mm Modèle 1924V