305 mm/46 Armstrong model 1909 (305 mm)

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Description

The 305 mm/46 Armstrong model 1909 is a naval gun that was developed by the British company Armstrong Whitworth in the early 1900s.

Vehicles equipped with this weapon

General info

The gun fires 305 mm rounds at a maximum range of over 24 km and can fire up to 2 rounds per minute.

Available ammunition

Penetration statistics
Ammunition Type of
warhead 		Penetration @ 0° Angle of Attack (mm)
1,000 m 2,500 m 5,000 m 7,500 m 10,000 m 15,000 m
305 mm SAP SAP 418 375 314 264 224 172
305 mm APCBC APCBC 673 611 521 447 387 303
Shell details
Ammunition Type of
warhead 		Velocity
(m/s) 		Projectile
mass (kg) 		Fuse delay
(s) 		Fuse sensitivity
(mm) 		Explosive mass
(TNT equivalent) (kg) 		Ricochet
0% 50% 100%
305 mm SAP SAP 861 401.2 0.03 17 31 47° 60° 65°
305 mm APCBC APCBC 861 452.37 0.035 17 5.66 48° 63° 71°

Comparison with analogues

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Usage in battles

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Pros and cons

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Pros:

Cons:

History

The Regia Marina (Royal Italian Navy) was ahead of the curve to an extent when it came to warship design in the early 1900s. The idea of an all-big-gun-battleship that was codified with the launch of HMS Dreadnought as the new standard for battleship design was first proposed by Italian officer Vittorio Cuniberti in 1903, though the Regia Marina were hesitant to adopt this new design until 1909 when they laid down their dreadnought RN Dante Alighieri. Like the Royal Navy, the Italians decided to use 12-inch (305 mm) guns. The 305 mm/46 Armstrong model 1909 was one of the two 12-inch guns used by the Regia Marina along with the 305 mm/46 Vickers model 1909. While they were used by the Regia Marina interchangeably on their dreadnoughts, the two designs were not compatible. The Armstrong Elswick Pattern "T" was first purchased for Dante Alighieri before licensed production began in Pozzuoli, Naples, the site of Armstrong's Italian subsidiary. These guns were used on the Guilio Cesare and the Duilio. The Armstrong model was a wire-wound design with an inner A tube, a two-part air tube with screwed collar, B tube, half-length wire, jacket, breech ring, and a Welin breech block with hydraulic mounts and weighed 68.2 tons.

The Dante Alighieri never fired her guns in anger. The only combat operation was on October 2nd, 1917 where she was assigned to attack any potential Austro-Hungarian ships that attempted to leave Cattaro (now Kotor, Montenegro) to attack allied ships bombarding Durazzo, though no ships left port. The Giulio Cesare, like the Dante Alighieri, sat out most of World War I and during a modernization program in 1933 some of the guns were bored out to 320 mm (12.6 inches). The few guns that were not modernized were repurposed as coastal defense guns that served in World War II. The Duilio like the other ships using this gun did not see much action in World War I, but did see service in the Black Sea during the Russian Civil War assisting the White Fleet, though its action in World War II was limited and its guns were bored out later too.

Media

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See also

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  • references to approximate analogues by other nations and research trees.

External links


Italy naval cannons
20 mm  20 mm/65 Breda · 20 mm/70 Oerlikon 3S · 20 mm/70 Scotti-Isotta Fraschini mod.1939
37 mm  37 mm/54 Breda Mod.32 · 37 mm/54 Breda Mod.38 · 37 mm/54 Breda Mod.39
40 mm  40 mm/39 Vickers-Terni mod.1915/1917 · 40 mm/39 Vickers-Terni mod.1915/1917, Modif.1930 · 40 mm/70 Breda-Bofors type 107
65 mm  65 mm/64 Ansaldo-Terni Mod.1939
76 mm  76 mm/40 Armstrong mod.1897/1910 · 76 mm/40 Armstrong mod.1897/1912 · 76 mm/40 Ansaldo mod.1917 · 76 mm/45 Schneider mod.1911 · 76 mm/50 Vickers mod.1909 · 76 mm/62 OTO-Melara Compact · 76-mm/62 SMP 3
90 mm  90 mm/50 Ansaldo model 1939
100 mm  100 mm/47 O.T.O. Mod. 1928 · 100 mm/47 O.T.O. Mod. 1937
120 mm  120 mm/45 Canet-Schneider-Armstrong mod.1918-19 · 120 mm/50 Armstrong model 1909 · 120 mm/45 O.T.O. Mod. 1926 · 120 mm/50 Ansaldo mod.1926 · 120 mm/50 O.T.O. Mod.1936
135 mm  135 mm/45 O.T.O. Mod. 1937
152 mm  152 mm/45 Schneider mod.1911 · 152/53 mm Ansaldo mod.1926 · 152/53 mm O.T.O. Mod.1929
203 mm  203 mm/50 Ansaldo mod.1924 · 203 mm/53 Ansaldo mod.1927
305 mm  305 mm/46 Armstrong model 1909 · 305 mm/46 Vickers model 1909
320 mm  320 mm/44 OTO model 1934 · 320 mm/44 Ansaldo model 1936
  Foreign:
20 mm  2 cm/65 Flakvierling 38 (Germany)
40 mm  Bofors L/60 Mark 1 (USA) · Bofors L/60 Mark 3 (USA)
76 mm  76 mm/50 Mk.33 (USA)
127 mm  127 mm/38 Mk.12 (USA)

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