12-inch/50 Vickers (305 mm)

Description

Write an introduction to the article in 2-3 small paragraphs. Briefly tell us about the history of the development and combat using the weaponry and also about its features. Compile a list of air, ground, or naval vehicles that feature this weapon system in the game.

Vehicles equipped with this weapon

• IJN Settsu

General info

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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
12-inch/50 HE	HE	69	69	69	69	69	69
12-inch/50 APC	APC	575	501	399	320	260	187

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%
12-inch/50 HE	HE	915	400.06	0	0.1	37.82	79°	80°	81°
12-inch/50 APC	APC	915	400.06	0.035	17	13.64	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 turn of the 20th century marked an international naval arms race for nations around the world. When the idea of an all-big-gun battleship was published in the magazine Jane's Fighting Ships in 1906, Japan was the first nation to lay down a ship to such specifications, but the finished Satsuma-class battleships were instead built with significant 10-inch gun batteries due to an economic depression after the 1904-1905 Russo-Japanese War. The following Kawachi-class ships, Kawachi and Settsu, were built with similar plans as an all-big-gun battleship, but in 1908, the Imperial Japanese Navy learned of the 12 inch/50 Mark XI guns being built by the Royal Navy and decided to use similar guns on these ships. Designed jointly by Vickers and Armstrong, the manufacturing of these guns was handled by their subsidiary Nihon Seiko Si (Japanese Steelworks). Japan was still in a depression at the time of construction so only the fore and aft super-firing turret were equipped with these guns, while the shorter barrelled 12-inch/45 Vickers was mounted amidships. The 12-inch/50-calibre Vickers was only used on the Kawachi class as the following Fuso class were armed with 36 cm/45 Type 41 to counter the 14-inch guns of the New York class. The Kawachi was destroyed in a magazine detonation in 1918 in Tokoyama Bay, Yamaguchi Prefecture while the Settsu would be scrapped following the 1922 Washington Naval Treaty due to the limitations on battleship tonnage. The 12-inch/50-calibre (by this point re-designated the 30 cm/50 41st Year Type) guns were reassigned to the Imperial Japanese Army and mounted as coastal defense guns with hydraulic rammers at Nagasaki and Tsushima Island.

Media

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See also

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• reference to the article about the variant of the cannon/machine gun;
• references to approximate analogues by other nations and research trees.

External links

• [NavWeaps] Japan 12"/50 (30.5 cm) Armstrong/Vickers

Japan naval cannons
20 mm	JM61 · Type 98
25 mm	25 mm/60 Type 96
37 mm	Type 4 · Type 11 pattern 1922
40 mm	40 mm/62 Vickers
57 mm	Type 97
75 mm	Type 88 AA
76 mm	3-inch/40 Type 41 · 8 cm/40 3rd Year Type · 8 cm/60 Type 98
100 mm	100/65 mm Type 98 mod A
120 mm	120 mm/45 3rd Year Type · 120 mm/45 10th year type
127 mm	5 inch/40 Type 89 · 127 mm/50 3rd Year Type
140 mm	140 mm/50 3rd Year Type
152 mm	6-inch/45 Type 41 · 15 cm/50 Type 41
155 mm	155 mm/60 3rd Year Type
200 mm	20 cm 3rd year type No.1
203 mm	20 cm/45 Type 41 · 20 cm/50 3rd year type No.2
356 mm	36 cm/45 Type 41
410 mm	410 mm/45 Type 3
	Foreign:
20 mm	20 mm/70 Oerlikon Mk.II (USA/Britain)
40 mm	Bofors L/60 Mark 1 (USA) · Bofors L/60 Mark 2 (USA) · Bofors L/60 Mark 3 (USA)
47 mm	3 pdr QF Hotchkiss (Britain)
76 mm	3-inch Mark 10 (USA) · 3 inch Mk.33 (USA) · 3-inch Mk.34 (USA)
120 mm	4,7-inch/40 Armstrong (Britain)
127 mm	5 inch/38 Mk.12 (USA)
305 mm	12-inch/45 Vickers (Britain) · 12-inch/50 Vickers (Britain)