QF STAAG Mark II (40 mm) - Revision history

U22067555: Added HMS Diamond

2024-03-15T08:14:37Z

Added HMS Diamond

U123137325: /* Vehicles equipped with this weapon */

2023-06-24T22:51:02Z

‎Vehicles equipped with this weapon

U44629479: Edits

2023-05-03T14:15:09Z

Edits

U12017485: Corrected image to be in line with the other weapon pages

2023-05-03T13:29:40Z

Corrected image to be in line with the other weapon pages

U44629479: /* Vehicles equipped with this weapon */ Edits

2023-03-13T22:28:54Z

‎Vehicles equipped with this weapon: Edits

U17577377: /* Vehicles equipped with this weapon */

2023-03-13T22:27:24Z

‎Vehicles equipped with this weapon

U44629479: Edits

2023-03-07T17:16:26Z

Edits

U44629479: /* See also */ Edits

2023-01-31T15:33:38Z

‎See also: Edits

U38088265: /* Vehicles equipped with this weapon */

2022-11-12T20:18:23Z

‎Vehicles equipped with this weapon

U44629479: Undo revision 132693 by U4045774 (talk)

2022-06-28T06:30:58Z

Undo revision 132693 by U4045774 (talk)

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 * {{Specs-Link|uk_frigate_whitby_blackpool}}
 * {{Specs-Link|uk_destroyer_battle_cadiz}}
 * {{Specs-Link|uk_destroyer_daring_class_diana}}
 * {{Specs-Link|uk_frigate_leopard}}
 * {{Specs-Link|uk_frigate_whitby}}
 == General info ==

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 * {{Specs-Link|uk_frigate_leopard}}
 * {{Specs-Link|uk_frigate_whitby}}
 == General info ==

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-[[File:40mm QF STAAG Mark II.png|thumb|x250px|The {{PAGENAME}} on the Battle (D14).]]
+[[File:40mm QF STAAG Mark II.png|thumb|x250px|The 40 mm QF STAAG Mark II on HMS Armada.]]
 == 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.''-->

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 == 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.''-->
 The '''40 mm QF STAAG Mark II''' is a naval anti-aircraft twin mounting that consists of two British-produced, water-cooled Bofors 40 mm L/60 gun with onboard radar and fire control systems (radar functionality is not present in-game). The Bofors 40 mm L/60, also known as the "Bofors L/60", the "Bofors gun", or simply "the Bofors", was a highly successful Swedish anti-aircraft gun design of the interwar period and was widely used during the Second World War by both sides and in all theatres and remained in service long after the end of WWII.

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 * {{Specs-Link|uk_destroyer_battle_tobruk}}
 * {{Specs-Link|uk_destroyer_battle_2series}}
 * {{Specs-Link|uk_destroyer_battle_cadiz}}
 * {{Specs-Link|uk_destroyer_daring_class_diana}}
 * {{Specs-Link|uk_frigate_whitby}}
 == General info ==

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 The only naval Bofors 40 mm L/70 currently present in the game is the [[MEL58 (40 mm)|MEL58]], which is, by and large, superior with a much higher rate of fire of 240 rounds per minute. The only other difference is the HE round: the MEL58's HE round has less explosive mass (0.03625 kg TNT eq.), but it has a higher muzzle velocity (1030 m/s).
-It should be noted that [[4 cm Bofors Flak 28 (40 mm)|4 cm Bofors Flak 28]] is the only naval Bofors gun in-game with access to a pure HE ammunition choice, at the cost of not having any AP options. Every other naval Bofors gun has ammunition choices comprised of a mix of HE and AP, in ratios of 1:1, 3:1, or 1:3.
+The [[Bofors Flak 28 (40 mm)|40 mm Bofors Flak 28]] is the only naval Bofors gun in-game with access to a pure HE ammunition choice, at the cost of not having any AP options. Every other naval Bofors gun has ammunition choices comprised of a mix of HE and AP, in ratios of 1:1, 3:1, or 1:3.
 '''Compared to other common guns of similar calibre:'''

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 * ''references to approximate analogues by other nations and research trees.''-->
-Other variants of the Bofors 40 mm gun within the game include:
+* [[Bofors (40 mm) (Family)]]
 == External links ==

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 == 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.''-->
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 * {{Specs-Link|uk_destroyer_battle_2series}}
 * {{Specs-Link|uk_destroyer_battle_cadiz}}
 * {{Specs-Link|uk_frigate_whitby_blackpool}}
 * {{Specs-Link|uk_frigate_leopard}}
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 == History ==
 <!--''Examine the history of the creation and combat usage of the weapon in more detail than in the introduction. If the historical reference turns out to be too long, take it to a separate article, taking a link to the article about the weapon and adding a block "/History" (example: <nowiki>https://wiki.warthunder.com/(Weapon-name)/History</nowiki>) and add a link to it here using the <code>main</code> template. Be sure to reference text and sources by using <code><nowiki><ref></ref></nowiki></code>, as well as adding them at the end of the article with <code><nowiki><references /></nowiki></code>.''-->
 In 1928, the Swedish Royal Navy contracted the Bofors Company to design a suitable replacement for their Vickers 2-pounder guns anti-aircraft guns (the Vickers "Pom-Poms"). Work on the design began right away and a prototype model was produced by mid-1930. The prototype had a vertical sliding breech block design and was automatic. Upon firing, the recoil of the gun would open the breech and eject the spent casing out its rear whilst an autoloading mechanism would insert the next round into the empty breech, after which the action of the gun sliding back into place would close the breech once again, leaving the gun ready to fire once more.
 While proving the potential of the design, the prototype failed to meet the specified rate of fire requirement of 130 rounds per minute. It wasn't until 1934 that a production model, 40 mm L/60 Model 1934, was ready. In the following years, minor improvements led to the development of 40 mm L/60 Model 1936, which would finally be accepted into Swedish service as 40 mm/60 Model 1936. Despite its name, the barrel length of the 40 mm L/60 Model 1936 was actually 2250 mm (56.25 calibres).
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 The British Army first purchased 100 Bofors guns in 1937 for examination and testing which were found to show satisfactory performance. However, many parts of the gun as originally designed were intended to be fashioned or fitted by hand, limiting the rate of production to a pace that couldn't possibly meet British demand. Thus, Britain acquired a licence to produce the gun domestically. Changes were made to the design to streamline mass production, including the conversion of measurements from metric to imperial. These changes not only vastly improved production efficiency, but they also lowered production costs.
 The Stabilised Tachometric Anti-Aircraft Gun (STAAG) Mark II mounting was a post-war twin mounting with two mirrored OQF 40 mm Mark X guns mounted side-by-side. Weighing in at a total of 17.8 tonnes, the STAAG Mark II was one of the most complex anti-aircraft mounts of its time. The mount had its own stabilization systems and was triaxially stabilized, but not in the traditional sense; the mount itself was on stabilized on two axes, while the third came from lateral deflection of the guns themselves. Mounted to the rear and left of the guns, the STAAG Mark II carried the Type 262 radar, as well as a separate tracking radar and rangefinder, that provided onboard computers with target information, allowing the system to predict the target's movements. In this aspect, the STAAG Mark II was considered very accurate. The Mark X guns of the STAAG Mark II were water-cooled, and the STAAG Mark II had its own pumps to circulate water through the guns' water jackets. Additionally, the STAAG Mark II was hydraulically powered, able to elevate and train the guns at a rate of 35°/s both ways, and had an onboard backup generator in case power was cut to the system.
 Sitting behind the gunshield and to the left of the guns was the gunner. Behind him was radar cabinet, just behind which sat the radar operator. Standing on a platform behind both of the guns was the commander, who had his own displays and controls. SAP, AP, and HE rounds were produced for the British Bofors guns, each weighing 0.894 kg (1.97 lbs.). Both SAP and AP were painted black with white tips, with AP being distinguished by a white ring painted on the body. HE, painted buff, had 0.068 kg (0.15 lbs.) of TNT and self-destroyed after travelling for approximately 3,200 m (3,500 yds). Rounds with tracer were indicated by an additional red ring. To either side of the commander at the rear of the firing platform were two ammunition hoists. Crewmen on the deck loaded ammunition into the hoists. Ammunition from the hoists was loaded by the crew on the firing platform through the top of the guns into ammunition "hoppers", from which the automatic loaders pulled the ammunition from. Spent cartridges were ejected out of the rear of the gun, down chutes redirecting them under the guns towards the front where they can be ejected safely away from the crew.
 The STAAG Mark II replaced many of the older, yet similar Mark IV "Hazemeyer" mountings. Despite its technological advantages, the STAAG Mark II suffered from many of its own problems. The first of these problems was its weight of 17.8 tonnes, which was significantly heavier than mounts of its type, especially for a twin mount. Another problem was the complexity of the STAAG Mark II, which needlessly complicated maintenance and lowered reliability without showing enough improvements over other mounting designs to warrant it. A third issue was that the radar and other electrical equipment were carried directly on the mount itself, which put them under stress from the STAAG Mark II's movements and the vibrations from firing the guns. For these reasons, the STAAG Mark II did not remain in service for very long, soon replaced by the much simpler and more reliable Mark V twin mount.

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 [[File:40mm QF STAAG Mark II.png|350px|thumb|left|The {{PAGENAME}} on the Battle (D14).]]
 {{Break}}
-The '''40 mm QF STAAG Mark II''' is a naval anti-aircraft twin mounting that consists of two British-produced, air-cooled Bofors 40 mm L/60 gun with onboard radar and fire control systems (radar functionality is not present in-game). The Bofors 40 mm L/60, also known as the "Bofors L/60", the "Bofors gun", or simply "the Bofors", was a highly successful Swedish anti-aircraft gun design of the interwar period and was widely used during the Second World War by both sides and in all theatres and remained in service long after the end of WWII.
+The '''40 mm QF STAAG Mark II''' is a naval anti-aircraft twin mounting that consists of two British-produced, water-cooled Bofors 40 mm L/60 gun with onboard radar and fire control systems (radar functionality is not present in-game). The Bofors 40 mm L/60, also known as the "Bofors L/60", the "Bofors gun", or simply "the Bofors", was a highly successful Swedish anti-aircraft gun design of the interwar period and was widely used during the Second World War by both sides and in all theatres and remained in service long after the end of WWII.
 === Vehicles equipped with this weapon ===
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 '''Pros:'''
 * Large explosive mass in HE round
 * High-penetration AP round
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 '''Cons:'''
 * Can jam if continuously fired for too long