Difference between revisions of "Browning-Colt Mk12 Mod 3 (20 mm)"

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(Significant most page sections. Added links to documents used in bug reports containing technical characteristics.)
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== Description ==
 
== 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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The Colt-Browning Mk 12 Mod 3 is an advanced derivative of the [[AN/M3 (20 mm)]] cannon, and became the standard cannon found on US Navy aircraft from the mid 1950s. Compared to the AN/M3 it replaced, the Mk 12 boasted a faster rate of fire and a higher muzzle velocity, courtesy of the new, electrically-primed cartridges designed specifically for the Mk 12.
  
 
=== Vehicles equipped with this weapon ===
 
=== Vehicles equipped with this weapon ===
 
<!-- ''List out vehicles that are equipped with the weapon.'' -->
 
<!-- ''List out vehicles that are equipped with the weapon.'' -->
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* {{Specs-Link|fj_4b}}
 
* {{Specs-Link|fj_4b}}
 
* {{Specs-Link|fj_4b_agm_12b}}
 
* {{Specs-Link|fj_4b_agm_12b}}
  
 
== General info ==
 
== General info ==
''Tell us about the tactical and technical characteristics of the cannon or machine gun.''
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Rate of Fire: 1000 rounds/min
 +
 
 +
Individual Gun Burst Mass: 1.83 kg/sec
 +
 
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Muzzle Velocity: 1012 metres/sec
 +
 
 +
Projectile Mass: 110 grams
 +
 
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HE-I Filler Mass: 14 grams
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 +
Tracer Colour: Red
  
 
=== Available shells ===
 
=== Available shells ===
''Describe the shells that are available for the cannon and their features and purpose. If it concerns autocannons or machine guns, write about different ammo belts and what is inside (which types of shells).''
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The Mk 12 cannon fires 20x110mm USN ammunition, which was developed from the 20x110mm Hispano-Suiza ammunition used on the AN/M2 and AN/M3 cannons.
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 +
The following belts can be found on the Mk 12 Mod 3 cannon:
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 +
* Default belts - These are comprised of Mk 106 HE-I and Mk 108 AP-T rounds ordered HE-I/HE-I/AP-T, and are the stock belts that come with the cannon.
 +
* Universal belts - These general-purpose belts are made up of the same HE-I and AP-T rounds as the default belts, only in a repeating HE-I/AP-T order.
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* Ground Target belts -  Intended to be used against armoured ground targets, these boast a belt made up almost entirely of armour piercing ammunition. It features Mk 106 HE-I, Mk 107 AP-I, and Mk 108 AP-T rounds arranged in AP-T/AP-T/HE-I/AP-I order.
 +
* Air Target belts - These belts are arranged in much the same way as the Universal belts. However, every fourth round is now a Mk 107 AP-I round, leaving the belts ordered as HE-I/AP-T/HE-I/AP-I.
 +
* Stealth belts - These belts contain the most HE-I rounds of any available for the Mk 12, with Mk 106 HE-I and Mk 107 AP-I rounds in HE-I/HE-I/HE-I/AP-I order.
  
 
=== Comparison with analogues ===
 
=== Comparison with analogues ===
''Give a comparative description of cannons/machine guns, that have firepower equal to these type of weapons.''
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[[AN/M3 (20 mm)|AN/M3]] - The predecessor to the Mk 12, and inferior in almost every way. It has a lower rate of fire, lower burst mass, and lower muzzle velocity than the Mk 12 Mod 3.
 +
 
 +
[[M24A1 (20 mm)|M24A1]] - Derived from the AN/M3, this cannon uses electrically primed cartridges instead of the percussivelly primed cartridges on all other Hispano variants. Much like the AN/M3, its inferior in every way to the Mk 12 Mod 3.
 +
 
 +
[[Hispano Mk.V (20 mm)|Hispano Mk.V]] - The forerunner to the AN/M3, and by extension the Mk 12. As with the two above, it has a lower muzzle velocity, lower rate of fire, and lower burst mass than the Mk 12.
 +
 
 +
All three of the above weapons fire 20x110mm Hispano ammunition, which has a higher projectile mass than the 20x110mm USN used by the Mk 12, so each individual shell impact will do more damage.
 +
 
 +
[[M39A1 (20 mm)|M39A1]] & [[FMC T-160 (20 mm)|FMC T-160]] - These are the US Air Force equivalent to the Mk 12. They have a higher muzzle velocity, much higher rate of fire, and a higher burst mass. However, they have an individual projectile mass nearly 10% lower than that of the Mk 12, and rely more on the sheer number of rounds hitting the target than the size of the shell itself.
  
 
== Usage in battles ==
 
== Usage in battles ==
''Describe the cannon/machine gun in the game - its distinctive features, tactics of usage against the main opponents. Please don't write a "guide" - do not impose a single point of view, but give the reader food for thought.''
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The Mk 12 is an excellent general-purpose cannon - the high quantity of AP rounds in the ''Ground Targets'' belts are ideally suited to taking out lightly armoured vehicles, and the large amount of HE-I rounds in most other belts are easily capable of destroying any opponent. However, the higher rate-of-fire and higher muzzle velocity than the AN/M3 cannons found on the aircraft before it will require some getting used to, particularly when using these cannons against moving targets. Additionally, short bursts are required with a stock cannon, but are not a requirement once the ''New 20mm Cannons'' modification has been unlocked.
  
 
=== Pros and cons ===
 
=== Pros and cons ===
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'''Pros:'''
 
'''Pros:'''
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 +
* Higher velocity ammunition means less lead is required against manoeuvering targets
 +
* High rate-of-fire
 +
* Can fire nearly 400 rounds before jamming when upgraded
 +
 
*
 
*
  
 
'''Cons:'''
 
'''Cons:'''
 +
 +
* As with other high rate-of-fire cannons, it will quickly deplete it's ammunition stores.
 +
* Limited to fairly short bursts while stock to prevent jamming
 +
* Inaccurate while stock
 +
 
*
 
*
  
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== See also ==
 
== See also ==
''Links to the articles on the War Thunder Wiki that you think will be useful for the reader, for example:''
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[[AN/M3 (20 mm)]]
* ''reference to the article about the variant of the cannon/machine gun;''
+
 
* ''references to approximate analogues by other nations and research trees.''
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[[Hispano Mk.V (20 mm)]]
 +
 
 +
[[M24A1 (20 mm)]]
 +
 
 +
[[FMC T-160 (20 mm)]]
 +
 
 +
[[M39A1 (20 mm)]]
  
 
== External links ==
 
== External links ==
''Paste links to sources and external resources, such as:''
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[[wikipedia:Colt_Mk_12_cannon|Colt Mk 12 cannon (Wikipedia)]]
* ''topic on the official game forum;''
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* ''encyclopedia page on the weapon;''
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[https://drive.google.com/file/d/1Qadku999lrNkKvifuJ4MzeMlKQ8EBf4G/view?usp=sharing NAVWEPS OP 1866 - 20-mm Aircraft Gun Mark 12 Mods 0, 2, and 3; Description, Operation and Maintenance (PDF)]
* ''other literature.''
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 +
The following documents also contain information about the Mk 12 cannon, as well as other types -
 +
 
 +
[https://drive.google.com/file/d/1Sc_aDGyOn3RnR8EsqQkzg6AGAQZAW0Xp/view?usp=sharing MIL-STD-637A - Machine and Automatic Guns and Machinegun Trainers Through 30-mm (PDF)]
 +
 
 +
[http://bulletpicker.com/pdf/OP%202215,%20Navy%20Gun%20Type%20Ammunition%20(1972).pdf NAVORD OP 2215 - Navy Gun Type Ammunition (PDF)]
  
{{USA aircraft cannons}}
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[http://bulletpicker.com/pdf/DST-1160G-514-81-VOL2,%20Small%20Caliber%20ID%20Guide%20(20mm%20to%2040mm).pdf Small-Caliber Ammunition Identification Guide, Volume 2 - 20-mm to 40-mm Cartridges (PDF)]{{USA aircraft cannons}}
  
 
[[Category:Aircraft cannons]]
 
[[Category:Aircraft cannons]]

Revision as of 12:27, 14 June 2019

Description

The Colt-Browning Mk 12 Mod 3 is an advanced derivative of the AN/M3 (20 mm) cannon, and became the standard cannon found on US Navy aircraft from the mid 1950s. Compared to the AN/M3 it replaced, the Mk 12 boasted a faster rate of fire and a higher muzzle velocity, courtesy of the new, electrically-primed cartridges designed specifically for the Mk 12.

Vehicles equipped with this weapon

General info

Rate of Fire: 1000 rounds/min

Individual Gun Burst Mass: 1.83 kg/sec

Muzzle Velocity: 1012 metres/sec

Projectile Mass: 110 grams

HE-I Filler Mass: 14 grams

Tracer Colour: Red

Available shells

The Mk 12 cannon fires 20x110mm USN ammunition, which was developed from the 20x110mm Hispano-Suiza ammunition used on the AN/M2 and AN/M3 cannons.

The following belts can be found on the Mk 12 Mod 3 cannon:

  • Default belts - These are comprised of Mk 106 HE-I and Mk 108 AP-T rounds ordered HE-I/HE-I/AP-T, and are the stock belts that come with the cannon.
  • Universal belts - These general-purpose belts are made up of the same HE-I and AP-T rounds as the default belts, only in a repeating HE-I/AP-T order.
  • Ground Target belts - Intended to be used against armoured ground targets, these boast a belt made up almost entirely of armour piercing ammunition. It features Mk 106 HE-I, Mk 107 AP-I, and Mk 108 AP-T rounds arranged in AP-T/AP-T/HE-I/AP-I order.
  • Air Target belts - These belts are arranged in much the same way as the Universal belts. However, every fourth round is now a Mk 107 AP-I round, leaving the belts ordered as HE-I/AP-T/HE-I/AP-I.
  • Stealth belts - These belts contain the most HE-I rounds of any available for the Mk 12, with Mk 106 HE-I and Mk 107 AP-I rounds in HE-I/HE-I/HE-I/AP-I order.

Comparison with analogues

AN/M3 - The predecessor to the Mk 12, and inferior in almost every way. It has a lower rate of fire, lower burst mass, and lower muzzle velocity than the Mk 12 Mod 3.

M24A1 - Derived from the AN/M3, this cannon uses electrically primed cartridges instead of the percussivelly primed cartridges on all other Hispano variants. Much like the AN/M3, its inferior in every way to the Mk 12 Mod 3.

Hispano Mk.V - The forerunner to the AN/M3, and by extension the Mk 12. As with the two above, it has a lower muzzle velocity, lower rate of fire, and lower burst mass than the Mk 12.

All three of the above weapons fire 20x110mm Hispano ammunition, which has a higher projectile mass than the 20x110mm USN used by the Mk 12, so each individual shell impact will do more damage.

M39A1 & FMC T-160 - These are the US Air Force equivalent to the Mk 12. They have a higher muzzle velocity, much higher rate of fire, and a higher burst mass. However, they have an individual projectile mass nearly 10% lower than that of the Mk 12, and rely more on the sheer number of rounds hitting the target than the size of the shell itself.

Usage in battles

The Mk 12 is an excellent general-purpose cannon - the high quantity of AP rounds in the Ground Targets belts are ideally suited to taking out lightly armoured vehicles, and the large amount of HE-I rounds in most other belts are easily capable of destroying any opponent. However, the higher rate-of-fire and higher muzzle velocity than the AN/M3 cannons found on the aircraft before it will require some getting used to, particularly when using these cannons against moving targets. Additionally, short bursts are required with a stock cannon, but are not a requirement once the New 20mm Cannons modification has been unlocked.

Pros and cons

Summarize and briefly evaluate the weaponry in terms of its characteristics and combat effectiveness. Mark pros and cons as a list.

Pros:

  • Higher velocity ammunition means less lead is required against manoeuvering targets
  • High rate-of-fire
  • Can fire nearly 400 rounds before jamming when upgraded

Cons:

  • As with other high rate-of-fire cannons, it will quickly deplete it's ammunition stores.
  • Limited to fairly short bursts while stock to prevent jamming
  • Inaccurate while stock

History

Examine the history of the creation and combat usage of this weapon. If the historical reference turns out to be too big, take it to a separate article, taking a link to an article about the vehicle and adding a block "/ History" (example: https://wiki.warthunder.com/(weapon-name)/History) and add a link to it here using the main template. Be sure to reference text and sources by using <ref>, as well as adding them at the end of the article.

Media

An excellent addition to the article would be a video guide, as well as screenshots from the game and photos.

See also

AN/M3 (20 mm)

Hispano Mk.V (20 mm)

M24A1 (20 mm)

FMC T-160 (20 mm)

M39A1 (20 mm)

External links

Colt Mk 12 cannon (Wikipedia)

NAVWEPS OP 1866 - 20-mm Aircraft Gun Mark 12 Mods 0, 2, and 3; Description, Operation and Maintenance (PDF)

The following documents also contain information about the Mk 12 cannon, as well as other types -

MIL-STD-637A - Machine and Automatic Guns and Machinegun Trainers Through 30-mm (PDF)

NAVORD OP 2215 - Navy Gun Type Ammunition (PDF)

Small-Caliber Ammunition Identification Guide, Volume 2 - 20-mm to 40-mm Cartridges (PDF)

USA aircraft cannons
20 mm  AN/M2 · AN/M3 · FMC T-160 · Browning-Colt Mk12 Mod 3 · M39A1 · M195 · M197 · T31
30 mm  XM140
37 mm  M4 · M10
40 mm  M129
75 mm  T13E1 · M10
  Foreign:
20 mm  MG 151/20 (Germany) · Hispano Mk.II (Britain) · Type 99 Model 1 (Japan) · Hispano 404 (France)