Difference between revisions of "1.1 inch/75 Mk.1 (28 mm)"

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[[File:1.1 inch 75 Mk.1.jpg|thumb|x250px|The '''{{PAGENAME}}''' on [[USS Atlanta]]]]
 
== Description ==
 
== Description ==
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''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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<!--''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 '''1.1 inch/75 Mk.1''', nicknamed the "'''Chicago Piano'''", is an American anti-aircraft gun mounted on early destroyers and cruisers. Meant to replace the M2 Browning, it proved unpopular with its crews due to its unreliability. It was replaced by the 20 mm Oerlikon and 40 mm Bofors wherever possible, with the former having similar performance but requiring far less space, and the latter using the same amount of space but dramatically more effective.
  
 
=== 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|us_cruiser_omaha_class_raleigh}}
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{{Navigation-Start|Vehicles equipped with this weapon}}
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* {{Specs-Link|us_cruiser_omaha_class_trenton}}
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* {{Specs-Link|us_destroyer_somers}}
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{{Navigation-First-Line|'''Destroyers'''}}{{Specs-Link|us_destroyer_porter_1941}}{{-}}{{Specs-Link|us_destroyer_porter_1942}}{{-}}{{Specs-Link|us_destroyer_somers}}
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{{Navigation-Line|'''Light cruisers'''}}{{Specs-Link|us_cruiser_atlanta_class_atlanta}}{{-}}{{Specs-Link|us_cruiser_omaha_class_detroit}}{{-}}{{Specs-Link|us_cruiser_omaha_class_trenton}}
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{{Navigation-Line|'''Heavy cruisers'''}}{{Specs-Link|us_cruiser_northampton_class}}{{-}}{{Specs-Link|us_cruiser_pensacola_class}}{{-}}{{Specs-Link|us_cruiser_portland_class}}
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{{Navigation-Line|'''Battleships'''}}{{Specs-Link|us_battleship_arkansas}}
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{{Navigation-End}}
  
 
== General info ==
 
== General info ==
 
''Tell us about the tactical and technical characteristics of the cannon or machine gun.''
 
''Tell us about the tactical and technical characteristics of the cannon or machine gun.''
  
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=== Available shells ===
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=== Available ammunition ===
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''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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<!-- ''Describe the shells that are available for the weapon 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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{{:{{PAGENAME}}/Ammunition|1.1 inch Mk.1 HE-T}}
  
 
=== Comparison with analogues ===
 
=== Comparison with analogues ===
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''Give a comparative description of cannons/machine guns, that have firepower equal to these type of weapons.''
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''Give a comparative description of cannons/machine guns that have firepower equal to this weapon.''
  
 
== Usage in battles ==
 
== Usage in battles ==
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''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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''Describe the cannon/machine gun in the game - its distinctive features, tactics of usage against notable opponents. Please don't write a "guide" - do not impose a single point of view, but give the reader food for thought.''
  
 
=== Pros and cons ===
 
=== Pros and cons ===
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''Summarize and briefly evaluate the weaponry in terms of its characteristics and combat effectiveness. Mark pros and cons as a list.''
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<!-- ''Summarise and briefly evaluate the weaponry in terms of its characteristics and combat effectiveness. Mark pros and cons as a list.'' -->
  
 
'''Pros:'''
 
'''Pros:'''
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*
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* 4 barrels give a large volume of fire
  
 
'''Cons:'''
 
'''Cons:'''
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*
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* Overheats somewhat quickly
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* Long reload of 15s
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* Only 1 choice of ammo belt
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* Low rate of fire, less than the 40 mm Bofors
  
 
== History ==
 
== 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: <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></nowiki></code>, as well as adding them at the end of the article.''
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''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>.''
  
 
== Media ==
 
== Media ==
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''An excellent addition to the article would be a video guide, as well as screenshots from the game and photos.''
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''Excellent additions to the article would be video guides, screenshots from the game, and photos.''
  
 
== See also ==
 
== See also ==
 
''Links to the articles on the War Thunder Wiki that you think will be useful for the reader, for example:''
 
''Links to the articles on the War Thunder Wiki that you think will be useful for the reader, for example:''
 +
 
* ''reference to the article about the variant of the cannon/machine gun;''
 
* ''reference to the article about the variant of the cannon/machine gun;''
 
* ''references to approximate analogues by other nations and research trees.''
 
* ''references to approximate analogues by other nations and research trees.''
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== External links ==
 
== External links ==
 
''Paste links to sources and external resources, such as:''
 
''Paste links to sources and external resources, such as:''
 +
 
* ''topic on the official game forum;''
 
* ''topic on the official game forum;''
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* ''encyclopedia page on the weapon;''
 
 
* ''other literature.''
 
* ''other literature.''
  

Latest revision as of 19:17, 20 August 2024

The 1.1 inch/75 Mk.1 (28 mm) on USS Atlanta

Description

The 1.1 inch/75 Mk.1, nicknamed the "Chicago Piano", is an American anti-aircraft gun mounted on early destroyers and cruisers. Meant to replace the M2 Browning, it proved unpopular with its crews due to its unreliability. It was replaced by the 20 mm Oerlikon and 40 mm Bofors wherever possible, with the former having similar performance but requiring far less space, and the latter using the same amount of space but dramatically more effective.

Vehicles equipped with this weapon

Vehicles equipped with this weapon
Destroyers  USS Porter · USS Moffett · USS Somers
Light cruisers  USS Atlanta · USS Detroit · USS Trenton
Heavy cruisers  USS Northampton · USS Pensacola · USS Portland
Battleships  USS Arkansas

General info

Tell us about the tactical and technical characteristics of the cannon or machine gun.

Available ammunition

Penetration statistics
Ammunition Type of
warhead 		Penetration @ 0° Angle of Attack (mm)
10 m 100 m 500 m 1,000 m 1,500 m 2,000 m
Mk.1 HE-T HEF-T* 2 2 2 2 2 2
Shell details
Ammunition Type of
warhead 		Velocity
(m/s) 		Projectile
mass (kg) 		Fuse delay
(m) 		Fuse sensitivity
(mm) 		Explosive mass
(TNT equivalent) (g) 		Ricochet
0% 50% 100%
Mk.1 HE-T HEF-T* 823 0.42 0 0.1 14.7 79° 80° 81°

Comparison with analogues

Give a comparative description of cannons/machine guns that have firepower equal to this weapon.

Usage in battles

Describe the cannon/machine gun in the game - its distinctive features, tactics of usage against notable opponents. Please don't write a "guide" - do not impose a single point of view, but give the reader food for thought.

Pros and cons

Pros:

  • 4 barrels give a large volume of fire

Cons:

  • Overheats somewhat quickly
  • Long reload of 15s
  • Only 1 choice of ammo belt
  • Low rate of fire, less than the 40 mm Bofors

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: 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></ref>, as well as adding them at the end of the article with <references />.

Media

Excellent additions to the article would be video guides, screenshots from the game, and photos.

See also

Links to the articles on the War Thunder Wiki that you think will be useful for the reader, for example:

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

External links

Paste links to sources and external resources, such as:

  • topic on the official game forum;
  • other literature.


USA naval cannons
20 mm  20 mm/70 Oerlikon Mk.II · 20 mm/70 Oerlikon Mark V · 20 mm/70 Oerlikon Mark 24
25 mm  25 mm/87 Mk.38
28 mm  1.1 inch/75 Mk.1
37 mm  AN-M4
40 mm  Bofors L/60 Mark 1 · Bofors L/60 Mark 2 · Bofors L/60 Mark 3
76 mm  3 inch/23 Mk.4 · 3-inch/50 Mk.10 · 3-inch/70 Mk.37 · 3-inch Mark 10 · 3 inch Mk.33 · 3-inch Mk.34
102 mm  4 inch/50 Mk.9
127 mm  5 inch/25 Mk.11 · 5 inch/25 Mk.13 AA · 5 inch/38 Mk.12 · 5-inch/50 Mk.5 · 5 inch/51 Mk.7 · 127 mm/54 Mark 18
152 mm  6 inch/47 Mk.16 · 6 inch/47 DP Mk.16 · 6 inch/53 Mk.12 · M81
203 mm  8 inch/55 Mark 9 · 8 inch/55 Mark 12 · 8 inch/55 Mark 14 · 8 inch/55 Mark 16
305 mm  12-inch/45 Mk.5 · 12 inch/50 Mk.7 · 12 inch/50 Mk.8
356 mm  14 inch/45 Mk.8 · 14 inch/45 Mk.12 · 14 inch/50 Mk.11

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