Difference between pages "File:Ha-Go first prototype under public domain .jpg" and "M1A1"

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#REDIRECT [[File:Ha-Go light tank - first prototype.jpg]]
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{{Specs-Card|code=us_m1a1_abrams}}
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{{About
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|about = medium tank '''{{PAGENAME}}'''
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|usage = other uses
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|link = M1 (Disambiguation)
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}}
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== Description ==
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<!-- ''In the description, the first part should be about the history of the creation and combat usage of the vehicle, as well as its key features. In the second part, tell the reader about the ground vehicle in the game. Insert a screenshot of the vehicle, so that if the novice player does not remember the vehicle by name, he will immediately understand what kind of vehicle the article is talking about.'' -->
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[[File:GarageImage_{{PAGENAME}}.jpg|420px|thumb|left]]
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{{break}}
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The '''{{Specs|name}}''' (shortened to '''{{Specs|pseudonym}}''') is a rank {{Specs|rank}} American medium tank {{Battle-rating}}. It was introduced in [[Update 1.87 "Locked On"]].
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== General info ==
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=== Survivability and armour ===
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<!--
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''Describe armour protection. Note the most well protected and key weak areas. Appreciate the layout of modules as well as the number and location of crew members. Is the level of armour protection sufficient, is the placement of modules helpful for survival in combat?''
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''If necessary use a visual template to indicate the most secure and weak zones of the armour.''-->
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The M1A1 is essentially an [[IPM1]] armed with a 120 mm M256 gun, meaning the armour is almost identical to its tech-tree predecessor. The tank features composite armour in gun mantlet, turret cheeks, sides and lower front plate, with composite side skirts affording some protection along the frontal half of the vehicle's hull. The M1A1 retains the Abrams series' exceptional protection against chemical energy projectiles, with the turret cheeks affording some 1,200 mm RHAe against shaped charges and the hull providing around 600 mm. However, the kinetic energy protection of the tank is quite lacklustre compared to its top tier compatriots, especially against the best rounds fielded by other nations' main battle tanks; all of which can easily penetrate the Abrams frontally in practically any location. This makes the tank quite vulnerable to enemy fire. However, the M1A1 also retains the excellent survivability of the Abrams series, with a spread out crew, separate ammunition compartment and shielding for fuel tanks and the engine compartment that make the tank unlikely to die in a single shot.
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=== Mobility ===
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<!--''Write about the mobility of the ground vehicle. Estimate the specific power and manoeuvrability, as well as the maximum speed forward and backwards.''-->
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The M1A1 features the same 1,500 horsepower AGT-1500 gas turbine equipped on the other Abrams tank, though the tank has gotten several tons heavier. When stock, the vehicle accelerates quite sluggishly and features a horrendously slow hull traverse. Fully upgraded however, the M1A1 is quite nimble with decent power to weight ratio and traverse capability. At 68 km/h of top speed and 40 km/h in reverse, the tank is comparable to its counterparts.
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== Armaments ==
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=== Main armament ===
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<!-- ''Give the reader information about the characteristics of the main gun. Assess its effectiveness in a battle based on the reloading speed, ballistics and the power of shells. Do not forget about the flexibility of the fire, that is how quickly the cannon can be aimed at the target, open fire on it and aim at another enemy. Add a link to the main article on the gun: <code><nowiki>{{main|Name of the weapon}}</nowiki></code>. Describe in general terms the ammunition available for the main gun. Give advice on how to use them and how to fill the ammunition storage.''-->
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{{main|M256 (120 mm)}}
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{| class="wikitable" style="text-align:center"
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|-
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! colspan="6" | [[M256 (120 mm)|120 mm M256]]
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|-
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! colspan="3" rowspan="1" style="width:5em" |Capacity
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! rowspan="1" | Vertical <br> guidance
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! rowspan="1" | Horizontal <br> guidance
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! rowspan="1" | Stabilizer
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|-
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| colspan="3" | 40 || -9°/+20° || ±180° || Two-plane
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|-
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! colspan="6" | Turret rotation speed (°/s)
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|-
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! style="width:4em" |Mode
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! style="width:4em" |Stock
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! style="width:4em" |Upgraded
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! style="width:4em" |Prior + Full crew
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! style="width:4em" |Prior + Expert qualif.
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! style="width:4em" |Prior + Ace qualif.
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|-
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| ''Arcade'' || 38.08 || 52.71 || 64.00 || __.__ || 75.29
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|-
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| ''Realistic'' || 23.8 || 28.0 || 34.0 || 37.6 || 40.0
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|-
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! colspan="4" | Reloading rate (seconds)
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|-
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! colspan="1" style="width:4em" |Stock
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! colspan="1" style="width:4em" |Prior + Full crew
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! colspan="1" style="width:4em" |Prior + Expert qualif.
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! colspan="1" style="width:4em" |Prior + Ace qualif.
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|-
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| 7.80 || 6.9 || 6.36 || 6
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|-
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|}
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===== Ammunition =====
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{| class="wikitable sortable" style="text-align:center" width="100%"
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! colspan="8" | Penetration statistics
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|-
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! rowspan="2" data-sort-type="text" | Ammunition
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! rowspan="2" class="unsortable" | Type of <br /> warhead
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! colspan="6" | '''Penetration''' '''''in mm''''' '''@ 0° Angle of Attack'''
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|-
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! 10m
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! 100m
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! 500m
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! 1000m
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! 1500m
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! 2000m
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|-
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| M830 || HEATFS || 650 || 650 || 650 || 650 || 650 || 650
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|-
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| M829 || APFSDS || 493 || 492 || 484 || 476 || 467 || 458
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|-
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|}
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{| class="wikitable sortable" style="text-align:center" width="100%"
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! colspan="11" | Shell details
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|-
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! rowspan="2" data-sort-type="text" | Ammunition
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! rowspan="2" class="unsortable" | Type of <br /> warhead
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! rowspan="2" |Velocity <br /> in m/s
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! rowspan="2" |Projectile<br />Mass in kg
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! rowspan="2" | ''Fuse delay''
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''in m:''
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! rowspan="2" | ''Fuse sensitivity''
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''in mm:''
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! rowspan="2" | ''Explosive Mass in g<br /> (TNT equivalent):''
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! rowspan="2" | ''Normalization At 30° <br> from horizontal:''
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! colspan="3" | ''Ricochet:''
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|-
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! 0%
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! 50%
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! 100%
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|-
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| M830 || HEATFS || 1,140 || 13.5 || 0.0 || 0.1 || 1,640 || +0° || 65° || 72° || 75°
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|-
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| M829 || APFSDS || 1,679 || 4.3 || N/A || N/A || N/A || +1.5° || 78° || 80° || 81°
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|-
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|}
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===== [[Ammo racks|Ammo racks]] =====
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{| class="wikitable sortable" style="text-align:center"
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|-
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! class="wikitable unsortable" |Full<br /> ammo
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! class="wikitable unsortable" |1st<br />  rack empty
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! class="wikitable unsortable" |2nd<br />  rack empty
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! class="wikitable unsortable" |Visual<br /> discrepancy
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|-
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|| '''40''' || XX&nbsp;''(+XX)'' || XX&nbsp;''(+XX)'' || style="text-align:left" | No
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|-
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|}
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=== Machine guns ===
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<!--''Offensive and anti-aircraft machine guns not only allow you to fight some aircraft, but also are effective against lightly armoured vehicles. Evaluate machine guns and give recommendations on its use.''-->
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{{main|M2HB (12.7 mm)|M240 (7.62 mm)}}
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{| class="wikitable" style="text-align:center"
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|-
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! colspan="7" | [[M2HB (12.7 mm)|12.7 mm M2HB]]
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|-
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! colspan="7" | ''Pintle mount (Commander)''
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|-
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! colspan="4" rowspan="1" style="width:5em" |Capacity (Belt capacity)
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! rowspan="1" | Fire rate <br> (shots/minute)
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! rowspan="1" | Vertical <br> guidance
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! rowspan="1" | Horizontal <br> guidance
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|-
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| colspan="4" | 1,000 (200) || 577 || -9°/+65° || ±180°
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|-
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|}
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{| class="wikitable" style="text-align:center"
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|-
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! colspan="7" | [[M240 (7.62 mm)|7.62 mm M240]]
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|-
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! colspan="7" | ''Coaxial mount''
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|-
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! colspan="4" rowspan="1" style="width:5em" |Capacity (Belt capacity)
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! rowspan="1" | Fire rate <br> (shots/minute)
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! rowspan="1" | Vertical <br> guidance
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! rowspan="1" | Horizontal <br> guidance
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|-
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| colspan="4" | 10,000 (200) || 750 || N/A || N/A
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|-
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! colspan="7" | ''Pintle mount (Loader)''
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|-
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! colspan="4" rowspan="1" style="width:5em" |Capacity (Belt capacity)
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! rowspan="1" | Fire rate <br> (shots/minute)
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! rowspan="1" | Vertical <br> guidance
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! rowspan="1" | Horizontal <br> guidance
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|-
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| colspan="4" | 1,400 (200) || 750 || -9°/+65° || -77°/+135°
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|-
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|}
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== Usage in battles ==
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''Describe the tactics of playing in the vehicle, the features of using vehicles in the team and advice on tactics. Refrain from creating a "guide" - do not impose a single point of view but instead give the reader food for thought. Describe the most dangerous enemies and give recommendations on fighting them. If necessary, note the specifics of the game in different modes (AB, RB, SB).''
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=== Pros and cons ===
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<!-- ''Summarize and briefly evaluate the vehicle in terms of its characteristics and combat effectiveness. Mark its pros and cons in a bulleted list. Try not to use more than 6 points for each of the characteristics. Avoid using categorical definitions such as "bad", "good" and the like - they can be substituted with softer forms such as "inadequate" and "effective".'' -->
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'''Pros:'''
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* 120 mm gun with access to good rounds, including one of the best APFSDS rounds in the game
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* Turret exceptionally well protected against chemical rounds
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* Decent mobility when upgraded
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* Ammunition in the turret, when detonated, generally will not spread to the crew compartment
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* The fuel tanks and engine compartment are separated from the crew compartment by steel plates, increasing the time it takes for a fire to destroy the vehicle
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* Reload speed of the 120 mm is decent; 6 seconds with an aced crew level
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'''Cons:'''
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* Stock vehicle is sluggish
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* Stock rounds are quite inadequate against many of the main battle tanks the vehicle faces
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* Ammunition variety is limited to two choices, a HEAT-FS and APFSDS round
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* Reload time slower than 105 mm armed predecessors
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* Hull and turret armour less effective against kinetic rounds, plus are lacking in protection against the armaments of current Rank VII vehicles
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== History ==
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<!--''Describe the history of the creation and combat usage of the ground vehicle in more detail than in the introduction. If the historical reference turns out to be too big, take it to a separate article, taking a link to the article about the vehicle and adding a block "/ History" (example: <nowiki>https://wiki.warthunder.com/(Vehicle-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. This section may also include the vehicle's devblog entry (if applicable) and the ingame encyclopedia description (under <code><nowiki>=== Encyclopedia Info ===</nowiki></code>, also if applicable).''-->
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Almost as soon as the first production M1 Abrams MBTs began rolling off the assembly line, did American engineers begin working on an up-gunned version of the Abrams. They succeeded in this endeavour in 1981, after a prototype Abrams, designated M1E1, was successfully fitted with a 120mm Rheinmetall smoothbore cannon.
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Showing promising performance, work on the vehicle continued. At the same time, an upgraded version of the original Abrams, the IPM1, which featured improved protection and a larger turret was briefly produced between 1984 - 1986. The resulting M1A1 Abrams inherited the upgrades from the IPM1 and combined them with the M256 120 mm smoothbore cannon, a licence-built version of the German original.
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The M1A1 was adopted for service in 1984 and was produced alongside the IPM1 for a short while since 1985 until the older modification was phased out of production.
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The M1A1 saw its first use during the U.S. deployment in the Gulf War in 1991. Faced against arguably inferior Soviet-era tanks, the M1A1 had successfully proven its worth in tank-on-tank engagements but exposed new problems concerning its performance and vulnerability in urban environments. This led to further upgrades for the vehicle being developed later on.
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Production of the M1A1 seized in 1992, with over 5,800 units being produced, including Egyptian and Australian export models. The original M1A1 chassis still serves today, albeit as upgraded variants which have undergone several modernization efforts.
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''- From [https://warthunder.com/en/news/6087-development-m1a1-abrams-leaping-forward-en Devblog]''
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== Media ==
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''Excellent additions to the article would be video guides, screenshots from the game, and photos.''
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== See also ==
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''Links to the articles on the War Thunder Wiki that you think will be useful for the reader, for example:''
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* ''reference to the series of the vehicles;''
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* ''links to approximate analogues of other nations and research trees.''
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== External links ==
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<!--''Paste links to sources and external resources, such as:''
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* ''topic on the official game forum;''
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* ''encyclopedia page on the tank;''
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* ''other literature.''-->
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* [https://warthunder.com/en/news/6087-development-m1a1-abrams-leaping-forward-en [Devblog<nowiki>]</nowiki> M1A1 Abrams: Leaping Forward]
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{{USA medium tanks}}
Retrieved from "https://wiki.warthunder.com/File:Ha-Go_first_prototype_under_public_domain_.jpg"