Difference between revisions of "M247"

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{{Specs-Card|code=us_m247}}
+
{{Specs-Card
 +
|code=us_m247
 +
|images={{Specs-Card-Image|GarageImage_{{PAGENAME}}.jpg}}
 +
}}
  
 
== Description ==
 
== Description ==
 
<!--''In the description, the first part needs to 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 the screenshot of the vehicle. If the novice player does not remember the vehicle by name, they will immediately understand what kind of vehicle it is talking about.''-->
 
<!--''In the description, the first part needs to 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 the screenshot of the vehicle. If the novice player does not remember the vehicle by name, they will immediately understand what kind of vehicle it is talking about.''-->
[[File:GarageImage_{{PAGENAME}}.jpg|420px|thumb|left]]
 
{{Break}}
 
 
The '''{{Specs|name}}''' is a Rank {{Specs|rank}} American self-propelled anti-aircraft gun {{Battle-rating|1}}. It was introduced in [[Update 1.81 "The Valkyries"]].
 
The '''{{Specs|name}}''' is a Rank {{Specs|rank}} American self-propelled anti-aircraft gun {{Battle-rating|1}}. It was introduced in [[Update 1.81 "The Valkyries"]].
  
 
== General info ==
 
== General info ==
 
=== Survivability and armour ===
 
=== Survivability and armour ===
 +
{{Specs-Tank-Armour}}
 
<!--''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?''
 
<!--''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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'''Armour type:'''  
 
'''Armour type:'''  
  
*Cast homogeneous armour (Hull)  
+
*Cast homogeneous armour (hull)  
*Rolled homogeneous armour (Rear (low), Roof, Turret)
+
*Rolled homogeneous armour (hull sides (rear bulge), hull roof, turret)
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 29: Line 31:
  
 
* Suspension wheels and tracks are 20 mm thick.
 
* Suspension wheels and tracks are 20 mm thick.
* Belly armour is 38 mm in the front and 25 mm in the rear.
+
* Belly armour is 38 mm thick in the front half and 25 mm in the rear.
  
 
=== Mobility ===
 
=== Mobility ===
 +
{{Specs-Tank-Mobility}}
 
<!-- ''Write about the mobility of the ground vehicle. Estimate the specific power and manoeuvrability, as well as the maximum speed forwards and backwards.'' -->
 
<!-- ''Write about the mobility of the ground vehicle. Estimate the specific power and manoeuvrability, as well as the maximum speed forwards and backwards.'' -->
  
{{tankMobility|abMinHp= 1065|rbMinHp= 663|<!--AoAweight=(optional) -->}}
+
{{tankMobility|abMinHp= 1,065|rbMinHp= 663}}
  
 
The {{PAGENAME}}'s turret is installed on the hull of an [[M48A1|M48 medium tank]], because of this they have roughly similar mobility. The {{PAGENAME}} is about 3 tons heavier than the M48A1 (49.3 tons vs. 46.4 tons), and has a slightly weaker engine, which translates into a slightly more sluggish machine compared to the M48A1. The M48A1 has a max engine power of 810 hp, while the {{PAGENAME}}'s engine power is 750 hp. For a vehicle this heavy, it has fairly good mobility. When spaded, it can comfortably hit a top speed of 45 km/h on flat terrain, while in cross-country you will have a top speed of around 25 km/h. While going backwards, the top speed is somewhat less impressive: about -9 km/h.
 
The {{PAGENAME}}'s turret is installed on the hull of an [[M48A1|M48 medium tank]], because of this they have roughly similar mobility. The {{PAGENAME}} is about 3 tons heavier than the M48A1 (49.3 tons vs. 46.4 tons), and has a slightly weaker engine, which translates into a slightly more sluggish machine compared to the M48A1. The M48A1 has a max engine power of 810 hp, while the {{PAGENAME}}'s engine power is 750 hp. For a vehicle this heavy, it has fairly good mobility. When spaded, it can comfortably hit a top speed of 45 km/h on flat terrain, while in cross-country you will have a top speed of around 25 km/h. While going backwards, the top speed is somewhat less impressive: about -9 km/h.
 +
 +
=== Modifications and economy ===
 +
{{Specs-Economy}}
  
 
== Armaments ==
 
== Armaments ==
<!--''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.''-->
+
{{Specs-Tank-Armaments}}
{{main|Bofors L/70 (40 mm)}}
+
=== Main armament ===
 +
{{Specs-Tank-Weapon|1}}
 +
<!-- ''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.'' The text within these arrows are not to be deleted -->
 +
{{main|M266 (40 mm)}}
  
{| class="wikitable" style="text-align:center"
+
{| class="wikitable" style="text-align:center" width="100%"
|-
 
! colspan="6" | [[Bofors L/70 (40 mm)|40 mm M266 Automatic Cannon]] (x2)
 
 
|-
 
|-
! colspan="3" rowspan="1" style="width:5em" |Capacity (Belt capacity each)
+
! colspan="6" | [[M266 (40 mm)|40 mm M266 automatic Cannon]] (x2) || colspan="5" | Turret rotation speed (°/s) || colspan="4" | Reloading rate (seconds)
! rowspan="1" | Fire rate <br> (shots/minute)
 
! rowspan="1" | Vertical <br> guidance
 
! rowspan="1" | Horizontal <br> guidance
 
 
|-
 
|-
| colspan="3" | 560 (280) || 300 || -5°/+85° || ±180°
+
! Mode !! Capacity (Belt) !! Fire rate !! Vertical !! Horizontal !! Stabilizer
 +
! Stock !! Upgraded !! Full !! Expert !! Aced
 +
! Stock !! Full !! Expert !! Aced
 
|-
 
|-
! colspan="6" | Turret rotation speed (°/s)
+
! ''Arcade''
 +
| rowspan="2" | 560 (280) || rowspan="2" | 300 || rowspan="2" | -10°/+85° || rowspan="2" | ±180° || rowspan="2" | Two-plane || 79.3 || 109.4 || 111.3 || 112.1 || 113.2 || rowspan="2" | 6.5 || rowspan="2" | 5.8 || rowspan="2" | 5.3 || rowspan="2" | 5.0
 
|-
 
|-
! style="width:4em" |Mode
+
! ''Realistic''
! style="width:4em" |Stock
+
| 53.5 || 63.1 || 69.8 || 73.8 || 76.5
! style="width:4em" |Upgraded
 
! style="width:4em" |Prior + Full crew
 
! style="width:4em" |Prior + Expert qualif.
 
! style="width:4em" |Prior + Ace qualif.
 
|-
 
| ''Arcade'' || 79.3 || 109.4 || 111.3 || 112.1 || 113.2
 
|-
 
| ''Realistic'' || 53.5 || 63.1 || 69.8 || 73.8 || 76.5
 
|-
 
! colspan="4" | Reloading rate (seconds)
 
|-
 
! colspan="1" style="width:4em" |Stock
 
! colspan="1" style="width:4em" |Prior + Full crew
 
! colspan="1" style="width:4em" |Prior + Expert qualif.
 
! colspan="1" style="width:4em" |Prior + Ace qualif.
 
|-
 
| 6.5 || 5.8 || 5.3 || 5
 
 
|-
 
|-
 
|}
 
|}
  
=== Ammunition ===
+
==== Ammunition ====
 +
 
 +
* '''Default:''' {{Annotation|HEFI-T*|High-explosive fragmentation incendiary tracer shell (self-destroying)}}{{-}}{{Annotation|AP-T|Armour-piercing tracer shell}} - Good general ammunition, a hit on an aircraft typically means its destruction while still enough to do damage to armoured ground vehicles, especially if it shoots into the side of an enemy tank (weaker armour). Good to start with until comfortable with other types of ammunition.
 +
 
 +
* '''40 mm AP-T:''' {{Annotation|AP-T|Armour-piercing tracer shell}}{{-}}{{Annotation|AP-T|Armour-piercing tracer shell}}{{-}}{{Annotation|AP-T|Armour-piercing tracer shell}}{{-}}{{Annotation|HEFI-T*|High-explosive fragmentation incendiary tracer shell (self-destroying)}} - Very powerful ammunition which can be used against ground targets with significantly more penetration than other 35-40 mm AP-T projectiles. Will easily destroy any target with side shots even outside the point-blank range and can destroy lighter targets and weak spots from the front even against main battle tanks.
 +
 
 +
* '''M811:''' {{Annotation|HEFI-T*|High-explosive fragmentation incendiary tracer shell (self-destroying)}}{{-}}{{Annotation|HEFI-T*|High-explosive fragmentation incendiary tracer shell (self-destroying)}}{{-}}{{Annotation|HEFI-T*|High-explosive fragmentation incendiary tracer shell (self-destroying)}}{{-}}{{Annotation|AP-T|Armour-piercing tracer shell}} - Unlike the M822 shells these require direct hits on aircraft to do significant damage, but if problems are experienced with M822 detonating too early this belt may be your best choice.
 +
 
 +
* '''M822:''' {{Annotation|HE-VT*|High-explosive variable time fuze shell (self-destroying)}}{{-}}{{Annotation|HE-VT*|High-explosive variable time fuze shell (self-destroying)}}{{-}}{{Annotation|AP-T|Armour-piercing tracer shell}} - Proximity-fused shells that absolutely obliterate aircraft when they make contact, though if they detonate too early, they will do little to no damage. Somewhat unreliable in if they detonate within range of the target, but when they do the target will quickly take considerable damage if not destroyed. The only ammunition for self-propelled anti-aircraft guns that which can cause enough shrapnel damage to bring down planes and helicopters even with near misses. This round should be the go-to anti-air ammunition, although the M811 is a good backup if the M822 is problematic for the gunner.
 +
 
 
{| class="wikitable sortable" style="text-align:center" width="100%"
 
{| class="wikitable sortable" style="text-align:center" width="100%"
 
! colspan="8" | Penetration statistics
 
! colspan="8" | Penetration statistics
 
|-
 
|-
 
! rowspan="2" data-sort-type="text" | Ammunition
 
! rowspan="2" data-sort-type="text" | Ammunition
! rowspan="2" class="unsortable" | Type of <br /> warhead
+
! rowspan="2" | Type of<br>warhead
! colspan="6" | '''Penetration''' '''''in mm''''' '''@ 90°'''
+
! colspan="6" | '''Penetration @ 0° Angle of Attack (mm)'''
 +
|-
 +
! 10 m !! 100 m !! 500 m !! 1,000 m !! 1,500 m !! 2,000 m
 
|-
 
|-
! 10m
+
| Default || HEFI-T*/AP-T || 94 || 90 || 77 || 62 || 51 || 41
! 100m
 
! 500m
 
! 1000m
 
! 1500m
 
! 2000m
 
 
|-
 
|-
| M811 || HEFI-T* || 5 || 5 || 5 || 5 || 5 || 5
+
| 40 mm AP-T || AP-T/HEFI-T* || 94 || 90 || 77 || 62 || 51 || 41
 
|-
 
|-
| M822 || HEFI-T* || 5 || 5 || 5 || 5 || 5 || 5
+
| M811 || HEFI-T*/AP-T || 94 || 90 || 77 || 62 || 51 || 41
 
|-
 
|-
| 40 mm AP-T || AP-T || 93 || 90 || 77 || 62 || 51 || 41  
+
| M822 || HE-VT*/AP-T || 94 || 90 || 77 || 62 || 51 || 41
 
|-  
 
|-  
 
|}
 
|}
{| class="wikitable sortable" style="text-align:center" width="100%"
+
 
! colspan="11" | Shell details
+
==== [[Ammo racks]] ====
 +
[[File:Ammoracks_{{PAGENAME}}.png|right|thumb|x250px|[[Ammo racks]] of the {{PAGENAME}}]]
 +
{| class="wikitable" style="text-align:center"
 
|-
 
|-
! rowspan="2" data-sort-type="text" | Ammunition
+
! Full<br>ammo
! rowspan="2" class="unsortable" | Type of <br /> warhead
+
! 1st<br>rack empty
! rowspan="2" |Velocity <br /> in m/s
+
! Visual<br>discrepancy
! rowspan="2" |Projectile<br />Mass in kg
 
! rowspan="2" | ''Fuse delay''
 
''in m:''
 
! rowspan="2" | ''Fuse sensitivity''
 
''in mm:''
 
! rowspan="2" | ''Explosive Mass in g<br /> (TNT equivalent):''
 
! rowspan="2" | ''Normalization At 30° <br> from horizontal:''
 
! colspan="3" | ''Ricochet:''
 
 
|-
 
|-
! 0%
+
| '''1''' || 0 ''(+1)'' || No
! 50%
 
! 100%
 
|-
 
| M811 || HEFI-T* || 1100 || 0.87 || 0.2 || 0.1 || 255 || +0° || 79° || 80° || 81°
 
|-
 
| M822 || HEFI-T* || 1100 || 0.87 || 0.2 || 0.1 || 185 || +0° || 79° || 80° || 81°
 
|-
 
| 40 mm AP-T || AP-T || 1030 || 0.88 || N/A || N/A || N/A || -1° || 48° || 69° || 79°
 
 
|-
 
|-
 
|}
 
|}
 +
Notes:
  
===Belt types===
+
* With a single ammunition rack, you can bring only 1 type of ammunition in battle.
{| class="wikitable" style="text-align:center" width="100%"
 
| style="width: 8%" | '''Belts'''
 
| style="width: 20%" | '''Shell composition'''
 
| '''Combat usage'''
 
|-
 
| ''Default'' || HEFI-T* / AP-T || align="left" | Good general ammunition, a hit on an aircraft typically means its destruction while still enough to do damage to armoured ground vehicles, especially if it shoots into the side of an enemy tank (weaker armour). Good to start with until comfortable with other types of ammunition.
 
|-
 
|''40 mm AP-T'' || AP-T / AP-T / AP-T / HEFI-T* || align="left" | Very powerful ammunition which can be used against ground targets with significantly more penetration than other 35-40 mm AP-T projectiles. Will easily destroy any target with side shots even outside the point-blank range and can destroy lighter targets and weak spots from the front even against main battle tanks.
 
|-
 
|''M811'' || HEFI-T* / HEFI-T* / HEFI-T* / AP-T || align="left" | "Poor man's anti-air ammunition." Unlike the M822 shells these require direct hits to do significant damage, but if problems are experienced with M822 detonating too early this belt may be your best choice.
 
|-
 
|''M822'' || HEFI-T* / HEFI-T* / AP-T || align="left" | Proximity-fused shells that absolutely obliterate aircraft when they make contact, though if they detonate too early, they will do little to no damage. Somewhat unreliable in if they detonate within range of the target, but when they do the target will quickly take considerable damage if not destroyed. The only ammunition for self-propelled anti-aircraft guns that which can cause enough shrapnel damage to bring down planes and helicopters even with near misses. This round should be the go-to anti-air ammunition, although the M811 is a good backup if the M822 is problematic for the gunner.
 
|}
 
  
 
== Usage in battles ==
 
== Usage in battles ==
''The M247 Sgt York is a very deadly SPAA for the battle rating 8.3. The M247 is deadly to some lightly armored vehicles but even deadlier to Aircraft. When using the  M247 you can easily shred some lightly armored vehicles like the Leopard 1. Where the specialty for the M247 is with its Proximity fused 40mm rounds. They will shred any aircraft within a 2.0km radius. You can play the vehicle mostly in 2 ways. You can push and try defending caps from the enemies and keeping the skies clear, or stay back in cover and keep the skies clear for your allies and use the AP rounds on the vehicle to defend yourself from hostile vehicles.''
+
<!--''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).''-->
 +
The M247 Sgt York is a very deadly SPAA, The M247 is deadly to some lightly armored vehicles but even deadlier to Aircraft. When using the  M247 you can easily shred some lightly armored vehicles like the Leopard 1. Where the speciality for the M247 is with its Proximity fused 40 mm rounds. They will shred any aircraft within a 2.0 km radius. You can play the vehicle mostly in 2 ways. You can push and try defending caps from the enemies and keeping the skies clear, or stay back in cover and keep the skies clear for your allies and use the AP rounds on the vehicle to defend yourself from hostile vehicles.
  
=== Modules ===
+
Generally, enemy tanks should be avoided - especially from the front - but in desperate times or the right circumstances many of them can be dealt with. Due to the decent armour-piercing ammunition used by the M247, most tanks at the BR can be penetrated from the side. Common examples of tanks that are easy to penetrate from the side are the Leopard 1 and OF-40 families. Soviet tanks are a bit harder to penetrate and may not be penetrated except when nearly perpendicular to your guns. All light tanks and SPAAs can be penetrated from the side and many of them from the front as well. Again, full sized tanks should not generally be engaged except when there is no other choice, in which case aiming for the gun barrel may be the best choice, except when engaged from the side. Light vehicles, on the other hand, can be engaged favorably in most circumstances.
{| class="wikitable"
+
 
!Tier
+
'''Ammunition'''
! colspan="2" |Mobility
+
 
!Protection
+
The recommended ammunition belt is the M822 belt, which includes both the AP and HE-VT rounds.
! colspan="3" |Firepower
+
 
|-
+
This belt is the best at taking out enemy aircraft because the fuze rounds make it so that a direct hit on an aircraft is not needed, the shells must only pass near the aircraft to damage it. This belt also includes armor-piercing rounds so that if a ground target is spotted it can be engaged when necessary. The AP rounds have enough penetration (94 mm maximum) to go through the fronts of many light tanks and SPAA vehicles, as well as the sides of most other vehicles including main battle tanks (MBTs). The only class of vehicles that can not be penetrated in a majority of cases is the heavy tank class, which should be avoided as much as possible.
|I
 
|Tracks||
 
|Parts
 
|Horizontal Drive||M811||
 
|-
 
|II
 
|Suspension||Brake System
 
|FPE
 
|Adjustment of Fire||40 mm AP-T||
 
|-
 
|III
 
|Filters||
 
|Crew Replenishment
 
|Elevation Mechanism||Smoke grenade||NVD
 
|-
 
|IV
 
|Transmission||Engine
 
|
 
|Laser rangefinder||Artillery support||M822
 
|}
 
  
 
=== Pros and cons ===
 
=== Pros and cons ===
<!--''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 have a substitution in the form of softer "inadequate", "effective".''-->
+
<!-- ''Summarise 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 - use substitutions with softer forms such as "inadequate" and "effective".'' -->
  
 
'''Pros:'''
 
'''Pros:'''
  
* Twin stabilized 40 mm M266 cannon (L/70 40 mm Bofors) have a much higher rate of fire compared to the M42 Duster: Deadlier and more accurate
+
* Twin stabilized 40 mm M266 cannon (L/70 40 mm Bofors) have a much higher rate of fire compared to the M42 Duster
 
* Large ammunition count ensures that you will have plenty to fire throughout a match without fear of running out of ammo mid-game
 
* Large ammunition count ensures that you will have plenty to fire throughout a match without fear of running out of ammo mid-game
 
* Has access to 12 x 66 mm smoke grenades, perfect for exiting a dangerous situation
 
* Has access to 12 x 66 mm smoke grenades, perfect for exiting a dangerous situation
* The M822 ammunition is proximity fused and will detonate if the projectile passes close enough to the target
+
* M822 ammunition is proximity fused and will detonate if the projectile passes close enough to the target
* The 40 mm's pose a serious threat to lightly-armoured vehicles
+
* 40 mm cannons pose a serious threat to lightly-armoured vehicles, and to the sides of most tanks at close range
* Uses the M48 Patton's hull (armour included) = one of the best-protected SPAA in the game
+
* Radar allows for high range of detection and very accurate tracking, with 10 km tracking and 40 km detection range
* Benefits in realistic battles from aim-assistance thanks to the radar
+
* Has access to night vision devices
* Has access to night-vision devices for use in night battles
+
* Can retract and extend both search and tracking radars to reduce silhouette
* Large radar sweep range to easily spot targets, as well as a large radar lock-on marker in its scope
+
* Turret is thin enough for some shells to overpenetrate, doing little damage
* Can retract and extend both search and tracking radars
+
* Hull armour can bounce some lower tier shots
  
 
'''Cons:'''
 
'''Cons:'''
  
 
* As with all high-rank SPAA, the M247 has very thin turret armour; a shell strike could instantly end the vehicle
 
* As with all high-rank SPAA, the M247 has very thin turret armour; a shell strike could instantly end the vehicle
** Turret is also vulnerable to strafing aircraft + rockets
+
** Turret is also vulnerable to strafing aircraft and rockets
*Armour advantages of the hull are nullified due to the inclusion of the Hull Break mechanic of the turret
+
* Armour advantages of the hull are nullified due to the hull-break mechanic of the turret
*No thermal sight
+
* With all radar SPAA, the spinning search radar can expose your position and lead to your destruction
*With all radar SPAA, the spinning search radar can expose your position and lead to your destruction  
+
* The gunner sight optics only has one zoom setting (12.0x with a sight FOV of 6) meaning that you may struggle to engage tanks and to lock/eliminate aircraft
*The gunner sight optics only has one zoom (12.0x with a sight FOV of 6) meaning that you may struggle to engage tanks and to lock/eliminate aircraft
+
* 5 minute long reload on a capture point after depleting ammo
 +
* Tedious stock grind, with the HE-VT belt available at tier 4
 +
* Mobility is extremely sluggish when stock, will barely break 25 km/h off road without a road or hill
 +
* Will often face vehicles with APSDFS, HEAT-FS and ATGMs, which will slice right through the armour
  
 
== History ==
 
== History ==
Line 205: Line 159:
  
 
== Media ==
 
== Media ==
<!--''An excellent addition to the article will be video guides, as well as screenshots from the game and photos.''-->
+
<!-- ''Excellent additions to the article would be video guides, screenshots from the game, and photos.'' -->
[https://live.warthunder.com/feed/camouflages/?q=#m247 '''Skins''' and '''camouflages''' for the M247 Sergeant York from live.warthunder.com.]
+
 
 +
;Skins
 +
* [https://live.warthunder.com/feed/camouflages/?vehicleCountry=usa&vehicleType=tank&vehicleClass=spaa&vehicle=us_m247 Skins and camouflages for the {{PAGENAME}} from live.warthunder.com.]
  
 
== 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 series of the vehicles;''
 +
* ''links to approximate analogues of other nations and research trees.'' -->
  
* ''reference to the series of the vehicles;''
+
;Vehicles equipped with the same chassis
* ''links to approximate analogues of other nations and research trees.''-->
+
* [[M48 Patton (Family)]]
  
* [[M48A1|M48A1 Patton]]
+
;Other vehicles of similar configuration and role
* [[M42|M42 Duster]]
+
* [[AMX-30 DCA]]
* [[M163|M163 Vulcan]]
+
* [[VEAK 40]]
* [[ADATS]]
 
  
 
== 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;''
* ''encyclopedia page on tank;''
 
 
* ''other literature.''-->
 
* ''other literature.''-->
  
* [[wt:en/news/5714-development-tam-and-m247-sergeant-york-en|[Devblog<nowiki>]</nowiki> TAM and M247 Sergeant York]]
+
* [[wt:en/news/5714-development-tam-and-m247-sergeant-york-en|[Devblog] TAM and M247 Sergeant York]]
* "[https://en.wikipedia.org/wiki/M247_Sergeant_York|M247 Sergeant York]", ''Wikipedia.org'', Accessed on 24 March 2020.
+
* [[wikipedia:M247_Sergeant_York|[Wikipedia] M247 Sergeant York]]
 +
* [https://www.militaryfactory.com/armor/detail.asp?armor_id=644 <nowiki>[Military Factory]</nowiki> M247 Sergeant York]
  
 +
=== References ===
 +
<references />
 +
 +
{{TankManufacturer Ford}}
 
{{USA anti-aircraft vehicles}}
 
{{USA anti-aircraft vehicles}}
<references />
 

Revision as of 16:32, 1 March 2021

RANK 4 FRANCE
Somua SM PACK
us_m247.png
GarageImage M247.jpg
M247
AB RB SB
9.0 9.0 9.0
Class:
Research:190 000 Specs-Card-Exp.png
Purchase:520 000 Specs-Card-Lion.png
Show in game

Description

The Gun, Air Defence Artillery, Self-Propelled, 40-mm, M247 is a Rank VI American self-propelled anti-aircraft gun with a battle rating of 9.0 (AB/RB/SB). It was introduced in Update 1.81 "The Valkyries".

General info

Survivability and armour

Smoke grenades
Creation of a smoke screen in front of the vehicle
Armourfront / side / back
Hull110 / 76 / 35
Turret25 / 12 / 12
Crew3 people
Visibility192 %

Armour type:

  • Cast homogeneous armour (hull)
  • Rolled homogeneous armour (hull sides (rear bulge), hull roof, turret)
Armour Front (Slope angle) Sides Rear Roof
Hull 85-200 mm (59-74°) Front glacis
63-200 mm (13-60°) Lower glacis
76 mm (8-43°) Front
51 mm (0-43°) Rear
35 mm (26-32°) Top
25 mm (61-62°) Bottom
57 mm
Turret 25.4 mm (15-76°) Turret front (Upper)
12.7 mm (40-69°) Turret front (Lower)
25.4 mm (0-87°) Gun mantlet
12.7-25.4 mm (0-19°) Upper
12.7 mm (40-69°) Lower
12.7 mm (18°) 12.7 mm

Notes:

  • Suspension wheels and tracks are 20 mm thick.
  • Belly armour is 38 mm thick in the front half and 25 mm in the rear.

Mobility

Speedforward / back
AB53 / 9 km/h
RB and SB49 / 8 km/h
Number of gears6 forward
2 back
Weight49.4 t
Engine power
AB1 431 hp
RB and SB750 hp
Power-to-weight ratio
AB29.0 hp/t
RB and SB15.2 hp/t
Game Mode Max Speed (km/h) Weight (tons) Engine power (horsepower) Power-to-weight ratio (hp/ton)
Forward Reverse Stock Upgraded Stock Upgraded
Arcade 53 9 49.4 1,065 1,431 21.56 28.97
Realistic 49 8 663 750 13.42 15.18

The M247's turret is installed on the hull of an M48 medium tank, because of this they have roughly similar mobility. The M247 is about 3 tons heavier than the M48A1 (49.3 tons vs. 46.4 tons), and has a slightly weaker engine, which translates into a slightly more sluggish machine compared to the M48A1. The M48A1 has a max engine power of 810 hp, while the M247's engine power is 750 hp. For a vehicle this heavy, it has fairly good mobility. When spaded, it can comfortably hit a top speed of 45 km/h on flat terrain, while in cross-country you will have a top speed of around 25 km/h. While going backwards, the top speed is somewhat less impressive: about -9 km/h.

Modifications and economy

Repair costBasic → Reference
AB5 165 → 7 685 Sl icon.png
RB4 339 → 6 456 Sl icon.png
SB5 114 → 7 609 Sl icon.png
Total cost of modifications157 400 Rp icon.png
262 000 Sl icon.png
Talisman cost2 600 Ge icon.png
Crew training150 000 Sl icon.png
Experts520 000 Sl icon.png
Aces2 100 Ge icon.png
Research Aces950 000 Rp icon.png
Reward for battleAB / RB / SB
160 / 210 / 240 % Sl icon.png
220 / 220 / 220 % Rp icon.png
Modifications
Mobility Protection Firepower
Mods new tank traks.png
Tracks
Research:
8 400 Rp icon.png
Cost:
13 000 Sl icon.png
350 Ge icon.png
Mods new tank suspension.png
Suspension
Research:
7 600 Rp icon.png
Cost:
12 000 Sl icon.png
320 Ge icon.png
Mods new tank break.png
Brake System
Research:
7 600 Rp icon.png
Cost:
12 000 Sl icon.png
320 Ge icon.png
Mods new tank filter.png
Filters
Research:
8 400 Rp icon.png
Cost:
13 000 Sl icon.png
350 Ge icon.png
Mods new tank transmission.png
Transmission
Research:
11 000 Rp icon.png
Cost:
17 000 Sl icon.png
460 Ge icon.png
Mods new tank engine.png
Engine
Research:
11 000 Rp icon.png
Cost:
17 000 Sl icon.png
460 Ge icon.png
Mods tank tool kit.png
Improved Parts
Research:
2 500 Rp icon.png
Cost:
13 000 Sl icon.png
350 Ge icon.png
Mods extinguisher.png
Improved FPE
Research:
2 300 Rp icon.png
Cost:
12 000 Sl icon.png
320 Ge icon.png
Mods tank reinforcement us.png
Crew Replenishment
Research:
8 400 Rp icon.png
Cost:
13 000 Sl icon.png
350 Ge icon.png
Mods new tank horizontal aiming.png
Horizontal Drive
Research:
8 400 Rp icon.png
Cost:
13 000 Sl icon.png
350 Ge icon.png
Mods tank ammo.png
40mm_SGT_YORK_HE_ammo_pack
Research:
8 400 Rp icon.png
Cost:
13 000 Sl icon.png
350 Ge icon.png
Mods tank cannon.png
Adjustment of Fire
Research:
7 600 Rp icon.png
Cost:
12 000 Sl icon.png
320 Ge icon.png
Mods tank ammo.png
40mm_SGT_YORK_AP_ammo_pack
Research:
7 600 Rp icon.png
Cost:
12 000 Sl icon.png
320 Ge icon.png
Mods new tank vertical aiming.png
Elevation Mechanism
Research:
8 400 Rp icon.png
Cost:
13 000 Sl icon.png
350 Ge icon.png
Mods smoke screen.png
Smoke grenade
Research:
8 400 Rp icon.png
Cost:
13 000 Sl icon.png
350 Ge icon.png
Mods night vision device.png
NVD
Research:
8 400 Rp icon.png
Cost:
13 000 Sl icon.png
350 Ge icon.png
Mods tank laser rangefinder.png
Laser rangefinder
Research:
11 000 Rp icon.png
Cost:
17 000 Sl icon.png
460 Ge icon.png
Mods art support.png
Artillery Support
Research:
11 000 Rp icon.png
Cost:
17 000 Sl icon.png
460 Ge icon.png
Mods tank ammo.png
40mm_SGT_YORK_HE_prox_ammo_pack
Research:
11 000 Rp icon.png
Cost:
17 000 Sl icon.png
460 Ge icon.png

Armaments

Laser rangefinder
Reduces the error and increases the maximum measurable distance of the rangefinder
Night vision device
Improves visibility by enhancing natural light or active illumination.

Main armament

2 x 40 mm M266 automatic cannon
Two-plane stabilizer
Reduces the swing of the gun in two planes while moving
Ammunition500 rounds
Belt capacity125 rounds
Reloadbasic crew → aces
6.5 → 5.0 s
Fire rate300 shots/min
Vertical guidance-10° / 85°
Main article: M266 (40 mm)
40 mm M266 automatic Cannon (x2) Turret rotation speed (°/s) Reloading rate (seconds)
Mode Capacity (Belt) Fire rate Vertical Horizontal Stabilizer Stock Upgraded Full Expert Aced Stock Full Expert Aced
Arcade 560 (280) 300 -10°/+85° ±180° Two-plane 79.3 109.4 111.3 112.1 113.2 6.5 5.8 5.3 5.0
Realistic 53.5 63.1 69.8 73.8 76.5

Ammunition

  • Default: HEFI-T* · AP-T - Good general ammunition, a hit on an aircraft typically means its destruction while still enough to do damage to armoured ground vehicles, especially if it shoots into the side of an enemy tank (weaker armour). Good to start with until comfortable with other types of ammunition.
  • 40 mm AP-T: AP-T · AP-T · AP-T · HEFI-T* - Very powerful ammunition which can be used against ground targets with significantly more penetration than other 35-40 mm AP-T projectiles. Will easily destroy any target with side shots even outside the point-blank range and can destroy lighter targets and weak spots from the front even against main battle tanks.
  • M811: HEFI-T* · HEFI-T* · HEFI-T* · AP-T - Unlike the M822 shells these require direct hits on aircraft to do significant damage, but if problems are experienced with M822 detonating too early this belt may be your best choice.
  • M822: HE-VT* · HE-VT* · AP-T - Proximity-fused shells that absolutely obliterate aircraft when they make contact, though if they detonate too early, they will do little to no damage. Somewhat unreliable in if they detonate within range of the target, but when they do the target will quickly take considerable damage if not destroyed. The only ammunition for self-propelled anti-aircraft guns that which can cause enough shrapnel damage to bring down planes and helicopters even with near misses. This round should be the go-to anti-air ammunition, although the M811 is a good backup if the M822 is problematic for the gunner.
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
Default HEFI-T*/AP-T 94 90 77 62 51 41
40 mm AP-T AP-T/HEFI-T* 94 90 77 62 51 41
M811 HEFI-T*/AP-T 94 90 77 62 51 41
M822 HE-VT*/AP-T 94 90 77 62 51 41

Ammo racks

Ammo racks of the M247
Full
ammo
1st
rack empty
Visual
discrepancy
1 0 (+1) No

Notes:

  • With a single ammunition rack, you can bring only 1 type of ammunition in battle.

Usage in battles

The M247 Sgt York is a very deadly SPAA, The M247 is deadly to some lightly armored vehicles but even deadlier to Aircraft. When using the M247 you can easily shred some lightly armored vehicles like the Leopard 1. Where the speciality for the M247 is with its Proximity fused 40 mm rounds. They will shred any aircraft within a 2.0 km radius. You can play the vehicle mostly in 2 ways. You can push and try defending caps from the enemies and keeping the skies clear, or stay back in cover and keep the skies clear for your allies and use the AP rounds on the vehicle to defend yourself from hostile vehicles.

Generally, enemy tanks should be avoided - especially from the front - but in desperate times or the right circumstances many of them can be dealt with. Due to the decent armour-piercing ammunition used by the M247, most tanks at the BR can be penetrated from the side. Common examples of tanks that are easy to penetrate from the side are the Leopard 1 and OF-40 families. Soviet tanks are a bit harder to penetrate and may not be penetrated except when nearly perpendicular to your guns. All light tanks and SPAAs can be penetrated from the side and many of them from the front as well. Again, full sized tanks should not generally be engaged except when there is no other choice, in which case aiming for the gun barrel may be the best choice, except when engaged from the side. Light vehicles, on the other hand, can be engaged favorably in most circumstances.

Ammunition

The recommended ammunition belt is the M822 belt, which includes both the AP and HE-VT rounds.

This belt is the best at taking out enemy aircraft because the fuze rounds make it so that a direct hit on an aircraft is not needed, the shells must only pass near the aircraft to damage it. This belt also includes armor-piercing rounds so that if a ground target is spotted it can be engaged when necessary. The AP rounds have enough penetration (94 mm maximum) to go through the fronts of many light tanks and SPAA vehicles, as well as the sides of most other vehicles including main battle tanks (MBTs). The only class of vehicles that can not be penetrated in a majority of cases is the heavy tank class, which should be avoided as much as possible.

Pros and cons

Pros:

  • Twin stabilized 40 mm M266 cannon (L/70 40 mm Bofors) have a much higher rate of fire compared to the M42 Duster
  • Large ammunition count ensures that you will have plenty to fire throughout a match without fear of running out of ammo mid-game
  • Has access to 12 x 66 mm smoke grenades, perfect for exiting a dangerous situation
  • M822 ammunition is proximity fused and will detonate if the projectile passes close enough to the target
  • 40 mm cannons pose a serious threat to lightly-armoured vehicles, and to the sides of most tanks at close range
  • Radar allows for high range of detection and very accurate tracking, with 10 km tracking and 40 km detection range
  • Has access to night vision devices
  • Can retract and extend both search and tracking radars to reduce silhouette
  • Turret is thin enough for some shells to overpenetrate, doing little damage
  • Hull armour can bounce some lower tier shots

Cons:

  • As with all high-rank SPAA, the M247 has very thin turret armour; a shell strike could instantly end the vehicle
    • Turret is also vulnerable to strafing aircraft and rockets
  • Armour advantages of the hull are nullified due to the hull-break mechanic of the turret
  • With all radar SPAA, the spinning search radar can expose your position and lead to your destruction
  • The gunner sight optics only has one zoom setting (12.0x with a sight FOV of 6) meaning that you may struggle to engage tanks and to lock/eliminate aircraft
  • 5 minute long reload on a capture point after depleting ammo
  • Tedious stock grind, with the HE-VT belt available at tier 4
  • Mobility is extremely sluggish when stock, will barely break 25 km/h off road without a road or hill
  • Will often face vehicles with APSDFS, HEAT-FS and ATGMs, which will slice right through the armour

History

The M247 "Sergeant York" was designed in the late 1970's as a purpose-built SPAAG. It was designed to fight alongside the M1 Abrams and M2/M3 Bradley, in order to provide cover against aircraft. There were other SPAA vehicles in service at the time; these were the M163 Vulcan and the MIM-72/M48 Chaparral. The former being a 20 mm rotary cannon mounted on an armored personnel carrier, and the latter being a heavily modified armored personnel carrier chassis with a surface-to-air missile launcher. Neither of those two vehicles were designed as SPAA's, and so, did not have the necessary performance to be adequate at their job. The M247 was designed as a replacement for both of the previous vehicles.

Designs from a multitude of companies were entered into the competition. Only two were selected for testing: the Ford XM-247 with twin Bofors 40mm cannons and the General Dynamics XM-246 with twin Oerlikon 35mm cannons. The two prototypes were tested, and the XM-247 was selected as the winner, although the XM-246 had outscored it in all the shooting tests. The M247, as it was soon designated, ran into many problems. The radar was extremely deficient; it had a hard time distinguishing trees from planes, and if the guns were pointed too high, they would get in the radar's way and confuse it even more. In addition, it took too long for the radar to pick up a target and for the guns to actually take aim. In addition, the turret traverse speed was much too slow, the vehicle it's self was too sluggish to keep up the M1's and M2's, and it was unreliable in cold weather. Eventually, the program was cancelled after more testing, where it was proven the system could not even shoot down stationary drones. There was still a need for an anti-aircraft vehicle that could keep up with modern vehicles, so Oerlikon Canada created the ADATS anti-aircraft missile system. This was not as successful as hoped, and was only accepted into Canadian service. The void was eventually filled by the M6 Linebacker, an M2 Bradley with Stinger missiles instead of TOW missiles. The Linebacker was capable of keeping up with modern armored forces, which was the reason for its acceptance, even though the Stingers were not as effective as the ADATS missiles[1].

Media

Skins

See also

Vehicles equipped with the same chassis
Other vehicles of similar configuration and role

External links

References


Ford Motor Company
Armoured cars  M8 Greyhound
SPAAGs  M247 Sergeant York
Export  ␗M8 LAC

USA anti-aircraft vehicles
M3 Half-track derivatives  M13 MGMC · M15 CGMC · M16 MGMC
M24 derivative  M19A1
M41 derivative  M42
Radar SPAAG  M163 · M247
Missile SPAA  Imp.Chaparral · LAV-AD · XM975