Difference between revisions of "M50"

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== Description ==
 
== Description ==
<!--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.-->
+
<!-- ''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.'' -->
 
[[File:GarageImage_{{PAGENAME}}.jpg|420px|thumb|left]]
 
[[File:GarageImage_{{PAGENAME}}.jpg|420px|thumb|left]]
{{break}}
+
{{Break}}
The '''{{Specs|name}}''', also known by the nickname '''Ontos''', is a rank {{Specs|rank}} American tank destroyer {{Battle-rating}}. It was introduced in [[Update 1.71 "New E.R.A"]].
+
The '''{{Specs|name}}''', also known by the nickname '''Ontos''', is a rank {{Specs|rank}} American tank destroyer {{Battle-rating}}. It was introduced in [[Update 1.71 "New E.R.A."]].
  
 
The M50 "Ontos" is pretty much a bulky carrier of recoilless rifles, carrying a payload of six shells of devastating HEAT and HESH shells. With six launchers pointing forwards, a well-emplaced M50 can point itself downrange and once a target comes into its sights, unleash all shells until the target is annihilated.
 
The M50 "Ontos" is pretty much a bulky carrier of recoilless rifles, carrying a payload of six shells of devastating HEAT and HESH shells. With six launchers pointing forwards, a well-emplaced M50 can point itself downrange and once a target comes into its sights, unleash all shells until the target is annihilated.
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== General info ==
 
== General info ==
 
=== Survivability and armour ===
 
=== Survivability and 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? If necessary use a visual template to indicate the most secure and weak zones of the armour.'' -->
 
 
If necessary use a visual template to indicate the most secure and weak zones of the armour.-->
 
 
{| class="wikitable"
 
{| class="wikitable"
 
|-
 
|-
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<!-- ''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= 206|rbMinHp= 128|<!--AoAweight=(optional) -->}}
+
{{tankMobility|abMinHp=206|rbMinHp=128}}
  
 
== Armaments ==
 
== Armaments ==
 
=== Main armament ===
 
=== Main armament ===
<!--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.-->
+
<!-- ''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.'' -->
 
{{main|M40A1C (106 mm)}}
 
{{main|M40A1C (106 mm)}}
 +
 +
The turret displacement is limited without being a huge handicap as it allows to cover a wide area without (±40°) having to reposition the hull. And in the case your guns reach a stop, repositioning the hull is quickly done.
 +
 +
The targeting process is manual and in average twice slower than tanks with turrets at the same tier or battle rating. However, the recoilless nature of the guns eliminates the need for retargeting between shots as the recoil is minimal. The short delay between shots eliminates the need for repositioning as it does not leave the target any time to retaliate.
 +
 +
An aspect to consider is the offset of the guns from the central target sight: at close range its impact is minimal but becomes noticeable when firing at specific weak spots on targets at a distance. Using the scouting MGs can help you assess the off-set but will reveal your position. Given the rifles layout of the Ontos, it is recommended to fire by salvos of 3 shells to guarantee a good balance between rate of fire and accuracy.
 +
 +
Like for a SPAA belt, you have to fire all 6 rifles before being allowed to start the reloading process. Your ammo capacity of 18 shells total (or 3 belts of 6) is limited, which will impact your combat performance as you're very likely to have to disengage in order to restock during a battle.
 +
 
{| class="wikitable" style="text-align:center" width="100%"
 
{| class="wikitable" style="text-align:center" width="100%"
 
|-
 
|-
 
! colspan="5" | [[M40A1C (106 mm)|106 mm M40A1C]] || colspan="5" | Turret rotation speed (°/s) || colspan="4" | Reloading rate (seconds)
 
! colspan="5" | [[M40A1C (106 mm)|106 mm M40A1C]] || colspan="5" | Turret rotation speed (°/s) || colspan="4" | Reloading rate (seconds)
 
|-
 
|-
! Mode
+
! Mode !! Capacity !! Vertical !! Horizontal !! Stabilizer
! Capacity (Belt capacity)
+
! Stock !! Upgraded !! Full !! Expert !! Aced
! Vertical
+
! Stock !! Full !! Expert !! Aced
! Horizontal
 
! Stabilizer
 
! Stock
 
! Upgraded
 
! Full
 
! Expert
 
! Aced
 
! Stock
 
! Full
 
! Expert
 
! Aced
 
 
|-
 
|-
 
! ''Arcade''
 
! ''Arcade''
| rowspan="2" | 18 (6) || rowspan="2" | -10°/+20° || rowspan="2" | ±40° || rowspan="2" | N/A || 15.9 || 21.|| 26.68  || 29.46 || 31.34 || rowspan="2" | 16.90 || rowspan="2" | 14.95 || rowspan="2" | 13.78 || rowspan="2" | 13.00
+
| rowspan="2" | 18 || rowspan="2" | -10°/+20° || rowspan="2" | ±40° || rowspan="2" | N/A || 18.65 || 21.94 || 26.64 || 29.46 || 31.34 || rowspan="2" | 16.90 || rowspan="2" | 14.95 || rowspan="2" | 13.78 || rowspan="2" | 13.00
 
|-
 
|-
 
! ''Realistic''
 
! ''Realistic''
| 10.7 || 12.6 || 15.3 || 16.9 || 18.0
+
| 10.71 || 12.60 || 15.30 || 16.92 || 18.00
 
|-
 
|-
 
|}
 
|}
The turret displacement is limited without being a huge handicap as it allows to cover a wide area without (±40°) having to reposition the hull. And in the case your guns reach a stop, repositioning the hull is quickly done.
 
 
The targeting process is manual and in average twice slower than tanks with turrets at the same tier or battle rating. However, the recoilless nature of the guns eliminates the need for retargeting between shots as the recoil is minimal. The short delay between shots eliminates the need for repositioning as it does not leave the target any time to retaliate.
 
  
An aspect to consider is the offset of the guns from the central target sight: at close range its impact is minimal but becomes noticeable when firing at specific weak spots on targets at a distance. Using the scouting MGs can help you assess the off-set but will reveal your position. Given the rifles layout of the Ontos, it is recommended to fire by salvos of 3 shells to guarantee a good balance between rate of fire and accuracy.
+
==== Ammunition ====
 
 
Like for a SPAA belt, you have to fire all 6 rifles before being allowed to start the reloading process. Your ammo capacity of 18 shells total (or 3 belts of 6) is limited, which will impact your combat performance as you're very likely to have to disengage in order to restock during a battle.
 
 
 
===== Ammunition =====
 
 
{| 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)'''
 
|-
 
|-
! 10m
+
! 10 m !! 100 m !! 500 m !! 1,000 m !! 1,500 m !! 2,000 m
! 100m
 
! 500m
 
! 1000m
 
! 1500m
 
! 2000m
 
 
|-
 
|-
| M344A1 || HEAT || 381 || 381 || 381 || 381 || 381 || 381
+
| M344A1 || HEAT || 433 || 433 || 433 || 433 || 433 || 433
 
|-
 
|-
 
| M361A1 || HESH || 152 || 152 || 152 || 152 || 152 || 152
 
| M361A1 || HESH || 152 || 152 || 152 || 152 || 152 || 152
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|}
 
|}
 
{| class="wikitable sortable" style="text-align:center" width="100%"
 
{| class="wikitable sortable" style="text-align:center" width="100%"
! colspan="11" | Shell details
+
! colspan="10" | Shell details
 
|-
 
|-
 
! 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
! rowspan="2" |Velocity <br /> in m/s
+
! rowspan="2" | Velocity<br>(m/s)
! rowspan="2" |Projectile<br />Mass in kg
+
! rowspan="2" | Projectile<br>Mass (kg)
! rowspan="2" | ''Fuse delay''
+
! rowspan="2" | Fuse delay<br>(m)
''in m:''
+
! rowspan="2" | Fuse sensitivity<br>(mm)
! rowspan="2" | ''Fuse sensitivity''
+
! rowspan="2" | Explosive Mass<br>(TNT equivalent) (g)
''in mm:''
+
! colspan="3" | Ricochet
! rowspan="2" | ''Explosive Mass in g<br /> (TNT equivalent):''
 
! rowspan="2" | ''Normalization At 30° <br> from horizontal:''
 
! colspan="3" | ''Ricochet:''
 
 
|-
 
|-
! 0%
+
! 0% !! 50% !! 100%
! 50%
 
! 100%
 
 
|-
 
|-
| M344A1 || HEAT || 502 || 10 || 0.0 || 0.1 || 1,650 || +0° || 62° || 69° || 73°
+
| M344A1 || HEAT || 502 || 10.0 || N/A || 0.5 || 1,650 || 65° || 72° || 77°
 
|-
 
|-
| M361A1 || HESH || 498 || 10 || 0.4 || 0.1 || 5,040 || +0° || 73° || 77° || 80°
+
| M361A1 || HESH || 498 || 10.0 || 0.4 || 0.1 || 5,040 || 73° || 77° || 80°
 
|-
 
|-
 
|}
 
|}
  
===== [[Ammo racks|Ammo racks]] =====
+
==== [[Ammo racks]] ====
[[File:Ammoracks_{{PAGENAME}}.png|right|thumbnail|x250px|Ammo racks of the M50.]]
+
[[File:Ammoracks_{{PAGENAME}}.png|right|thumb|x250px|[[Ammo racks]] of the {{PAGENAME}}]]
{| class="wikitable sortable" style="text-align:center"
+
{| class="wikitable" style="text-align:center"
 
|-
 
|-
! class="wikitable unsortable" |Full<br /> ammo
+
! Full<br>ammo
! class="wikitable unsortable" |1st<br /> rack empty
+
! 1st<br>rack empty
! class="wikitable unsortable" |2nd<br /> rack empty
+
! 2nd<br>rack empty
! class="wikitable unsortable" |Visual<br /> discrepancy
+
! Visual<br>discrepancy
 
|-
 
|-
|| '''18''' || 14&nbsp;''(+4)'' || 0&nbsp;''(+18)'' || style="text-align:left" | No
+
| '''18''' || 14&nbsp;''(+4)'' || 0&nbsp;''(+18)'' || No
 
|-
 
|-
 
|}
 
|}
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=== Machine guns ===
 
=== Machine guns ===
<!--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.-->
+
<!-- ''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.'' -->
{{main|M8C (12.7 mm)|Browning (7.62 mm)}}
+
{{main|M80 (12.7 mm)|M1919A4 (7.62 mm)}}
  
 
{| class="wikitable" style="text-align:center"
 
{| class="wikitable" style="text-align:center"
 
|-
 
|-
! colspan="7" | [[M8C (12.7 mm)|12.7 mm M8C]]
+
! colspan="5" | [[M80 (12.7 mm)|12.7 mm M80]]
 +
|-
 +
! Mount
 +
! Capacity<br>(Belt capacity)
 +
! Rate of fire<br>(shots/minute)
 +
! Vertical<br>guidance
 +
! Horizontal<br>guidance
 +
|-
 +
| Coaxial || 120 (5) || 300 || N/A || N/A
 
|-
 
|-
! colspan="7" | ''Coaxial mount'' (x4)
+
| Coaxial || 120 (5) || 300 || N/A || N/A
 
|-
 
|-
! colspan="4" rowspan="1" style="width:5em" |Capacity (Belt capacity each)
+
| Coaxial || 120 (5) || 300 || N/A || N/A
! rowspan="1" | Fire rate <br> (shots/minute)
 
! rowspan="1" | Vertical <br> guidance
 
! rowspan="1" | Horizontal <br> guidance
 
 
|-
 
|-
| colspan="4" | 480 (4) || 300 || N/A || N/A
+
| Coaxial || 120 (5) || 300 || N/A || N/A
 
|-
 
|-
 
|}
 
|}
 
{| class="wikitable" style="text-align:center"
 
{| class="wikitable" style="text-align:center"
 
|-
 
|-
! colspan="7" | [[Browning (7.62 mm)|7.62 mm M1919A4]]
+
! colspan="5" | [[M1919A4 (7.62 mm)|7.62 mm M1919A4]]
|-
 
! colspan="7" | ''Pintle mount''
 
 
|-
 
|-
! colspan="4" rowspan="1" style="width:5em" |Capacity (Belt capacity)
+
! Mount
! rowspan="1" | Fire rate <br> (shots/minute)
+
! Capacity<br>(Belt capacity)
! rowspan="1" | Vertical <br> guidance
+
! Rate of fire<br>(shots/minute)
! rowspan="1" | Horizontal <br> guidance
+
! Vertical<br>guidance
 +
! Horizontal<br>guidance
 
|-
 
|-
| colspan="4" | 1,000 (250) || 500 || -5°/+50° || ±70°
+
| Pintle || 1,000 (250) || 500 || -5°/+50° || ±70°
 
|-
 
|-
 
|}
 
|}
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[[File:M50 Ontos at the National Museum of the Marine Corps.jpg|thumb|310x310px|M50 Ontos at the National Museum of the Marine Corps]]
 
[[File:M50 Ontos at the National Museum of the Marine Corps.jpg|thumb|310x310px|M50 Ontos at the National Museum of the Marine Corps]]
  
Obviously the M50 is not a main battle tank, with its thin armour even Reserve units are a threat! Stealth and guile is the tactic, using its high mobility and small size to get in ambush or outflank an enemy push fast. Memorize shooting spots, be it concealed ambush points or sheltered ranged locations overlooking active routes. The most important tactic is '''''learn how to operate it!''''' Keymap a separate trigger for the spotting gun and learn the firing sequence! Nothing worse than sight a perfect target, but the gun on the wrong side is fired into a rock! Also keep in mind the turret has only 80 degrees of traverse (+/- 40), a consideration during tactical maneuvers. Still, compared to other ATG's this traverse is much wider, and also has a respectable -10 depression. Add that -10 degrees and angled position to the already extremely sloped front glacis armor and one could be bouncing large caliber AP rounds! Don't forgot to spot enemies too, make them feel the pressure, not you.
+
Obviously the M50 is not a main battle tank, with its thin armour even Reserve units are a threat! Stealth and guile is the tactic, using its high mobility and small size to get in ambush or outflank an enemy push fast. Memorize shooting spots, be it concealed ambush points or sheltered ranged locations overlooking active routes. The most important tactic is '''''learn how to operate it!''''' Keymap a separate trigger for the spotting gun and learn the firing sequence! Nothing worse than sight a perfect target, but the gun on the wrong side is fired into a rock! Also keep in mind the turret has only 80 degrees of traverse (+/- 40), a consideration during tactical manoeuvres. Still, compared to other ATG's this traverse is much wider, and also has a respectable -10 depression. Add that -10 degrees and angled position to the already extremely sloped front glacis armour and one could be bouncing large calibre AP rounds! Don't forgot to spot enemies too, make them feel the pressure, not you.
  
 
=== Modules ===
 
=== Modules ===
 
{| class="wikitable"
 
{| class="wikitable"
!Tier
+
! Tier
! colspan="2" |Mobility
+
! colspan="2" | Mobility
!Protection
+
! Protection
! colspan="2" |Firepower
+
! colspan="2" | Firepower
 
|-
 
|-
|I
+
| I
|Tracks||
+
| Tracks
|Parts
+
|
|Horizontal Drive||
+
| Parts
 +
| Horizontal Drive
 +
|
 
|-
 
|-
|II
+
| II
|Suspension||Brake System
+
| Suspension
|FPE
+
| Brake System
|Adjustment of Fire||Airstrike
+
| FPE
 +
| Adjustment of Fire
 +
| Airstrike
 
|-
 
|-
|III
+
| III
|Filters||
+
| Filters
|Crew Replenishment
+
|
|Elevation Mechanism||
+
| Crew Replenishment
 +
| Elevation Mechanism
 +
|
 
|-
 
|-
|IV
+
| IV
|Transmission||Engine
+
| Transmission
 +
| Engine
 +
|
 +
| Improved optics
 
|
 
|
|Improved optics||
+
|-
 
|}
 
|}
  
 
=== Pros and cons ===
 
=== Pros and cons ===
<!--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".-->
+
<!-- ''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:'''
  
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== History ==
 
== History ==
<!--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 long, 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 dev blog entry (if applicable) and the in-game encyclopedia description (under <code><nowiki>=== In-game description ===</nowiki></code>, also if applicable).-->
+
<!-- ''Describe the history of the creation and combat usage of the vehicle 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 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></ref></nowiki></code>, as well as adding them at the end of the article with <code><nowiki><references /></nowiki></code>. This section may also include the vehicle's dev blog entry (if applicable) and the in-game encyclopedia description (under <code><nowiki>=== In-game description ===</nowiki></code>, also if applicable).'' -->
It was such a strange “tank” the only word the US Army could think of for this strange thing was, well, “Thing”, except someone was clever and used the Greek word, '''ὄντος''' (really, truly [exists]).  Due to mountainous and difficult terrain of Korea brought the US Army revisited the idea of a light tank.  It was quite an ingenious design made very quickly.  The prototype was based on an M56 Scorpion ATG chassis, used a common truck engine, and mounted six very powerful M40A1C recoilless rifle guns and be light enough for air transport.  The prototype was finished in 1952 and by 1955 completed its testing where it fulfilled its design requirements, but the Army simply did not like this monstrosity and decided against it.  The US Marines on the other hand was not as picky and loved this highly mobile light tank with a huge punch, so ordered 297 in 1955.  The design was reworked with a new chassis, new running gear with wide thread (ditching the M56 design), better internal layout, and other minor improvements that made the Ontos a unique one off design.   While it had a few flaws, it was reliable enough to accomplish its mission.
+
It was such a strange "tank" the only word the US Army could think of for this strange thing was, well, "Thing", except someone was clever and used the Greek word, '''ὄντος''' (really, truly [exists]). Due to mountainous and difficult terrain of Korea brought the US Army revisited the idea of a light tank. It was quite an ingenious design made very quickly. The prototype was based on an M56 Scorpion ATG chassis, used a common truck engine, and mounted six very powerful M40A1C recoilless rifle guns and be light enough for air transport. The prototype was finished in 1952 and by 1955 completed its testing where it fulfilled its design requirements, but the Army simply did not like this monstrosity and decided against it. The US Marines on the other hand was not as picky and loved this highly mobile light tank with a huge punch, so ordered 297 in 1955. The design was reworked with a new chassis, new running gear with wide thread (ditching the M56 design), better internal layout, and other minor improvements that made the Ontos a unique one off design. While it had a few flaws, it was reliable enough to accomplish its mission.
  
The key to the M50’s offensive power is the 106mm M40A1C recoilless rifle firing devastating HEAT or HESH (later an anti-infantry "beehive") rounds with its integrated M8C .50 cal spotting rifle using a 10 or 20 round magazine. It should be noted the M8C is a shorter round (12.7x77mm, M48A2 Spotter-Tracer (S) bullets only) that the better known .50 AN/M2 BMG (12.7x99mm).  Every M40 produced had the M8C, but on the M50 the lowest 2 barrels have this spotting rifle removed leaving an empty mounting post.   If wanted (but not recommended) all 6 guns can be fired at once delivering far more destructive offensive load than any tank then or today.  The nature of recoilless rifles is a powerful blow back, during a test firing all 6 simultaneously it knocked bricks out of a building and shattered a few car windows.  In between is mounted a single pintel mounted .30 caliber M1919A4 machine gun for anti-infantry use.
+
The key to the M50’s offensive power is the 106mm M40A1C recoilless rifle firing devastating HEAT or HESH (later an anti-infantry "beehive") rounds with its integrated M8C .50 cal spotting rifle using a 10 or 20 round magazine. It should be noted the M8C is a shorter round (12.7x77mm, M48A2 Spotter-Tracer (S) bullets only) that the better known .50 AN/M2 BMG (12.7x99mm). Every M40 produced had the M8C, but on the M50 the lowest 2 barrels have this spotting rifle removed leaving an empty mounting post. If wanted (but not recommended) all 6 guns can be fired at once delivering far more destructive offensive load than any tank then or today. The nature of recoilless rifles is a powerful blow back, during a test firing all 6 simultaneously it knocked bricks out of a building and shattered a few car windows. In between is mounted a single pintel mounted .30 calibre M1919A4 machine gun for anti-infantry use.
  
The first combat use of the Ontos occurred in 1964 Dominican Republic Civil War where it reported destroyed an AMX-13 and an old Swedish L-60 (the only time it was used for purpose built, destroying tanks). But it was the following year when it was deployed to Vietnam did it shine. 
+
The first combat use of the Ontos occurred in 1964 Dominican Republic Civil War where it reported destroyed an AMX-13 and an old Swedish L-60 (the only time it was used for purpose built, destroying tanks). But it was the following year when it was deployed to Vietnam did it shine.  
  
Vietnam was extremely hostile to tanks not due to enemies but the environment.  Jungle, swamp, rice fields, mountains, rivers, a limited road network with small bridges; it was a nightmare for regular tanks but the Ontos could glide over them with ease.  Enemy Vietnamese troops rarely used tanks and few anti-tank guns so there was little threat from them, the paper thin armor was more than enough to resist small arms and heavy MG fire most often encountered.  The significant vulnerability of reloading the 6 guns was largely moot as the fearsome reputation of this 6 shooter beast often cleared out enemy positions soon after it started shooting.  Unfortunately its age was its greatest enemy.  Over 10 years old and long out of production breakdowns became more frequent, some were cannibalized for parts and the turrets where mounted to fixed positions as point defense.  Despite its unprecedented success in Vietnam its limited numbers, scattered deployment, breakdowns, and frequent rotation, it did not gain as much fame as it could have. More of footnote today, this unusual tank was the perfect vehicle for very difficult conflict.
+
Vietnam was extremely hostile to tanks not due to enemies but the environment. Jungle, swamp, rice fields, mountains, rivers, a limited road network with small bridges; it was a nightmare for regular tanks but the Ontos could glide over them with ease. Enemy Vietnamese troops rarely used tanks and few anti-tank guns so there was little threat from them, the paper thin armour was more than enough to resist small arms and heavy MG fire most often encountered. The significant vulnerability of reloading the 6 guns was largely moot as the fearsome reputation of this 6 shooter beast often cleared out enemy positions soon after it started shooting. Unfortunately its age was its greatest enemy. Over 10 years old and long out of production breakdowns became more frequent, some were cannibalized for parts and the turrets where mounted to fixed positions as point defence. Despite its unprecedented success in Vietnam its limited numbers, scattered deployment, breakdowns, and frequent rotation, it did not gain as much fame as it could have. More of footnote today, this unusual tank was the perfect vehicle for very difficult conflict.
  
 
== Media ==
 
== Media ==
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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:''
 
''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;''
 
* ''reference to the series of the vehicles;''
 
* ''links to approximate analogues of other nations and research trees.''
 
* ''links to approximate analogues of other nations and research trees.''
  
 
== External links ==
 
== External links ==
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<!-- ''Paste links to sources and external resources, such as:''
 
* ''topic on the official game forum;''
 
* ''topic on the official game forum;''
 
* ''encyclopedia page on the tank;''
 
* ''encyclopedia page on the tank;''
* ''other literature.''-->
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* ''other literature.'' -->
  
 
* [[wt:en/news/4905-gamescom-m50-ontos-something-out-of-the-ordinary-en|[Devblog] M50 Ontos - Something Out of The Ordinary]]
 
* [[wt:en/news/4905-gamescom-m50-ontos-something-out-of-the-ordinary-en|[Devblog] M50 Ontos - Something Out of The Ordinary]]
  
 
{{USA tank destroyers}}
 
{{USA tank destroyers}}

Revision as of 09:01, 29 April 2020

RANK 6 SWEDEN
CV 90105 TML PACK
Rifle, Multiple, 106-mm, Self-Propelled, M50
us_m50_ontos.png
AB
RB
SB
General characteristics
Brief
Detailed
6.7/6.7/6.7BR
2 peopleCrew
72 %Visibility
front / side / backArmour
13 / 13 / 13Hull
0 / 0 / 0Turret
Mobility
8.3 tWeight
277 hp145 hpEngine power
33 hp/t18 hp/tPower-to-weight ratio
52 km/h forward
8 km/h back
48 km/h forward
7 km/h back
Speed
Armament
106 mm Recoilless Rifle M40A1CMain weapon
18 roundsAmmunition
13.0 / 16.9 sReload
6 roundsBelt capacity
120 shots/minFire rate
-10° / 20°Vertical guidance
-40° / 40°Horizontal guidance
4 x 12.7 mm M80 machine gunSecondary weapon
480 roundsAmmunition
2.5 / 3.2 sReload
5 roundsBelt capacity
300 shots/minFire rate
1 000 roundsAmmunition
8.0 / 10.4 sReload
250 roundsBelt capacity
500 shots/minFire rate
Economy
95 000 Rp icon.pngResearch
260 000 Sl icon.pngPurchase
Sl icon.png6 640 / 8 691/5 170 / 6 767/1 800 / 2 356Repair
75 000 Sl icon.pngCrew training
260 000 Sl icon.pngExperts
1 100 Ge icon.pngAces
190 % Rp icon.pngReward for battle
180 % Sl icon.png140 % Sl icon.png90 % Sl icon.png

Description

GarageImage M50.jpg


The Rifle, Multiple, 106-mm, Self-Propelled, M50, also known by the nickname Ontos, is a rank V American tank destroyer with a battle rating of 6.7 (AB/RB/SB). It was introduced in Update 1.71 "New E.R.A.".

The M50 "Ontos" is pretty much a bulky carrier of recoilless rifles, carrying a payload of six shells of devastating HEAT and HESH shells. With six launchers pointing forwards, a well-emplaced M50 can point itself downrange and once a target comes into its sights, unleash all shells until the target is annihilated.

A stealthy and pouncing game style is needed to make the most of the hard-hitting guns and the thin armour of the Ontos.

General info

Survivability and armour

Armour Front (Slope angle) Sides Rear Roof
Hull 10-13 (70°) Front glacis
13 mm (45-66°) Lower glacis
13 mm (43°) Top
13 mm Bottom
13 mm (36°) Top
13 mm Bottom
13 mm
Armour Sides Roof
Cupola 13 mm 13 mm

Notes:

  • Suspension wheels and torsion bars are 20 mm thick while tracks are 15 mm thick.

Mobility

Game Mode Max Speed (km/h) Weight (tons) Engine power (horsepower) Power-to-weight ratio (hp/ton)
Forward Reverse Stock Upgraded Stock Upgraded
Arcade 52 8 8.3 206 277 24.82 33.37
Realistic 48 7 128 145 15.42 17.47

Armaments

Main armament

Main article: M40A1C (106 mm)

The turret displacement is limited without being a huge handicap as it allows to cover a wide area without (±40°) having to reposition the hull. And in the case your guns reach a stop, repositioning the hull is quickly done.

The targeting process is manual and in average twice slower than tanks with turrets at the same tier or battle rating. However, the recoilless nature of the guns eliminates the need for retargeting between shots as the recoil is minimal. The short delay between shots eliminates the need for repositioning as it does not leave the target any time to retaliate.

An aspect to consider is the offset of the guns from the central target sight: at close range its impact is minimal but becomes noticeable when firing at specific weak spots on targets at a distance. Using the scouting MGs can help you assess the off-set but will reveal your position. Given the rifles layout of the Ontos, it is recommended to fire by salvos of 3 shells to guarantee a good balance between rate of fire and accuracy.

Like for a SPAA belt, you have to fire all 6 rifles before being allowed to start the reloading process. Your ammo capacity of 18 shells total (or 3 belts of 6) is limited, which will impact your combat performance as you're very likely to have to disengage in order to restock during a battle.

106 mm M40A1C Turret rotation speed (°/s) Reloading rate (seconds)
Mode Capacity Vertical Horizontal Stabilizer Stock Upgraded Full Expert Aced Stock Full Expert Aced
Arcade 18 -10°/+20° ±40° N/A 18.65 21.94 26.64 29.46 31.34 16.90 14.95 13.78 13.00
Realistic 10.71 12.60 15.30 16.92 18.00

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
M344A1 HEAT 433 433 433 433 433 433
M361A1 HESH 152 152 152 152 152 152
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%
M344A1 HEAT 502 10.0 N/A 0.5 1,650 65° 72° 77°
M361A1 HESH 498 10.0 0.4 0.1 5,040 73° 77° 80°

Ammo racks

Ammo racks of the M50
Full
ammo
1st
rack empty
2nd
rack empty
Visual
discrepancy
18 14 (+4) (+18) No

Six shells are loaded per reload. Individual tube reload is not possible.

Machine guns

12.7 mm M80
Mount Capacity
(Belt capacity)
Rate of fire
(shots/minute)
Vertical
guidance
Horizontal
guidance
Coaxial 120 (5) 300 N/A N/A
Coaxial 120 (5) 300 N/A N/A
Coaxial 120 (5) 300 N/A N/A
Coaxial 120 (5) 300 N/A N/A
7.62 mm M1919A4
Mount Capacity
(Belt capacity)
Rate of fire
(shots/minute)
Vertical
guidance
Horizontal
guidance
Pintle 1,000 (250) 500 -5°/+50° ±70°

Usage in battles

M50 Ontos at the National Museum of the Marine Corps

Obviously the M50 is not a main battle tank, with its thin armour even Reserve units are a threat! Stealth and guile is the tactic, using its high mobility and small size to get in ambush or outflank an enemy push fast. Memorize shooting spots, be it concealed ambush points or sheltered ranged locations overlooking active routes. The most important tactic is learn how to operate it! Keymap a separate trigger for the spotting gun and learn the firing sequence! Nothing worse than sight a perfect target, but the gun on the wrong side is fired into a rock! Also keep in mind the turret has only 80 degrees of traverse (+/- 40), a consideration during tactical manoeuvres. Still, compared to other ATG's this traverse is much wider, and also has a respectable -10 depression. Add that -10 degrees and angled position to the already extremely sloped front glacis armour and one could be bouncing large calibre AP rounds! Don't forgot to spot enemies too, make them feel the pressure, not you.

Modules

Tier Mobility Protection Firepower
I Tracks Parts Horizontal Drive
II Suspension Brake System FPE Adjustment of Fire Airstrike
III Filters Crew Replenishment Elevation Mechanism
IV Transmission Engine Improved optics

Pros and cons

Pros:

  • Six recoilless 106 mm rifles
  • The guns can be fired within 0.5 seconds of each other, allowing rapid fire on one helpless target
  • Stock shells of HEAT and HESH
  • The HEAT shell is really effective, literally point and shoot
  • Four heavy machine guns coaxial to guns - Can be used for spotting
  • 33 mph/53 kph nice speed, can get to ambush or sniping positions early game or rush capture point
  • Spotting Gun allow you to instantly adjust aim, improve accuracy
  • Quite effective in urban fighting since low-velocity shells do not matter in close quarter combat.

Cons:

  • No armour whatsoever (can be easily destroyed by heavy MG rounds or via air strafing)
  • Only 18 rounds - can't miss and be wasteful
  • Only 2 crew members - One shot is most likely to put you out of action
  • Spotting machine guns are hard to utilize, firing only in unison with the guns as default or separately with key bindings
  • Pintle mounted machine gun is quite ineffective against even aircraft found at this rank
  • Use of Spotting Gun and main gun needs practice to be proficient and successful.

History

It was such a strange "tank" the only word the US Army could think of for this strange thing was, well, "Thing", except someone was clever and used the Greek word, ὄντος (really, truly [exists]). Due to mountainous and difficult terrain of Korea brought the US Army revisited the idea of a light tank. It was quite an ingenious design made very quickly. The prototype was based on an M56 Scorpion ATG chassis, used a common truck engine, and mounted six very powerful M40A1C recoilless rifle guns and be light enough for air transport. The prototype was finished in 1952 and by 1955 completed its testing where it fulfilled its design requirements, but the Army simply did not like this monstrosity and decided against it. The US Marines on the other hand was not as picky and loved this highly mobile light tank with a huge punch, so ordered 297 in 1955. The design was reworked with a new chassis, new running gear with wide thread (ditching the M56 design), better internal layout, and other minor improvements that made the Ontos a unique one off design. While it had a few flaws, it was reliable enough to accomplish its mission.

The key to the M50’s offensive power is the 106mm M40A1C recoilless rifle firing devastating HEAT or HESH (later an anti-infantry "beehive") rounds with its integrated M8C .50 cal spotting rifle using a 10 or 20 round magazine. It should be noted the M8C is a shorter round (12.7x77mm, M48A2 Spotter-Tracer (S) bullets only) that the better known .50 AN/M2 BMG (12.7x99mm). Every M40 produced had the M8C, but on the M50 the lowest 2 barrels have this spotting rifle removed leaving an empty mounting post. If wanted (but not recommended) all 6 guns can be fired at once delivering far more destructive offensive load than any tank then or today. The nature of recoilless rifles is a powerful blow back, during a test firing all 6 simultaneously it knocked bricks out of a building and shattered a few car windows. In between is mounted a single pintel mounted .30 calibre M1919A4 machine gun for anti-infantry use.

The first combat use of the Ontos occurred in 1964 Dominican Republic Civil War where it reported destroyed an AMX-13 and an old Swedish L-60 (the only time it was used for purpose built, destroying tanks). But it was the following year when it was deployed to Vietnam did it shine.

Vietnam was extremely hostile to tanks not due to enemies but the environment. Jungle, swamp, rice fields, mountains, rivers, a limited road network with small bridges; it was a nightmare for regular tanks but the Ontos could glide over them with ease. Enemy Vietnamese troops rarely used tanks and few anti-tank guns so there was little threat from them, the paper thin armour was more than enough to resist small arms and heavy MG fire most often encountered. The significant vulnerability of reloading the 6 guns was largely moot as the fearsome reputation of this 6 shooter beast often cleared out enemy positions soon after it started shooting. Unfortunately its age was its greatest enemy. Over 10 years old and long out of production breakdowns became more frequent, some were cannibalized for parts and the turrets where mounted to fixed positions as point defence. Despite its unprecedented success in Vietnam its limited numbers, scattered deployment, breakdowns, and frequent rotation, it did not gain as much fame as it could have. More of footnote today, this unusual tank was the perfect vehicle for very difficult conflict.

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 series of the vehicles;
  • links to approximate analogues of other nations and research trees.

External links


USA tank destroyers
Early projects  M3 GMC · M8 HMC · M8A1
Based on M4  M10 GMC · M36 GMC
M18  M18 GMC · M18 "Black Cat" · Super Hellcat
T95  T28 · T95
China  ▃LVT(A)(4) ZIS-2
Post-war  M50 · M56 · T114 · M901 · ADATS