Difference between pages "Wellington Mk X" and "SAu 40"

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(Restored page from version archived 10-12-18.)
 
(History: Replaced history section with detailed one from WT devblog)
 
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{{Specs-Card|code=wellington_mk10}}
+
{{Specs-Card|code=fr_somua_sau40}}
{{Notice|''This page is about the aircraft '''{{PAGENAME}}'''. For other uses, see [[Wellington_(Disambiguation)|Wellington (Disambiguation)]]''}}
+
 
 
== Description ==
 
== Description ==
<!--''In the description, the first part needs to be about the history of and the creation and combat usage of the aircraft, as well as its key features. In the second part, tell the reader about the aircraft in the game. Insert a screenshot of the vehicle. If the novice player does not remember the vehicle by name, he 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}}''' (DE 75 mm Self-Propelled Gun SAu 40) is a Rank {{specs|rank}} French tank destroyer {{Battle-rating|1}}. It was introduced in [[Update 1.75 "La Résistance"]]. It distinguish itself by its very tall cupola and thick gun barrel. This tank is equipped with APHE rounds, a rare feature in the French tech tree.
 +
 
 +
As it was developped from the French [[S.35]], this tank shares many of its characteristics such as ~40 mm cast hull bolted onto the chassis, which is barely a widened version of its original. The track system is mostly the same as on the [[S.35]], with 25 mm plates covering the roller wheels. As for the hull, its two 8 mm ''grilles'' over the engine compartment and doors on the side reinforces the impression that it's just a widened [[S.35]] hull.
 +
 
 +
As this tank is based off the [[S.35]], it shares many of its attributes when it comes to armour. A slight angle can defeat most shots this tank will take at this BR, this is useful to know when getting into position: from a distance and not showing neither side nor front to the enemy, you should be safe. As for frontal armour, its 40 mm overall thickness is not strong enough to withstand anything bigger than AA fire. But, a thing to consider with this weird pattern is its "bouncy" behaviour,  principally around the gun mantlet: complex angles may just bounce some shots, making them loose some energy before hitting the main armour, this feature is peculiarly distinctive at gun's height.
 +
 
 +
The main weakness of this tank is its ''very tall'' commander's cupola, which makes it quite easy to spot and destroy, as it is thinner than the main armour. Any APHE penetrating this area will kill the tank's commander, thus disabling its only MG and some shrapnels may even damage or kill the driver, disabling this tank for good. A way to avoid getting spotted too easily is buying camouflage for the front cupola area, making it look more like a bush popping out a hill than a tank's turret. Try to hide the tank's lower hull part as it is only 35 mm thick.
 +
 
 +
While being mounted on a widened [[S.35]] hull, this heavier tank has about 70 HP less than its predecessor, making it quite slow and unwieldy. In order to fulfill the task of getting into position, one should choose its route wisely and avoid risky spots as this tank's ''awful'' reverse speed and hull turning rate makes it quite bad at hasty retreats. Mobility with the Somua 40 is an issue. It is arguably what makes this tank hard to master as it does not allow for good map placement.
 +
 
 +
As any casemate SPG, this tank's main feature is its main gun...kind of. With average penetration rates for this BR with a maximum of 73 mm at point-blank ranges (comparably, the Russian [[SU-76M]] penetrates 80 mm with its basic APHE shell and up to 135 mm with APCR shots). While being one of the rare French tank shooting APHE shells, increasing its one-shot potential, this round noticeably fails to explode when flanking enemies as this round takes 25 mm of steel to detonate. Another concern being its slow horizontal traverse, which makes it hard to react to fast-paced situations. This gun placement makes this tank quite vulnerable: being low, it exposes the SOMUA 40 to enemy fire when popping up a hill.
 +
 
 +
As for the turreted MAC 31 MG, it does not helps at anything more than taking down truck-mounted guns. This turret is slow, which negates the possibility of chasing planes with it. It also has poor rate of fire and is low calibre, so even if you manage to hit a plane, it will not do much to it.
  
[[File:GarageImage_{{PAGENAME}}.jpg|420px|thumb|left|The '''{{PAGENAME}}''' in the garage]]
 
{{break}}
 
The '''{{Specs|name}}''' is a Rank {{Specs|rank}} British bomber {{Battle-rating|3}}.  This aircraft has been in the game since the start of the Open Beta Test prior to Update 1.29.
 
 
== General info ==
 
== General info ==
=== Flight Performance ===
+
=== Survivability and armour ===
<!--''Describe how the aircraft behaves in the air. Maximum speed, manoeuvrability, speed and allowable loads - these are the most important characteristics of the vehicle.''-->
+
<!--''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 helpfull for survival in combat?''
 +
 
 +
''If necessary use a visual template to indicate the most secure and weak zones of the armour.''-->
 +
'''Armour type:'''
 +
 
 +
* Cast homogeneous armour
 +
 
 +
{| class="wikitable"
 +
|-
 +
! Armour !! Front (Slope angle) !! Sides !! Rear !! Roof
 +
|-
 +
| Hull || 40 mm (0-73°) ''Front glacis'' <br> 34 mm (1-54°) ''Lower glacis'' <br> 60 mm (0-53°) ''Gun mantlet'' || 40 mm (0-24°), 34 mm (43-63°) ''Top'' <br> 40 (1-3°) + 25 mm (0-89°) ''Bottom'' || 34 mm (20-49°) ''Top'' <br> 34 mm (4-71°) ''Bottom'' || 20 mm <br> 8 mm ''Engine grille''
 +
|-
 +
| Turret || 38 mm (5-48°) <br> 25 mm ''Gun mantlet'' || 38 mm (16-38°) || 38 mm (11-38°) || 20 mm <br> 34 mm ''Dome''
 +
|-
 +
|}
 +
'''Notes:'''
 +
 
 +
* Suspension wheels are 15 mm thick while tracks are 20 mm thick.
 +
* Turret underside is 20 mm thick.
 +
* Turret ring is 30 mm thick.
 +
* Turret base is 34 mm thick.
 +
 
 +
=== Mobility ===
 +
<!--''Write about the mobility of the ground vehicle. Estimate the specific power and maneuverability as well as the maximum speed forward and backward.''-->
 
{| class="wikitable" style="text-align:center"
 
{| class="wikitable" style="text-align:center"
 
|-
 
|-
! colspan="8" | Characteristics
+
! colspan="3" | Mobility characteristic
 
|-
 
|-
! colspan="8" | ''Stock''
+
! Weight (tons)
 +
! colspan="1" | Add-on Armour<br>weight (tons)
 +
! colspan="1" | Max speed (km/h)
 
|-
 
|-
! colspan="2" | Max Speed<br>(km/h at 4,053 m)
+
| rowspan="2" | 24.0 || colspan="1" rowspan="2" | N/A || colspan="1" | 40 (AB)  
! rowspan="2" | Max altitude<br>(meters)
 
! colspan="2" | Turn time<br>(seconds)
 
! colspan="2" | Rate of climb<br>(meters/second)
 
! rowspan="2" |Take-off run<br>(meters)
 
 
|-
 
|-
! AB
+
|37 (RB/SB)
! RB
 
! AB
 
! RB
 
! AB
 
! RB
 
 
|-
 
|-
|390||377|| {{Specs|ceiling}} ||36.7||37.5||3.2||3.2||650
+
! colspan="3" | Engine power (horsepower)
 
|-
 
|-
! colspan="8" | ''Upgraded''
+
! colspan="1" | Mode
 +
!Stock
 +
!Upgraded
 
|-
 
|-
! colspan="2" | Max Speed<br>(km/h at 4,053 m)
+
|''Arcade''
! rowspan="2" |Max altitude (meters)
+
|270
! colspan="2" | Turn time (seconds)
+
|___
! colspan="2" | Rate of climb<br>(meters/second)
 
! rowspan="2" |Take-off run (meters)
 
 
|-
 
|-
! AB
+
|''Realistic/Simulator''
! RB
+
|168
! AB
+
|190
! RB
 
! AB
 
! RB
 
 
|-
 
|-
| ? || ? || {{Specs|ceiling}} || ??.? || ??.? || ??.? || ??.? ||650
+
! colspan="3" | Power-to-weight ratio (hp/ton)
 
|-
 
|-
|}
+
! colspan="1" | Mode
 
+
!Stock
====Details====
+
!Upgraded
{| class="wikitable" style="text-align:center"
 
|-
 
! colspan="5" | Features
 
 
|-
 
|-
! Combat flap
+
|''Arcade''
! Take-off flap
+
|11.25
! Landing flap
+
|__.__
! Air brakes
 
! Arrestor gear
 
 
|-
 
|-
| || ✓ || ✓ || X || X    <!-- ✓ -->
+
|''Realistic/Simulator''
 +
|7.00
 +
|7.92
 
|-
 
|-
 
|}
 
|}
 +
 +
== Armaments ==
 +
=== 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 flexibilty 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|APX (75 mm)}}
  
 
{| class="wikitable" style="text-align:center"
 
{| class="wikitable" style="text-align:center"
 
|-
 
|-
! colspan="5" | Limits
+
! colspan="6" | [[APX (75 mm)|75 mm APX]]
 +
|-
 +
! colspan="3" rowspan="1" style="width:5em" |Capacity
 +
! rowspan="1" | Vertical <br> guidance
 +
! rowspan="1" | Horizontal <br> guidance
 +
! rowspan="1" | Stabilizer
 
|-
 
|-
! rowspan="2" | Wing-break speed<br>(km/h)
+
| colspan="3" | 102 || -10°/+30° || -7°/+7.6° || N/A
! rowspan="2" | Gear limit<br>(km/h)
 
! rowspan="2" | Combat flap<br> (km/h)
 
! colspan="2" | Max Static G
 
 
|-
 
|-
! +
+
! colspan="6" | Turret rotation speed (°/s)
! -
 
 
|-
 
|-
| {{Specs|разрушение|конструкции}} || {{Specs|разрушение|шасси}} || 280 || ~2 || ~1
+
! style="width:4em" |Mode
 +
! style="width:4em" |Stock
 +
! style="width:4em" |Upgraded
 +
! style="width:4em" |Prior + Full crew
 +
! style="width:4em" |Prior + Expert qualif.
 +
! style="width:4em" |Prior + Ace qualif.
 
|-
 
|-
|}
+
| ''Arcade'' || 3.6 || __.__ || __.__ || __.__ || __.__
 
+
|-
{| class="wikitable" style="text-align:center"
+
| ''Realistic'' || 3.6 || __.__ || __.__ || __.__ || __.__
 
|-
 
|-
! colspan="4" | Optimal velocities
+
! colspan="4" | Reloading rate (seconds)
 
|-
 
|-
! Ailerons<br>(km/h)
+
! colspan="1" style="width:4em" |Stock
! Rudder<br>(km/h)
+
! colspan="1" style="width:4em" |Prior + Full crew
! Elevators<br>(km/h)
+
! colspan="1" style="width:4em" |Prior + Expert qualif.
! Radiator<br>(km/h)
+
! colspan="1" style="width:4em" |Prior + Ace qualif.
 
|-
 
|-
| < 290 || < 290 || < 320 || > 180
+
| 7.2 || __.__ || __.__ || __.__
 
|-
 
|-
 
|}
 
|}
  
{| class="wikitable" style="text-align:center"
+
===== Ammunition =====
 +
{| class="wikitable sortable" style="text-align:center" width="100%"
 +
! colspan="8" | Penetration statistics
 
|-
 
|-
! colspan="3" | Compressor (RB/SB)
+
! rowspan="2" data-sort-type="text" | Ammunition
 +
! rowspan="2" class="unsortable" | Type of <br /> warhead
 +
! colspan="6" | '''Penetration''' '''''in mm''''' '''@ 90°'''
 
|-
 
|-
! colspan="3" | Setting 1
+
! 10m
 +
! 100m
 +
! 500m
 +
! 1000m
 +
! 1500m
 +
! 2000m
 
|-
 
|-
! Optimal altitude
+
| Mle1910M || APHE || 73 || 71 || 61 || 50 || 43 || 36
! 100% Engine power
 
! WEP Engine power
 
 
|-
 
|-
| 1,448 m || 2,800 hp || 3,094 hp
+
| Mle1917 || HE || 10 || 10 || 10 || 10 || 10 || 10
|-
+
|-  
! colspan="3" | Setting 2
+
|}
|-
+
{| class="wikitable sortable" style="text-align:center" width="100%"
! Optimal altitude
+
! colspan="11" | Shell details
! 100% Engine power
 
! WEP Engine power
 
 
|-
 
|-
| 4,014 m || 2,600 hp || 2,873 hp
+
! rowspan="2" data-sort-type="text" | Ammunition
 +
! rowspan="2" class="unsortable" | Type of <br /> warhead
 +
! rowspan="2" |Velocity <br /> in m/s
 +
! 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:''
 
|-
 
|-
<!--! colspan="3" | Setting 3
+
! 0%
 +
! 50%
 +
! 100%
 
|-
 
|-
! Optimal altitude
+
| Mle1910M || APHE || 570 || 6.4 || 1.2 || 25 || 90 || ° || 47° || 60° || 65°
! 100% Engine power
 
! WEP Engine power
 
 
|-
 
|-
| ?,??? m || ?,??? hp || ?,??? hp
+
| Mle1917 || HE || 577 || 6.1 || 0.4 || 0.1 || 675 || +0° || 79° || 80° || 81°
|- -->
+
|-  
 
|}
 
|}
  
=== Survivability and armour ===
+
===== [[Ammo racks|Ammo racks]] =====
<!--''Examine the survivability of the aircraft. Note how vulnerable the structure is and how secure the pilot is, whether the fuel tanks are armoured. Describe the armour, if there is any, also mention the vulnerability of other critical aircraft systems.''-->
+
[[File:Ammoracks {{PAGENAME}}.png|right|thumbnail|x250px|[[Ammo racks|Ammo racks]] of the {{PAGENAME}}.]]
 
+
{| class="wikitable sortable" style="text-align:center"
* 9 mm Steel plate in the pilot's seat.
 
* No armour glazing
 
* Critical components located in the wings of aircraft (fuel, engine, controls)
 
 
 
== Armaments ==
 
<!--=== Offensive armament ===
 
''Describe the offensive armament of the aircraft, if any. Describe how effective the cannons and machine guns are in a battle, and also what belts or drums are better to use. If there is no offensive weaponry, delete this subsection.''
 
{{main|MAC 1934 (7.5 mm)}}
 
 
 
The '''''{{PAGENAME}}''''' is armed with:
 
 
 
* 4 x 7.5 mm [[MAC 1934 (7.5 mm)|MAC 1934]] machine guns (300 rpg = 1,200 total)
 
-->
 
=== Suspended armament ===
 
<!--''Describe the aircraft's suspended armament: additional cannons under the wings, bombs, rockets and torpedoes. This section is especially important for bombers and attackers. If there is no suspended weaponry remove this subsection.''-->
 
{{main|:Category:Suspended armaments|l1=Suspended armaments}}
 
 
 
The '''''{{PAGENAME}}''''' can be outfitted with the following ordinance"
 
 
 
* 10 x G.P. 250 lb Mk.IV bombs
 
* 18 x G.P. 250 lb Mk.IV bombs
 
* 9 x G.P. 500 lb Mk.IV bombs
 
* 6 x G.P. 250 lb Mk.IV bombs + 2 x 1,000 lb AN-M65A1 bombs
 
* 2 x 18 inch Mark XII torpedoes
 
* 1 x H.C. 4,000 lb Mk.II bomb
 
 
 
=== Defensive armament ===
 
<!--''Defensive armament with turret machine guns or cannons, crewed by gunners. Examine the number of gunners and what belts or drums are better to use. If defensive weaponry is not available remove this subsection.''-->
 
 
 
{{main|Browning .303 (7.7 mm)|Vickers K (7.7 mm)}}
 
 
 
The '''''{{PAGENAME}}''''' is defended by:
 
 
 
* 2 x 7.7 mm Browning machine gun, nose turret (1,200 RPG = 2,400 total)
 
* 2 x 7.7 mm Browning machine gun, tail turret (2,000 RPG = 4,000 total)
 
* 1 x 7.7 mm Vickers K machine gun, 2 x beam turret (2,500 RPG = 5,000 total)
 
 
 
== Usage in the battles ==
 
<!--''Describe the tactics of playing in an aircraft, the features of using vehicles in a team and advice on tactics. Refrain from creating a "guide" - do not impose a single point of view but give the reader food for thought. Examine the most dangerous enemies and give recommendations on fighting them. If necessary, note the specifics of the game in different modes (AB, RB, SB).''-->
 
====Tactics====
 
In AB the winning tactic is to climb high and do base bombing with 500’s “from orbit”; it helps to have escorts.
 
 
 
In RB you air start so you have the advantage to trade altitude for airspeed and bomb ground targets and retreat before ground starting enemy fighters arrive, however be close to friendlies to intercept chasers.
 
 
 
====Counter-tactics====
 
If you are attack a Wellington, focus on engines, they are relatively easy to start on fire. While you should not worry too much about the turret, do not hang around either, and dead six attack is still dangerous as the rain of 7.7 may cause an engine fire. As usual expect chance to not be allied with you.
 
 
 
===Manual Engine Control===
 
{| class="wikitable" style="text-align:center"
 
|-
 
! colspan="7" | MEC elements
 
 
|-
 
|-
! rowspan="2" |Mixer
+
! class="wikitable unsortable" |Full<br /> ammo
! rowspan="2" |Pitch
+
! class="wikitable unsortable" |1st<br />  rack empty
! colspan="3" |Radiator
+
! class="wikitable unsortable" |2nd<br />  rack empty
! rowspan="2" |Supercharger
+
! class="wikitable unsortable" |3rd<br />  rack empty
! rowspan="2" |Turbocharger
+
! class="wikitable unsortable" |4th<br />  rack empty
 +
! class="wikitable unsortable" |5th<br />  rack empty
 +
! class="wikitable unsortable" width="10%" |Recommendations
 +
! class="wikitable unsortable" |Visual<br /> discrepancy
 
|-
 
|-
! Oil
+
|| '''102''' || 84&nbsp;''(+18)'' || 66&nbsp;''(+36)'' || 42&nbsp;''(+60)'' || 18&nbsp;''(+84)'' || 1&nbsp;''(+83)'' || style="text-align:left" | Floor only: 18&nbsp;(+83) || style="text-align:left" | no
! Water
 
! Type
 
|-
 
| Not Controllable || rowspan="2" | Controllable || rowspan="2" | Not controllable || rowspan="2" | Controllable || rowspan="2" | Combined || rowspan="2" | Controllable || rowspan="2" | Not controllable
 
 
|-
 
|-
 
|}
 
|}
  
===Modules===
+
=== Machine guns ===
{| class="wikitable"
+
<!--''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.''-->
! colspan="1" | Tier
+
{{main|MAC 31 (7.5 mm)}}
! colspan="2" | Flight performance
+
 
! colspan="1" | Survivability
+
{| class="wikitable" style="text-align:center"
! colspan="2" | Weaponry
 
 
|-
 
|-
| I
+
! colspan="7" | [[MAC 31 (7.5 mm)|7.5 mm MAC 31]]
| Fuselage Repair
 
| Radiator
 
|
 
|  
 
 
|-
 
|-
| II
+
! colspan="7" | ''Cupola mount''
|
 
| Compressor
 
| Airframe
 
|
 
 
|-
 
|-
| III
+
! colspan="4" rowspan="1" style="width:5em" |Capacity (Belt capacity)
| Wings Repair
+
! rowspan="1" | Fire rate <br> (shots/minute)
| Engine
+
! rowspan="1" | Vertical <br> guidance
|  
+
! rowspan="1" | Horizontal <br> guidance
|  
 
 
|-
 
|-
| IV
+
| colspan="4" | 3,250 (150) || 1,350 || -9°/+20° || N/A
|  
 
| Engine Injection
 
| Cover
 
|  
 
 
|-
 
|-
 
|}
 
|}
The default bomb load is a meagre 10x 250lb (117 kg) so upgrading to 18x 250 or 9x 500 “pounders” (500lb (226 kg) should be task number one. in order: Unlock the Turret 7mm ammo first, then the TC mk.I (torpedo) rack, and then the LBC mk.I. Unlocking the 7mm ammo access “Universal” AP-I load as one works up to the bomb rack for 18x 250 or 9x 500. After that you can pursue your choice of upgrades.
 
  
Upgrades to the turret should also be considered. The different belts do not have a considerable effect, but the upgraded turrets allow for a longer rate of fire. Very important for the small rifle calibre machine guns.
+
== Usage in the battles ==
 +
<!--''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 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 Somua 40 behaves as a classical casemate SPG as it should provide its teammates with superior firepower from medium to far distance, behind the frontlines where it will be harder to flank. As this is its purposed role, this tank has some issues accomplishing it. The first being its relatively low penetration and shell velocity, which makes long range engagements (>750 m)a bit hard to manage. The second being bad mobility, which complicates the task of positioning.
  
However, speed and climb rate is also a necessity and the unlocks help the sluggish Wellington a lot. The decision should depend on the pilots flying style. When rushing in better armament will help in the retreat, but the better performance will aid even more to get to friendly zones.
+
Act as a classical SPG while keeping in mind your slow pace. There is nothing very much interesting nor special you can do with this tank.
  
The sneaky approach on the other hand relies less on speed, but on surviving the random combat encounters. Turret upgrades are here the way to go.
+
=== 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. Do not 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".''-->
 +
'''Pros:'''
  
=== Pros and cons ===
+
* Firepower
<!--''Summarise and briefly evaluate the vehicle regarding its characteristics and combat effectiveness. Mark its pros and cons in the bulleted list. Do not 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".''-->
 
  
'''Pros:'''
+
:* Decent 75mm cannon with explosive filler gives it good one-shot potential.
 +
:* "Terrific" MAC 31 gun mounted in cupola.
 +
:* Competitive reload time
 +
:* Good HE shells for dealing with SPAAs at the BR.
 +
:* Depression and elevation angles are acceptable.
  
* Versatile payload options.
+
* Armour is quite thick on all sides.
* Air-frame itself is very durable.
+
* Gun mantlet area is strong
* Usable payload stock, and fairly average once upgraded.
 
* Extreme horizontal firing arc on front and rear turret of just over 180 degrees.
 
* Good gunner ammunition supply.
 
  
 
'''Cons:'''
 
'''Cons:'''
  
* Hopelessly outclassed by enemy fighters of similar rank.
+
* Commander's cupola is badly designed.
* Defensive turrets are easy to take out.
+
 
* Defensive armament is poor.
+
:* Tall commander’s cupola.
* Slow speed.
+
:* Turret-mounted 7.5 mm MG does not allow for shooting down planes.
* Bad climb rate, largly do to combination of heavy airframe with only average engines.
+
:* Weak, unslopped armour makes it a shot trap
* Lack of armor makes engines, crew, fuel tanks, etc noticeably vulnerable.
+
:* Makes it easy to spot while bringing no tactical advantage.
* Control stiffening becomes a serious issue at air speeds over 450 km/h.
+
 
 +
* Slow in all domains.
 +
 
 +
:* Engine is underpowered
 +
:* Turret is slow
 +
:* Guns feels "lazy"
 +
 
 +
* Rather weak frontal armour due to bad sloping
 +
* Three crew members can quickly lead to combat efficiency loss.
 +
* Huge ammo rack near gunner makes it easy to one-shot.
  
 
== History ==
 
== History ==
<!-- Describe the history of the creation and combat usage of the aircraft 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 an article about the vehicle and adding a block "/ historical reference" (example: https://wiki.warthunder.com/Name-vehicles/historical reference) and add a link to it here using the main template. Be sure to include links to sources at the end of the article. -->
+
<!--''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 an article about the vehicle and adding a block "/historical reference" (example: https://wiki.warthunder.com/Name-vehicles/historical reference) and add a link to it here using the <code>main</code> template. Be sure to include links to sources at the end of the article.''-->
Performance wise the Wellington was not notably remarkable, its strength lay on the inside. Devised by one of the greatest innovative thinkers in history, Sir Barnes Neville Wallis devised a geodesic (geodetic) structure resulting in an exceptionally strong airframe. Together with Reginald Kirshaw "Rex" Pierson they designed their record making “Vickers Wellesley” opening the way for the “Wellington” and larger “Warwick”. With high aspect ratio wing and spacious fuselage it proved capable of handling a myriad of missions including early airborne radar and robust enough enough to absorb severe damage and fly home. Although the bomb bay configuration limited bomb size its payload was slightly more than the Heinkel He-111H-3 and with greater range. It is also one of the first aircraft to have a powered turret in the extreme tail with a very wide arc; however it still was inadequate to defend itself against attacking fighters and early models lacked self sealing fuel tanks. Still, this aircraft was admired by crews and affectionately called “Wimpy” after Popeye’s hamburger loving friend and sidekick who's full name is J. Wellington Wimpy. Over 11,000 made it equipped many RAF squadrons including those comprised of foreign crews like the Polish (4 squadrons), New Zealand (No. 75), and Czech (No, 311) one of which was captured by Germans who used it for intelligence and training. “Viking”, a passenger transport variant, became the world's first pure jet transport prototype aircraft in 1948.
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The SAu 40 self-propelled gun was developed by the SOMUA company between 1935 and 1937 as part of the same order the French cavalry placed for the S35 tank.  
 +
 
 +
The two tanks combined were intended to equip light mechanized divisions of the French army and support the larger “battle tanks” (chars de bataille). The vehicle inherited the S35’s characteristic chassis with a redesigned front section of the hull to accommodate the 75mm APX cannon. In addition, the rotating turret on top of the fighting compartment was redesigned to a commander’s cupola and moved to the side of the vehicle, but the turret’s 47mm cannon was replaced with a single 7.5mm machine gun.  
 +
 
 +
The body of the SAu 40 was ready by 1937, but it couldn’t be immediately completed. Because the cannon was not yet ready to be installed on the chassis, SOMUA engineers had to wait nearly 2 years before the cannon was finally made available. It wasn’t until 1939 that the fully assembled prototype was completed, and orders for mass production were received in October of the same year.  
 +
 
 +
Whether or not any additional vehicles other than the prototype were built or if the vehicle took part in active fighting is unknown.
 +
 
 +
''-Excerpt from [https://warthunder.com/en/news/5169-development-sau-40-the-ugly-duckling-en Devblog]''
  
 
== Media ==
 
== Media ==
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== Read also ==
 
== Read 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 aircraft;''
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* [https://warthunder.com/en/news/5169-development-sau-40-the-ugly-duckling-en [Devblog<nowiki>]</nowiki> SAu 40 - The Ugly Duckling]
* ''links to approximate analogues of other nations and research trees.''
 
<!--''ETC.''-->
 
  
 
== Sources ==
 
== Sources ==
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* ''topic on the official game forum;''
 
* ''topic on the official game forum;''
* ''page on aircraft encyclopedia;''
 
 
* ''other literature.''
 
* ''other literature.''
  
{{Britain bombers}}
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{{France tank destroyers}}

Revision as of 02:44, 13 February 2019

Canon Automoteur DE 75 mm SAu 40
fr_somua_sau40.png
AB
RB
SB
General characteristics
Brief
Detailed
2.0/2.0/2.0BR
3 peopleCrew
Mobility
24.0 tWeight
5 forward
1 back
Gear box
Armament
75 mm APX cannonWeapon 1
101 roundsAmmunition
-10° / 30°Vertical guidance
-7° / 7.5999999046326°Horizontal guidance
7.5 mm MAC 31 machine gunWeapon 2
3 250 roundsAmmunition
150 roundsBelt capacity
1 350 shots/minFire rate
Economy
7 900 Rp icon.pngResearch
10 000 Sl icon.pngPurchase
Sl icon.png710 / 886/600 / 748/510 / 636Repair
3 000 Sl icon.pngCrew training
10 000 Sl icon.pngExperts
110 Ge icon.pngAces
x 1.12 Rp icon.pngReward for battle

Description

GarageImage SAu 40.jpg


The Canon Automoteur DE 75 mm SAu 40 (DE 75 mm Self-Propelled Gun SAu 40) is a Rank II French tank destroyer with a battle rating of 2.0 (AB/RB/SB). It was introduced in Update 1.75 "La Résistance". It distinguish itself by its very tall cupola and thick gun barrel. This tank is equipped with APHE rounds, a rare feature in the French tech tree.

As it was developped from the French S.35, this tank shares many of its characteristics such as ~40 mm cast hull bolted onto the chassis, which is barely a widened version of its original. The track system is mostly the same as on the S.35, with 25 mm plates covering the roller wheels. As for the hull, its two 8 mm grilles over the engine compartment and doors on the side reinforces the impression that it's just a widened S.35 hull.

As this tank is based off the S.35, it shares many of its attributes when it comes to armour. A slight angle can defeat most shots this tank will take at this BR, this is useful to know when getting into position: from a distance and not showing neither side nor front to the enemy, you should be safe. As for frontal armour, its 40 mm overall thickness is not strong enough to withstand anything bigger than AA fire. But, a thing to consider with this weird pattern is its "bouncy" behaviour, principally around the gun mantlet: complex angles may just bounce some shots, making them loose some energy before hitting the main armour, this feature is peculiarly distinctive at gun's height.

The main weakness of this tank is its very tall commander's cupola, which makes it quite easy to spot and destroy, as it is thinner than the main armour. Any APHE penetrating this area will kill the tank's commander, thus disabling its only MG and some shrapnels may even damage or kill the driver, disabling this tank for good. A way to avoid getting spotted too easily is buying camouflage for the front cupola area, making it look more like a bush popping out a hill than a tank's turret. Try to hide the tank's lower hull part as it is only 35 mm thick.

While being mounted on a widened S.35 hull, this heavier tank has about 70 HP less than its predecessor, making it quite slow and unwieldy. In order to fulfill the task of getting into position, one should choose its route wisely and avoid risky spots as this tank's awful reverse speed and hull turning rate makes it quite bad at hasty retreats. Mobility with the Somua 40 is an issue. It is arguably what makes this tank hard to master as it does not allow for good map placement.

As any casemate SPG, this tank's main feature is its main gun...kind of. With average penetration rates for this BR with a maximum of 73 mm at point-blank ranges (comparably, the Russian SU-76M penetrates 80 mm with its basic APHE shell and up to 135 mm with APCR shots). While being one of the rare French tank shooting APHE shells, increasing its one-shot potential, this round noticeably fails to explode when flanking enemies as this round takes 25 mm of steel to detonate. Another concern being its slow horizontal traverse, which makes it hard to react to fast-paced situations. This gun placement makes this tank quite vulnerable: being low, it exposes the SOMUA 40 to enemy fire when popping up a hill.

As for the turreted MAC 31 MG, it does not helps at anything more than taking down truck-mounted guns. This turret is slow, which negates the possibility of chasing planes with it. It also has poor rate of fire and is low calibre, so even if you manage to hit a plane, it will not do much to it.

General info

Survivability and armour

Armour type:

  • Cast homogeneous armour
Armour Front (Slope angle) Sides Rear Roof
Hull 40 mm (0-73°) Front glacis
34 mm (1-54°) Lower glacis
60 mm (0-53°) Gun mantlet
40 mm (0-24°), 34 mm (43-63°) Top
40 (1-3°) + 25 mm (0-89°) Bottom
34 mm (20-49°) Top
34 mm (4-71°) Bottom
20 mm
8 mm Engine grille
Turret 38 mm (5-48°)
25 mm Gun mantlet
38 mm (16-38°) 38 mm (11-38°) 20 mm
34 mm Dome

Notes:

  • Suspension wheels are 15 mm thick while tracks are 20 mm thick.
  • Turret underside is 20 mm thick.
  • Turret ring is 30 mm thick.
  • Turret base is 34 mm thick.

Mobility

Mobility characteristic
Weight (tons) Add-on Armour
weight (tons)
Max speed (km/h)
24.0 N/A 40 (AB)
37 (RB/SB)
Engine power (horsepower)
Mode Stock Upgraded
Arcade 270 ___
Realistic/Simulator 168 190
Power-to-weight ratio (hp/ton)
Mode Stock Upgraded
Arcade 11.25 __.__
Realistic/Simulator 7.00 7.92

Armaments

Main armament

Main article: APX (75 mm)
75 mm APX
Capacity Vertical
guidance
Horizontal
guidance
Stabilizer
102 -10°/+30° -7°/+7.6° N/A
Turret rotation speed (°/s)
Mode Stock Upgraded Prior + Full crew Prior + Expert qualif. Prior + Ace qualif.
Arcade 3.6 __.__ __.__ __.__ __.__
Realistic 3.6 __.__ __.__ __.__ __.__
Reloading rate (seconds)
Stock Prior + Full crew Prior + Expert qualif. Prior + Ace qualif.
7.2 __.__ __.__ __.__
Ammunition
Penetration statistics
Ammunition Type of
warhead
Penetration in mm @ 90°
10m 100m 500m 1000m 1500m 2000m
Mle1910M APHE 73 71 61 50 43 36
Mle1917 HE 10 10 10 10 10 10
Shell details
Ammunition Type of
warhead
Velocity
in m/s
Projectile
Mass in kg
Fuse delay

in m:

Fuse sensitivity

in mm:

Explosive Mass in g
(TNT equivalent):
Normalization At 30°
from horizontal:
Ricochet:
0% 50% 100%
Mle1910M APHE 570 6.4 1.2 25 90 ° 47° 60° 65°
Mle1917 HE 577 6.1 0.4 0.1 675 +0° 79° 80° 81°
Ammo racks
Ammo racks of the SAu 40.
Full
ammo
1st
rack empty
2nd
rack empty
3rd
rack empty
4th
rack empty
5th
rack empty
Recommendations Visual
discrepancy
102 84 (+18) 66 (+36) 42 (+60) 18 (+84) (+83) Floor only: 18 (+83) no

Machine guns

Main article: MAC 31 (7.5 mm)
7.5 mm MAC 31
Cupola mount
Capacity (Belt capacity) Fire rate
(shots/minute)
Vertical
guidance
Horizontal
guidance
3,250 (150) 1,350 -9°/+20° N/A

Usage in the battles

The Somua 40 behaves as a classical casemate SPG as it should provide its teammates with superior firepower from medium to far distance, behind the frontlines where it will be harder to flank. As this is its purposed role, this tank has some issues accomplishing it. The first being its relatively low penetration and shell velocity, which makes long range engagements (>750 m)a bit hard to manage. The second being bad mobility, which complicates the task of positioning.

Act as a classical SPG while keeping in mind your slow pace. There is nothing very much interesting nor special you can do with this tank.

Pros and cons

Pros:

  • Firepower
  • Decent 75mm cannon with explosive filler gives it good one-shot potential.
  • "Terrific" MAC 31 gun mounted in cupola.
  • Competitive reload time
  • Good HE shells for dealing with SPAAs at the BR.
  • Depression and elevation angles are acceptable.
  • Armour is quite thick on all sides.
  • Gun mantlet area is strong

Cons:

  • Commander's cupola is badly designed.
  • Tall commander’s cupola.
  • Turret-mounted 7.5 mm MG does not allow for shooting down planes.
  • Weak, unslopped armour makes it a shot trap
  • Makes it easy to spot while bringing no tactical advantage.
  • Slow in all domains.
  • Engine is underpowered
  • Turret is slow
  • Guns feels "lazy"
  • Rather weak frontal armour due to bad sloping
  • Three crew members can quickly lead to combat efficiency loss.
  • Huge ammo rack near gunner makes it easy to one-shot.

History

The SAu 40 self-propelled gun was developed by the SOMUA company between 1935 and 1937 as part of the same order the French cavalry placed for the S35 tank.

The two tanks combined were intended to equip light mechanized divisions of the French army and support the larger “battle tanks” (chars de bataille). The vehicle inherited the S35’s characteristic chassis with a redesigned front section of the hull to accommodate the 75mm APX cannon. In addition, the rotating turret on top of the fighting compartment was redesigned to a commander’s cupola and moved to the side of the vehicle, but the turret’s 47mm cannon was replaced with a single 7.5mm machine gun.

The body of the SAu 40 was ready by 1937, but it couldn’t be immediately completed. Because the cannon was not yet ready to be installed on the chassis, SOMUA engineers had to wait nearly 2 years before the cannon was finally made available. It wasn’t until 1939 that the fully assembled prototype was completed, and orders for mass production were received in October of the same year.

Whether or not any additional vehicles other than the prototype were built or if the vehicle took part in active fighting is unknown.

-Excerpt from Devblog

Media

An excellent addition to the article will be video guides, as well as screenshots from the game and photos.

Read also

Sources

Paste links to sources and external resources, such as:

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


France tank destroyers
  AMR.35 ZT3 · SAu 40 · ARL-44 · CA Lorraine · Lorraine 155 Mle.50 · AMX-50 Foch
USA  ▄3-inch Gun Motor Carriage M10