ST-A2

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RANK 4 FRANCE
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This page is about the Japanese medium tank ST-A2. For other variants, see Type 61 (Family).
ST-A2
jp_st_a2.png
GarageImage ST-A2.jpg
ArtImage ST-A2.jpg
ST-A2
AB RB SB
6.3 6.3 6.3
Class:
Research:71 000 Specs-Card-Exp.png
Purchase:210 000 Specs-Card-Lion.png
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Description

The ST-A2 is a rank IV Japanese medium tank with a battle rating of 6.3 (AB/RB/SB). It was introduced along with the initial Japanese Ground Forces tree in Update 1.65 "Way of the Samurai".

It is a sidegrade to ST-A1, which takes sniping duty as its main work while neglecting most of the other roles. One can literally treat them as the same tank, but they have some minor quality of life differences, which will be mentioned here.

General info

Survivability and armour

Armourfront / side / back
Hull45 / 35 / 20
Turret75 / 60 / 35
Crew4 people
Visibility96 %

Armour type:

  • Rolled homogeneous armour (hull, turret hatches)
  • Cast homogeneous armour (turret, cupola, front roof section)
Armour Front (Slope angle) Sides Rear Roof
Hull 45 mm (62°) Upper glacis
50 mm (54°) Lower glacis
30 mm (57°) Track overhang
30 mm (42°) Top
35 mm Bottom
10 mm (43°) Top
20 mm (21°) Bottom
20 mm (2°) Track overhang
30 mm (15°) Front roof section
12 mm
5 mm Engine vents
Turret 75 mm (spherical) Turret front
35-75 mm (spherical) Gun mantlet
35 mm (54°) Roof glacis
60 mm Turret ring
60 mm (spherical) Front
35 mm (spherical) Front
60 mm Turret ring
35 mm (3°)
25 mm (19-90°) Turret overhang
18 mm (0-8°)
Cupola 35 mm (cylindrical) Commander cupola - top
60 mm (cylindrical) Commander cupola - base
35 mm (cylindrical) Loader cupola
18 mm (2°)

Notes:

  • Suspension wheels and tracks are 20 mm thick.

Armour on the ST-A2 is about the same as ST-A1, but there are some differences to its weaknesses.

For instance, the hull is now raised to engine deck level and slope goes all the way up the turret, resulting in turret being well above engine deck. The frontal armour is even more angled now, with effective thickness of about 90-100 mm, but it now also connected to engine deck, and in connection spot it's about 80 mm effective thickness like before. Most of tanks can still penetrate entire armour with no issues, so overall on tank's own BR it changes only rear gun depression and ability of certain tanks to just explode the tank with HE when it's hulldown.

Since hull is raised higher, there is less chances that enemy APHE will hit driver optics on accident or will be stopped by transmission and won't destroy the tank. Also, gunner's head is now above gun breech, so random shrapnel has a chance of hitting him, if enemy shell explodes above it, resulting in complete crew knockout, unlike with ST-A1.

For the turret, the commander cupolas was raised a bit and the pintle-mounted machine gun was removed. Overall it makes it harder to destroy tank with HE, but nothing more. However, the turret neck is no longer a weak spot for SPAA to exploit, but tank can still be destroyed by SPAA firing at MG port because their shells still cause spalling or explode and hit ammo rack despite it being rotated away from the weak spot. Still, it will definitely take them longer to deal with the tank that way.

Ammo rack in back of the turret is now facing turret and is much narrower a target, so the gun breech shields it entirely. Because of that, as long as the ST-A2 fires off first two rounds in first-stage rack, the chances of tank exploding due to ammo rack being hit through the turret is reduced. It came at a price, though, as it is now even easier to shoot the tank from the side or back. The block outside of turret's back isn't even modeled, so if HESH hits back of the turret, it's going to explode the entire tank.

Mobility

Speedforward / back
AB50 / 20 km/h
RB and SB45 / 18 km/h
Number of gears7 forward
2 back
Weight34.0 t
Engine power
AB954 hp
RB and SB500 hp
Power-to-weight ratio
AB28.1 hp/t
RB and SB14.7 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 50 20 34 775 954 22.79 28.06
Realistic 45 18 442 500 13 14.71

The mobility of the ST-A2 is the same as predecessor, as well as their effective off-road and top speed - about (AB/RB) 40/33 km/h forward and -18/-15 km/h backwards off-road, with top speed being 50/45 forward and -20/-17 backwards .

Modifications and economy

Repair costBasic → Reference
AB4 030 → 5 186 Sl icon.png
RB4 030 → 5 186 Sl icon.png
SB3 900 → 5 019 Sl icon.png
Total cost of modifications61 600 Rp icon.png
102 500 Sl icon.png
Talisman cost1 800 Ge icon.png
Crew training61 000 Sl icon.png
Experts210 000 Sl icon.png
Aces890 Ge icon.png
Research Aces570 000 Rp icon.png
Reward for battleAB / RB / SB
110 / 170 / 210 % Sl icon.png
178 / 178 / 178 % Rp icon.png
Modifications
Mobility Protection Firepower
Mods new tank traks.png
Tracks
Research:
3 100 Rp icon.png
Cost:
5 200 Sl icon.png
180 Ge icon.png
Mods new tank suspension.png
Suspension
Research:
2 800 Rp icon.png
Cost:
4 700 Sl icon.png
160 Ge icon.png
Mods new tank break.png
Brake System
Research:
2 800 Rp icon.png
Cost:
4 700 Sl icon.png
160 Ge icon.png
Mods new tank filter.png
Filters
Research:
3 800 Rp icon.png
Cost:
6 300 Sl icon.png
220 Ge icon.png
Mods new tank transmission.png
Transmission
Research:
4 000 Rp icon.png
Cost:
6 600 Sl icon.png
230 Ge icon.png
Mods new tank engine.png
Engine
Research:
4 000 Rp icon.png
Cost:
6 600 Sl icon.png
230 Ge icon.png
Mods tank tool kit.png
Parts
Research:
3 100 Rp icon.png
Cost:
5 200 Sl icon.png
180 Ge icon.png
Mods extinguisher.png
FPE
Research:
2 800 Rp icon.png
Cost:
4 700 Sl icon.png
160 Ge icon.png
Mods tank reinforcement jp.png
Crew Replenishment
Research:
3 800 Rp icon.png
Cost:
6 300 Sl icon.png
220 Ge icon.png
Mods tank ammo.png
90mm_us_M82_APCBC_ammo_pack
Research:
3 100 Rp icon.png
Cost:
5 200 Sl icon.png
180 Ge icon.png
Mod arrow 0.png
Mods new tank horizontal aiming.png
Horizontal Drive
Research:
3 100 Rp icon.png
Cost:
5 200 Sl icon.png
180 Ge icon.png
Mods tank ammo.png
90mm_us_M304_APCR_ammo_pack
Research:
2 800 Rp icon.png
Cost:
4 700 Sl icon.png
160 Ge icon.png
Mod arrow 0.png
Mods tank cannon.png
Adjustment of Fire
Research:
2 800 Rp icon.png
Cost:
4 700 Sl icon.png
160 Ge icon.png
Mods tank ammo.png
90mm_us_M332_APCR_ammo_pack
Research:
3 800 Rp icon.png
Cost:
6 300 Sl icon.png
220 Ge icon.png
Mod arrow 0.png
Mods new tank vertical aiming.png
Elevation Mechanism
Research:
3 800 Rp icon.png
Cost:
6 300 Sl icon.png
220 Ge icon.png
Mods tank ammo.png
90mm_us_T108_HEAT_ammo_pack
Research:
4 000 Rp icon.png
Cost:
6 600 Sl icon.png
230 Ge icon.png
Mods art support.png
Artillery Support
Research:
4 000 Rp icon.png
Cost:
6 600 Sl icon.png
230 Ge icon.png
Mods tank ammo.png
90mm_us_M313_Smoke_ammo_pack
Research:
4 000 Rp icon.png
Cost:
6 600 Sl icon.png
230 Ge icon.png

Armaments

Main armament

Ammunition40 rounds
First-order11 rounds
Reloadbasic crew → aces
9.7 → 7.5 s
Vertical guidance-10° / 13°
Main article: M3A1 (90 mm)

The gun and the ammunition themselves are the same as the ones on ST-A1.

As with ST-A1, one must unlock APHE as the very first module and then try to get aim adjustment as soon as possible, leveling it same way as the predecessor, as otherwise it is very hard to defeat opposing tanks and earn research points on this tank.

Due to turret being elevated above engine deck, the gun can now depress enough to fire at tanks behind it, no matter how low their profile is, as long as they stay on even ground.

90 mm M3A1 Turret rotation speed (°/s) Reloading rate (seconds)
Mode Capacity Vertical Horizontal Stabilizer Stock Upgraded Full Expert Aced Stock Full Expert Aced
Arcade 40 -10°/+13° ±180° N/A 22.85 31.62 38.40 42.47 45.18 9.75 8.63 7.95 7.50
Realistic 14.28 16.80 20.40 22.56 24.00

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
M318 shot APBC 175 173 161 147 135 123
M82 shot APCBC 185 182 170 155 142 130
M304 shot APCR 287 281 259 234 211 191
M332 shot APCR 291 286 264 240 217 197
M348 shell HEATFS 305 305 305 305 305 305
M71 shell HE 13 13 13 13 13 13
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%
M318 shot APBC 853 10.98 N/A N/A N/A 47° 60° 65°
M82 shot APCBC 853 10.94 1.2 14 137.2 48° 63° 71°
M304 shot APCR 1,021 7.62 N/A N/A N/A 66° 70° 72°
M332 shot APCR 1,165 5.7 N/A N/A N/A 66° 70° 72°
M348 shell HEATFS 853 6.5 0.05 0.1 926.17 65° 72° 77°
M71 shell HE 823 10.55 0 0.1 925 79° 80° 81°
Smoke shell characteristics
Ammunition Velocity
(m/s)
Projectile
Mass (kg)
Screen radius
(m)
Screen deploy time
(s)
Screen hold time
(s)
Explosive Mass
(TNT equivalent) (g)
M313 821 10.7 13 5 20 50

Ammo racks

Ammo racks of the ST-A2
Full
ammo
1st
rack empty
2nd
rack empty
3rd
rack empty
Visual
discrepancy
40 12 (+28) 10 (+30) (+39) No

Notes:

  • Shells are modeled individually and disappear after having been shot or loaded.
  • Racks 2* and 3* are first stage ammo racks. They total 11 shells.
  • These racks get filled first when loading up the tank and are also emptied first.
  • The depletion order at full capacity is: 2 - 3 - 1.
  • Rack 1 depletes from rear to front.

Optics

ST-A2 Optics
Which ones Default magnification Maximum magnification
Main Gun optics x8 x16
Comparable optics JPz 4-5

ST-A2 optics are identical to ST-A1. As usual, the user should exploit the superior magnification to target out enemy weaknesses or to snipe unsuspecting opponents from afar.

Machine guns

Ammunition4 500 rounds
Belt capacity250 rounds
Reloadbasic crew → aces
10.4 → 8.0 s
Fire rate500 shots/min
Main article: M1919A4 (7.62 mm)

The 12.7 mm M2HB machine gun was removed, so ST-A2 only has 7.62 mm M1919A4 in its turret. It still can be used to damage open-top SPG, but fighting light tanks with it is not possible. Planes are also harder to engage with it.

On other hand, its trajectory is similiar to APHE shell up to 760 m, so you can use it to check your aim in RB, if necessary, which further confirms sniper specialization of ST-A2.

7.62 mm M1919A4
Mount Capacity (Belt) Fire rate Vertical Horizontal
Coaxial 4,500 (250) 500 N/A N/A

Usage in battles

As the ST-A is Japan's first tank project for a new era of tank development, it shows the same gameplay issues as the Chi-Ha. The weak armour, the slow to mediocre turret rotation speed, quite a long hull and high drop-rate of shells.

But its not just all negatives, the mobility is good for what it is, has adequate gun depression and the ST-A even comes with HEAT like the Chi-Ha, this time in the form of M348 HEAT-FS researchable as tier IV modification.

Other than the similarities to the Chi-Ha, the ST-A2 has its own factors good and bad which should be kept in mind when playing. From the very good reverse speed, great zoom factor and many shell options, the ST-A2 also has an angled front plate unlike the ST-A1, which does place the turret higher, allowing it to shoot over the engine, at the cost of having a higher profile. Also unlike the ST-A1, the .50 has been removed from the ST-A2 which will make it harder to deal with lighter vehicles and planes.

Gameplay

The plan is simple and similar to the Chi-Ha & other early Japanese medium tanks, you want to stay either near or behind your allies and not rush forward, you can't take much damage, but you can deliver a punch. Pre-aim the turret and guide the enemy tanks into the sights as the rotation speed isn't of the fastest.

The further you are from your enemy the better for the inadequate armour, The ST-A comes with an amazing zoom factor and allows for clear sniping, but do keep in mind the shell drop-off are rather high.

Before you have your hands on the HEAT-FS, the safest bet is to exploit the flanks of the enemy, especially when starting with only AP, frontal penetrations won't happen reliable with the tanks the ST-A faces, try aiming for ammo racks, put a solid round into cramped crew members while trying to get the M82 shot and back up into cover or behind corners as the crew reloads the shell.

After unlocking the M82 APHE, placing shots is less important, once it penetrates, it's most likely to blow up good. It will come at the cost of the extra penetration, but when aiming for the sides, extra penetration isn't required. It's still a good idea to bring some AP shells with the tank just in-case you have to fight in a frontal engagement and the APHE fails to penetrate.

With the HEAT-FS finally unlocked, you can fully make use of the punches you can deal and the zoom you have, help your allies out with the toughest of enemies and simply frontally penetrate them.

Pros and cons

Pros:

  • Overall better sniper qualities than ST-A1 (but they only really matter in RB)
  • Can defend itself against other tanks in case of a rear flank, unlike ST-A1
  • Harder to hit ammo rack in turret from the front, and overall better protection against autocannons, HEAT and pure AP in turret
  • Harder to be destroyed by HE shot to the turret, can technically tank some attacker's plane assault with its front
  • Harder to destroy by poorly aimed shot in down-tier

Cons:

  • Worse against light tanks than predecessor due to lack of 12.7 mm MG
  • Still can be destroyed in one shot by nearly anything on battlefield via crew knockout, as long as they have APHE or HESH
  • Raised turret still cannot use certain hull down spots, but raises tank's profile
  • Hull weak spot is even more relevant now

History

The ST-A2 is an experimental medium Japanese tank, one of the first vehicles developed by Japan after the war. When the question of the need to develop new military vehicles came to the fore, Japanese experts with previous experience from the war got to work. The ST-A1 was the first step, and was intended to lack the main drawbacks of the American vehicles in service with the Japan Self-Defense Forces, more specifically their weight, size and their controls, unsuitable to Japanese tankers for physiological reasons. The development of ST-A1 began in 1954 and was ready by December 1956. The next stage on the path to the series-produced Type 61 was the new ST-A2, put into development in 1956.

The ST-A2 medium tank was finished by February 1957, and differed from the ST-A1 in a range of characteristics. The vehicle was made 20 centimetres taller and half a metre shorter in length. This reduction in length also allowed for a reduced number of lower track rollers and supporting wheels. The new vehicle had an altered turret shape which had been made longer, and its rear contained a compartment for a radio. With the aim of increasing the tank's survivability, the upper frontal hull received characteristic side angles which increased the chance of a ricochet off the hull. The ST-A2's tracks were also redesigned and equipped with more advanced cleats designed to raise the vehicle's mobility and road characteristics. Other than this, its composition remained identical to that of the ST-A1. The diesel engine was housed in the rear of the hull, while the transmission remained in the front. The armament on this Japanese tank was American through and through. The 90mm M3A1 cannon was borrowed from the M46 tank, and it was accompanied by two different calibre Browning machine guns.

Only two experimental prototypes of the ST-A2 were built. They underwent testing, but were never accepted into service.

- From Devblog

Media

Skins
Videos

See also

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

External links


Japan medium tanks
Type 97  Chi-Ha · Chi-Ha Kai · Chi-Ha Kai TD · Chi-Ha Short Gun
Type 1  Chi-He · Chi-He (5th Regiment) · Ho-I
Type 3  Chi-Nu · Chi-Nu II
  Ka-Chi
Type 4  Chi-To · Chi-To Late
Type 5  Chi-Ri II
Type 61 MBT  ST-A1* · ST-A2* · ST-A3* · Type 61
Type 74 MBT  ST-B1* · Type 74 (C) · Type 74 (E) · Type 74 (F) · Type 74 (G)
Type 90 MBT  Type 90 · Type 90 (B)
USA  ▅M4A3 (76) W · ▅M47
  *ST-X is prototype stage for said MBT