Difference between revisions of "STB-1"

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Revision as of 20:39, 28 April 2021

RANK 4 FRANCE
Somua SM PACK
STB-1
AB RB SB
7.7 7.7 7.7
Class:
Research:160 000 Specs-Card-Exp.png
Purchase:390 000 Specs-Card-Lion.png
Show in game

Description

The STB-1 is a rank V Japanese medium tank with a battle rating of 7.7 (AB/RB/SB). It was introduced in Update 1.65 "Way of the Samurai" along with the initial Japanese Ground Forces tree. The prototype of the Type 74, the STB-1 presents many features that would be in the final design.

The STB-1 is the first researchable tank in Japan's Ground Forces Rank V. Despite having considerable more armour than its comparable counterparts the Leopard 1 and Leopard A1A1, as well as comparable mobility, it is not recommended as a front-line tank like the 'Allied' counterparts. Instead, a cautious hit-and-run tactic like the Leopards should always be employed. Using the tank's hydropneumatic suspension correctly can help with the tank's depression, and in some cases, aid in survivability. Do note that the L7 on this tank reloads significantly longer than other L7-equipped tanks.

The STB-1 is unique among being one of the only Japanese tanks that can take a hit, like the Type 4 Chi-To Late and Type 5 Ho-Ri Production. It has thick frontal hull armour that can bounce shots effectively, but should not be relied on. The tank is quite fast and is further aided by the Hydropneumatic suspension, which allows this tank to manoeuvre the battlefield much like a Leopard, however the abundance of larger, more open maps at higher ranks means that getting from point A to B - and not getting shot - is not a simple as it sounds.

General info

Survivability and armour

Smoke grenades
Creation of a smoke screen in front of the vehicle
Armourfront / side / back
Hull80 / 40 / 25
Turret100 / 75 / 40
Crew4 people
Visibility96 %
Armour Front Sides Rear Roof
Hull 40-80 mm (64-73°) Front glacis
100 (26°), 80 mm (58-66°)Lower glacis
35-40 mm (44°) Top
40 mm (0-55°) Bottom
25 mm (1-46°) 20 mm
Turret 132 mm (12-66°) Turret front
100-200 mm (1-66°) Gun mantlet
132 mm (1-54°)
75 mm (26-61°) Rear
40 mm (1-64°)
40 mm (36-82°) Turret underside
67 mm Front
20 mm Rear
Armour Sides Roof
Cupola 30 mm 30 mm

Notes:

  • Suspension wheels and tracks are 20 mm thick.
  • Driver's vision port on the front glacis are only 50 mm thick.
  • Hull roof is rated to be 54 mm effective against HE.

Mobility

 
Controlled suspension
It is possible to adjust the ground clearance or more complex suspension positions
Speedforward / back
AB59 / 23 km/h
RB and SB53 / 21 km/h
Number of gears7 forward
2 back
Weight38.0 t
Engine power
AB1 431 hp
RB and SB750 hp
Power-to-weight ratio
AB37.7 hp/t
RB and SB19.7 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 59 23 38 1,162 1431 30.58 37.66
Realistic 53 21 663 750 17.45 19.74

Modifications and economy

Repair costBasic → Reference
AB5 050 → 7 514 Sl icon.png
RB6 660 → 9 910 Sl icon.png
SB4 580 → 6 815 Sl icon.png
Total cost of modifications123 900 Rp icon.png
189 100 Sl icon.png
Talisman cost2 200 Ge icon.png
Crew training110 000 Sl icon.png
Experts390 000 Sl icon.png
Aces1 300 Ge icon.png
Research Aces780 000 Rp icon.png
Reward for battleAB / RB / SB
110 / 180 / 200 % Sl icon.png
202 / 202 / 202 % Rp icon.png
Modifications
Mobility Protection Firepower
Mods new tank traks.png
Tracks
Research:
8 600 Rp icon.png
Cost:
13 000 Sl icon.png
310 Ge icon.png
Mods new tank suspension.png
Suspension
Research:
4 800 Rp icon.png
Cost:
7 100 Sl icon.png
170 Ge icon.png
Mods new tank break.png
Brake System
Research:
4 800 Rp icon.png
Cost:
7 100 Sl icon.png
170 Ge icon.png
Mods new tank filter.png
Filters
Research:
6 400 Rp icon.png
Cost:
9 500 Sl icon.png
230 Ge icon.png
Mods new tank transmission.png
Transmission
Research:
8 400 Rp icon.png
Cost:
12 000 Sl icon.png
300 Ge icon.png
Mods new tank engine.png
Engine
Research:
8 400 Rp icon.png
Cost:
12 000 Sl icon.png
300 Ge icon.png
Mods tank tool kit.png
Parts
Research:
5 600 Rp icon.png
Cost:
13 000 Sl icon.png
310 Ge icon.png
Mods extinguisher.png
FPE
Research:
3 100 Rp icon.png
Cost:
7 100 Sl icon.png
170 Ge icon.png
Mods tank reinforcement jp.png
Crew Replenishment
Research:
6 400 Rp icon.png
Cost:
9 500 Sl icon.png
230 Ge icon.png
Mods new tank horizontal aiming.png
Horizontal Drive
Research:
8 600 Rp icon.png
Cost:
13 000 Sl icon.png
310 Ge icon.png
Mods tank cannon.png
Adjustment of Fire
Research:
4 800 Rp icon.png
Cost:
7 100 Sl icon.png
170 Ge icon.png
Mods tank ammo.png
105mm_usa_HESH_ammo_pack
Research:
4 800 Rp icon.png
Cost:
7 100 Sl icon.png
170 Ge icon.png
Mods night vision device.png
NVD
Research:
4 800 Rp icon.png
Cost:
7 100 Sl icon.png
170 Ge icon.png
Mods new tank vertical aiming.png
Elevation Mechanism
Research:
6 400 Rp icon.png
Cost:
9 500 Sl icon.png
230 Ge icon.png
Mods tank ammo.png
105mm_us_M416_Smoke_ammo_pack
Research:
6 400 Rp icon.png
Cost:
9 500 Sl icon.png
230 Ge icon.png
Mods smoke screen.png
Smoke grenade
Research:
6 400 Rp icon.png
Cost:
9 500 Sl icon.png
230 Ge icon.png
Mods art support.png
Artillery Support
Research:
8 400 Rp icon.png
Cost:
12 000 Sl icon.png
300 Ge icon.png
Mods tank ammo.png
105mm_usa_HEAT_FS_ammo_pack
Research:
8 400 Rp icon.png
Cost:
12 000 Sl icon.png
300 Ge icon.png
Mods tank laser rangefinder.png
Laser rangefinder
Research:
8 400 Rp icon.png
Cost:
12 000 Sl icon.png
300 Ge icon.png

Armaments

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

Main armament

Two-plane stabilizer
Reduces the swing of the gun in two planes while moving
Ammunition50 rounds
First-order15 rounds
Reloadbasic crew → aces
10.8 → 8.3 s
Vertical guidance-6° / 9°
Main article: L7A3 (105 mm)
105 mm L7A3 Turret rotation speed (°/s) Reloading rate (seconds)
Mode Capacity Vertical Horizontal Stabilizer Stock Upgraded Full Expert Aced Stock Full Expert Aced
Arcade 50 -6°/+9° ±180° Two-plane 22.8 31.6 38.4 42.5 45.2 10.80 9.55 8.80 8.30
Realistic 14.3 16.8 20.4 22.6 24.0

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
M392A2 APDS 303 302 296 277 257 252
M393A2 HESH 127 127 127 127 127 127
M456 HEATFS 400 400 400 400 400 400
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%
M392A2 APDS 1,478 4 N/A N/A N/A 75° 78° 80°
M393A2 HESH 732 14.85 0.4 0.1 4,310 73° 77° 80°
M456 HEATFS 1,173 10.5 0.05 1 1,270 65° 72° 77°
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)
M416 730 11.4 20 5 25 50

Ammo racks

Ammo racks of the STB-1
Full
ammo
1st
rack empty
2nd
rack empty
3rd
rack empty
4th
rack empty
Visual
discrepancy
50 44 (+6) 16 (+34) 10 (+40) (+49) No

Notes:

  • Hull floor empty: 16 (+34) shells
  • Shells are modeled individually and disappear after having been shot or loaded.
  • Racks 3 and 4 are first stage ammo racks. They total 15 shells and get filled first when loading up the tank.
  • These racks are also emptied early: the rack depletion order at full capacity is: 3 - 4 - 1 - 2.
  • Simply not firing when the gun is loaded will move ammunition from rack 1 then 2 into ready rack 4 then 3. Firing will interrupt the restocking of the ready racks.

Machine guns

Ammunition660 rounds
Belt capacity200 rounds
Reloadbasic crew → aces
10.4 → 8.0 s
Fire rate577 shots/min
Vertical guidance-10° / 40°
Ammunition4 500 rounds
Belt capacity250 rounds
Reloadbasic crew → aces
10.4 → 8.0 s
Fire rate500 shots/min
12.7 mm M2HB
Mount Capacity (Belt) Fire rate Vertical Horizontal
Pintle 660 (200) 577 -10°/+40° ±180°
7.62 mm M1919A4
Mount Capacity (Belt) Fire rate Vertical Horizontal
Coaxial 4,500 (250) 500 N/A N/A

Usage in battles

The STB-1 can be compared to the Leopard I or even a stock Leopard A1A1, but has its own capabilities in its own right. The STB-1 allows for both a more held down playstyle or aggressive playstyle versus the Leopard I due to its hydropneumatic suspension and two-plane stabilizer. Together with the power of the engine outfitted on the STB-1, allows it to speedily move to a nice sniper spot or hull-down position and fire at targets before they realize a tank could be there.

The STB-1 possesses a pretty nice angled upper front plate, but do keep in mind that the STB-1 wasn't designed to take a punch, only to deal a punch, so even with the good angle you shouldn't rely too heavily on it, as shells can penetrate it and won't always bounce off. Do keep this fully in mind especially when taking more shells with the vehicle, as the fuel tank next to the driver will be filled with extra shells, which can blow up the whole tank if a shell does eventually penetrate.

With the addition of a 12.7 mm machine gun, the STB-1 can make short work of ZSU's or light tanks alike if the heat of the battle doesn't allow for the main gun or in-case of more important targets requiring the main gun's firepower.

The main choice of ammo would usually be HEAT-FS when unlocked, with the occasional APDS for longer range sniping and try not to bring more ammo than required, filling the racks will only hurt more once it blows up.

Pros and cons

Pros:

  • Highly mobile, comparable to the German Leopard I
  • More armour than the German Leopard (around 100 mm hull and turret)
  • 105 mm L7 cannon found on other NATO tanks
  • May bounce APHE shells
  • Low profile
  • Utilization of hydropneumatic suspension allows for various offensive and defensive options
  • 12.7 mm Browning M2HB machine gun
  • Two-plane stabilizer that allows it to fire on the move

Cons:

  • Other areas are lightly armoured, vulnerable to high penetrating SPAA
  • Reload and top speed slower than Leopard
  • Small gun elevation angle
  • Engine can be vulnerable to some aircraft with powerful guns

History

The prototype for the Type 74. Known in Japanese as 74式戦車の試作車STB-1 (ななよんしきせんしゃのしさくしゃSTB-1). Created in September 1969 along with STB-2 in the STT program. Due to issues with cost effectiveness these two prototypes were not considered for the replacement of the Type 61. In a bid to reduce costs STB-3, STB-4, STB-5 and STB-6 were produced between April 1970 to December 1971. The final judgement for the STT program was held in November 1973 which lead the line to be completed in 1974. And, production started the following year in 1975 for the Type 74.

Media

Skins
Videos

See also

Related Development
  • Type 74 - (Production version)
  • Type 74 (F) - (Variant allowing to equip a mine-roller)
  • Type 74 (G) - (Improved () variant with thermal and armor skirts)
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
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 · 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