STB-1

The STB-1 is a Japanese tier 10 medium tank.

In the early 1960s, Mitsubishi started development of a new tank that complied with government requirements for armament and defense. The first two prototypes of the STB-1 were manufactured in September 1969 for trials. In 1970 the prototypes were shown to journalists and participated in a military parade.

A fast, semiaccurate medium tank with low but well sloped armor, very high DPM and high penetration.

The STB-1 marks the end of its Japanese medium line.
STB-1 (hình ảnh render của Wargaming)

Pros and Cons

Pros:

Fastest reload on a 105mm cannon
Great gun depression
Tough turret
Reasonably mobile
Good camouflage values and view range

Cons:

One of the worst overall dispersion values in its class and poor aim time for a medium at this tier
Gun mantlet gets weak towards the center
Poor overall hull armor, relies more on slope than thickness.
Receives frequent module damage due to crammed space and poor armor
Poor gun elevation

Performance

The STB-1 is similar to the previous tanks in the line, with the exception that it now has much better turret armor than the tanks before it. It can reliably hull down unlike its predecessors due to a much needed increase in turret armor. While no longer having the highest DPM on a tier 10 medium, it still has the fast reload and the 390 alpha damage of the L7, the STB-1 is a very serious threat when hull down as it can very quickly outgun almost anything that isn't an autoloader. The tank itself is very small and as a result has a good camouflage factor and is also relatively mobile. While its camouflage and mobility are not on the levels of a soviet medium such as the T-62A, they are still above average for their class. However to set it apart from soviet mediums, it has 10m more view range.

However, while it is a menace at medium to close range when hull down, the STB-1 performs poorly at long range. With poor dispersion values, a semi-high base aim time, and subpar base accuracy, the STB-1 has significantly longer exposure time than other tanks in its class, with the exceptions being the 121 and the Batchat 25t. In addition, the tank does not perform very well when not hull down. Its hull might be well angled, but the armor is very poor, meaning even light tanks can penetrate it frontally without too much trouble. To make things worse, the ammo rack sits in the front and is prone to damage and the driver often gets killed.

Last to note, while the turret overall is strong, the closer to the center of the gun mantlet shots land, the weaker the armor gets. Occasionally, high penetration HEAT rounds may also pen the turret even in stronger areas. Ultimately, the turret should be used to minimize exposure, not to deflect shells completely.