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World of Warships Supertest: Japanese Premium Tier IX Battleship Iwami

4 min read

Historical background

Iwami is based on two of the preliminary A-140 designs that lead to the Yamato-class battleships. She gets the general armament layout and hull design of the A-140-J3 with four main battery turrets in AB-XY configuration for the main battery and then three triple 155 mm secondary turrets around the Y turret. However, she gets the main armament of the B2 variant with four twin turrets.

Now on that table, the main battery caliber is 40 cm (400 mm) but it’s how Japan was calling the 460 mm guns. Iwami on the other end is armed with 410 mm guns. The ship also getting a Kii-like refit with two quadruple torpedo launchers at the rear as well as many twin 100 mm secondaries.

Iwami will be available for coal when the ship will be finalized. While we don’t know how much she will cost, it should be 228 000 like the other Tier IX battleships available for coal.

Ship’s preview

Ship’s commemorative flag

Ship’s camouflage

For the classic reminder, this is a ship in testing, anything can change so don’t look at her like she would already be released.

Modules

Hull
Engine
Gun Fire Control System
Main battery
Torpedoes

icon_module_Hull_installed

Iwami

icon_module_Engine_installed

Propulsion: 145 000 HP

icon_module_Suo_installed

Type9 mod. 1

icon_module_Artillery_installed

410 mm/50 10th Year Type Mod.A in a twin turret

icon_module_Torpedoes_installed

Type90 mod. 1

General Characteristics

Tier X
Health 80 700 HP
Torpedo Damage Reduction 20 %
Displacement 58 962 tons
Dimensions
Overall length 255.2 m
Beam 37.4 m
Overall height (keel to the highest point on the ship) 35.71 m
Freeboard 6.24 m
Main Armament
Maximum Firing Range 20.300 km
410 mm/50 10th Year Type Mod.A in a twin turret 4 x 2 410 mm
Secondary Armament
Maximum Firing Range 6.950 km
155 mm/60 3rd Year Type in a triple turret
100 mm/65 Type 98 on a Model A mount
3 x 3 155 mm
8 x 2 100 mm
Torpedo Armament
Maximum Firing Range 12.000 km
610 mm Quad
2 x 4 610 mm
Maximum speed 28.2 knots
Turning Circle Radius 880 m
Rudder Shift Time 17.1 s
Surface Detectability 16.38 km
Air Detectability 12.19 km
Detectability After Firing Main Guns in Smoke 15.94 km

Main Armament

4 x 2 410 mm/50 10th Year Type Mod.A in a twin turret
 Maximum Firing Range 20.300 km
 Reloading Time 25.0 s
180 Degree Turn Time 35.0 s
Optimal firing angles at the front 25°
Optimal firing angles at the rear 28°
Sigma 1.9 sigma
Maximum Dispersion 230 m
Shells
Type of Projectile  HE – 410 mm HE Type 01
Alpha Damage 6 500
Penetration capacity  68 mm
Explosion size 2.34
Fire chance 30 %
Projectile Speed 834 m/s
Air Drag 0.34
Projectile Mass 1 016.0 kg
Type of Projectile AP – 410 mm AP/APC Type 01
Alpha Damage 12 750
Projectile Speed 834 m/s
Air Drag 0.34
Projectile Mass 1 020.0 kg
Projectile Krupp 2 650
Projectile Detonator 0.033 s
Detonator threshold 68 mm
Ricochet Angles 45° – 60°

Secondary Armament

3 x 3 155 mm/60 3rd Year Type in a triple turret
Maximum Firing Range 6.950 km
Reloading Time 12.0 s
Sigma 1.0 sigma
Shells
Type of Projectile HE – 155 mm HE Type0
Alpha Damage 2 600
HE penetration 26 mm
Explosion Size 0.55
Chance to Cause Fire 10 %
Projectile Speed 925 m/s
Air Drag 0.335
Projectile Mass 55.87 kg
8 x 2 100 mm/65 Type 98 on a Model A mount
Maximum Firing Range 6.950 km
Reloading Time 3.0 s
Sigma 1.0 sigma
Shells
Type of Projectile HE – 100 mm HE Type98
Alpha Damage 1 700
HE penetration 30 mm
Explosion Size 0.28
Chance to Cause Fire 6 %
Projectile Speed 1 000 m/s
Air Drag 0.331
Projectile Mass 13.0 kg

Torpedo Armament

2 x 4 610 mm Quad
Type93 mod. 3
Reloading Time 120 s
Maximum Distance 12.000 km
Firing angles at the Front 46°
Firing angles at the Rear 41°
Damage 23 767
Flooding Chance 406%
Speed 67 knots
Surface Detectability 1.7 km

Anti-air Armament

8 x 2 100 mm/65 Type 98 on a Model A mount
Sector range 0.1 km – 5.8 km
Hit chance 75 %
Sector’s damage 58
Sector’s damage frequency 0.29 s
Sector’s damage per second 203
Flak clouds number 8
Flak cloud damage 1 470
18 x 1 25 mm/60 Type 96 on a single mount
24 x 2 25 mm/60 Type 96 on a twin mount
12 x 3 25 mm/60 Type 96 on a triple mount
Sector range 0.1 km – 2.5 km
Hit chance 85 %
Sector’s damage 81
Sector’s damage frequency 0.29 s
Sector’s damage per second 284

Consumables

Slot 1
Slot 2
Damage Control Party
consumable_PCY009_CrashCrewPremiumWork time: 15 s
Cooldown: 80 s
Repair Party
Number of charges: 4
Work time: 28 s
Cooldown: 80 s
HP regeneration speed: +0.5%/s
Casemate damage regeneration: 50%
Citadel damage regeneration: 10%

The Armor

External armor protection:

Front and rear armor protection of the middle section:

Main armor deck:

Citadel armor protection:

Turrets armor protection:

Hidden armor protection inside the stern:

Personal Opinion

Right now, I am really not impressed. Iwami is in a very uncomfortable situation because she has to compete with three other ships of the same nation, tier and archetype. While Hizen is decent at best, there is also Izumo which is very strong and Musashi that is straight up overpowered.

The problem is that compared Izumo and Musashi, she lacks firepower with amazing penetration or even overmatch and on top of that, lacks the tanking capacity.
As for a comparison with Hizen, it gets awkward, they have pretty much the same DPM but while Hizen has the volume of fire, Iwami has the reload speed. It is basically one of these annoying cases where you have two ships filling the same role but with different approach while getting the same results. There are other soft stats that change but in the end, the difference isn’t big for them. Considering that Hizen left me deeply unimpressed back in the days, hopes are low for Iwami.

Technically, she has torpedoes and 100 mm secondaries for brawling engagements but it’s nothing to celebrate as she also loses the capacity to use a Spotting Aircraft.

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5 thoughts on “World of Warships Supertest: Japanese Premium Tier IX Battleship Iwami

  1. Sorry, but I disagree on your conclusion that it uses the B2 designs main battery.
    In the design graph you posted, it lists the Type 94 40cm cannon for the B2 design, which was the cover-up name for the Yamato’s 46cm cannons (according to navweaps and other websites).
    Which would make the 40cm cannons from the J3 design be the standard IJN’s 41cm artillery.

    http://www.navweaps.com/Weapons/WNJAP_18-45_t94.php

  2. Sorry, but I disagree with your conclusion about the Iwami using the B2 design’s main artillery.
    In the chart you posted it lists the Type 94 40cm cannons, which are the Yamato’s 46cm cannons according to various sources. Since the J3’s design doesn’t specify Type 94 cannons, it most probably refers to 41cm cannons instead.
    Unfortunately, there is no entry on that chart for 4×2 41cm cannons, so I ***ume they downgraded the J3’s design’s 4×3 turrets to 4×2.
    Since WG specifies the cannons as being 50 calibres in length, it are more or less the same cannons as on the Izumo, but with lower muzzle velocity (fewer powder bags used?). Which might also account for the slightly lower alpha and penetration values.

  3. Sorry, but I disagree with your conclusion about the Iwami using the B2 design’s main artillery.

    In the chart you posted it lists the Type 94 40cm cannons, which are the Yamato’s 46cm cannons according to various sources.

    And that is exactly what I said just below the table. That Iwami is using 410 mm guns instead.

  4. Yes, I was referring to the part where you said under the “historical background” header:
    “However, she gets the main armament of the B2 variant with four twin turrets.”
    Sorry for any confusion.

  5. All I can say is Hizen was worse than this ship, poor sigma, reload time, and traverse. Instead of making improvements on a ship no longer available, here comes Iwami. Four less guns, torpedo tubes, with better sigma, reload time, and turret traverse the bottomline this is a recycled Hizen. WG is hoping that Iwami will do what Hizen was supposed to do and failed – to replace the Musashi (a ship no longer available (except at Christmas)) at Tier IX.

Comments are closed.