Main battery formulas
Shell Grouping (σ)2
Shell grouping (sigma); shown in-game as Shell Grouping.
Max Horiz Disp79.9 m
Horizontal dispersion ellipse width at max range, from the verified WoWS dispersion model: $\sigma_H = \left(\dfrac{R}{30}\cdot\dfrac{\text{idealRadius}-\text{minRadius}}{\text{idealDistance}} + \text{minRadius}\right)\cdot 30$ $= \left(\dfrac{8650}{30}\cdot\dfrac{8-0.5}{1000} + 0.5\right)\cdot 30 = 79.9\,\text{m}$
Max Vert Disp47.9 m
Vertical dispersion ellipse height at max range: $\sigma_V = \sigma_H \cdot \text{radiusOnMax}$ $= 79.9 \cdot 0.6 = 47.9\,\text{m}$
Med Horiz Disp25.5 m
50%-hit horizontal radius: $\sigma_{H,50} = \sigma_H \cdot \text{GetHalfHitsRatio}(\sigma)$ $= 79.9 \cdot 0.319\;(\sigma = 2) = 25.5\,\text{m}$
Med Vert Disp15.3 m
50%-hit vertical radius: $\sigma_{V,50} = \sigma_V \cdot \text{GetHalfHitsRatio}(\sigma)$ $= 47.9 \cdot 0.319\;(\sigma = 2) = 15.3\,\text{m}$
AP Pen Close139.8 mm
Canonical community AP formula (jcw780/wows_shell), evaluated at muzzle velocity: $P = 10^{-7}\cdot K \cdot m^{0.69} \cdot d^{-1.07} \cdot v_0^{1.38}$ $= 10^{-7}\cdot 1721 \cdot 13.75^{0.69} \cdot 0.102^{-1.07} \cdot 880^{1.38} = 139.8\,\text{mm}$. Matches the in-game spec card.
AP Pen Far21.8 mm
Same formula at the ship's max firing range (10.8 km), where the shell has slowed to 229.1 m/s: $P = 10^{-7}\cdot 1721 \cdot 13.75^{0.69} \cdot 0.102^{-1.07} \cdot 229.1^{1.38} = 21.8\,\text{mm}$.
HE penetration17 mm
17 mm ≈ 100 mm caliber / 6 (standard HE penetration ratio).
AP overmatch6 mm
floor(100 mm caliber / 14.3) = 6 mm (AP auto-penetrates plating this thick or less).
AP AOE Radius3
AP shell over-penetration splash radius; scales with shell mass. Wickes 102mm = 3, standard 152mm CL ~ 20, Iowa 406mm ~ 270, Yamato 460mm = 400, Incomparable 650mm = 550 (max). Larger value = bigger splash damage area when AP over-pens.
Broadside guns used for alpha2
All 2 barrels bear on the broadside.
Turret turn time18 s
180 degrees / 10 deg/s traverse speed = 18 s.
HE full-salvo alpha2,900
1,450 HE damage x 2 broadside guns = 2,900.
AP full-salvo alpha3,300
1,650 AP damage x 2 broadside guns = 3,300.
Base HE DPM49,714
2,900 HE full-salvo alpha x 60 / 3.5 s base reload = 49,714.
Base AP DPM56,571
3,300 AP full-salvo alpha x 60 / 3.5 s base reload = 56,571.
Base shells/min34.3
2 broadside guns x 60 / 3.5 s base reload = 34.3.
Base fires/min2.06
2 HE shells x 60 / 3.5 s reload x 6% fire chance = 2.06.
Torpedoes
Torpedo detectability1.2 km
Estimated torpedo reaction time8.4 s
detectability / (speed kt x 2.6 community game-speed factor).
Torpedo speed55 kt
Travel time to max range56 s
range / (speed kt x 2.6 community game-speed factor).
Tube count6
2 launchers x 3 tubes.
Per-side salvo6 torpedoes
6 (centerline launchers train across - full salvo to either side).
Full-salvo damage30,198
All tubes hitting one target: tubes x per-torpedo simulated damage = 6 x 5,033 = 30,198.
Per-side salvo damage30,198
One side firing, all torpedoes hitting: per-side tubes x per-torpedo simulated damage = 6 x 5,033 = 30,198.
Damage Control Party
Smoke Generator
Engine Boost