Ship Database

Tier IX Battleship

United Kingdom

Duncan

Read full ship history

The further development of the 1920 battlecruiser became project G3. It differed from its predecessor by having a smaller main gun caliber of 419 mm, shorter length, and smaller displacement. In early 1921, the project was redesigned to enhance the armor at the expense of its speed and main caliber characteristics. In October of the same year, the construction of four ships under this project was ordered, but it was suspended amid the start of the Washington Naval Conference. Following its results, the construction order was canceled.

Credits: 15,000,000

At a glance

The numbers that shape the ship

Hit points: 66,900
Maximum speed: 32.0 knots
Surface detection: 14.9 km
Main battery range: 17.9 km
Main battery reload: 29.0 s

Combat envelope

Range and detection

Scale: 20 km

Every bar uses the same 20 km scale. Surface detection is a visibility threshold, not a weapon range.

Surface detection14.9 km
Main battery17.9 km
Secondary battery7 km
Torpedoes10 km

Damage comparison

Published maximum per hit

Ship-relative

Bars are normalized only against this ship's highest listed hit. They are not salvo damage, expected damage or DPM.

HE · 419 mm HE Mk Ia 6,150
AP · 419 mm AP Mk IIa 13,050
Torpedo · 622 mm Mk I 29,366

Handling, concealment and protectionOverview

Handling

Maximum speed: 32.0 knots
Turning circle radius: 910 m
Rudder shift time: 23.3 s

Maneuverability API rating 40

Concealment

Surface detection: 14.9 km
Air detection: 10.0 km
Submarine detection: 10.0 km

Concealment API rating 39

Survivability

Hit points: 66,900
Torpedo damage reduction: 23 %

Survivability API rating 84

Published armour thickness

Only positive values supplied by the API are shown.

Overall published range: 10–419 mm

Weapons and payloadsArmament

Surface armament

Main battery

Artillery API rating 88

Maximum range: 17.9 km
Reload time: 29.0 s
Rate of fire: 2.0 rounds/min
180° turn time: 30.0 s
Maximum dispersion: 198 m

Shells

Damage is the API's published maximum for one shell hit.

419 mm HE Mk Ia

Maximum damage per hit: 6,150
Fire chance: 47.0 %
Muzzle velocity: 792 m/s
Shell mass: 995 kg

419 mm AP Mk IIa

Maximum damage per hit: 13,050
Muzzle velocity: 747 m/s
Shell mass: 1,157 kg

Gun layout

Mount: 419 mm/45 Mk.I on a Mk.I mount
Mounts: 3
Barrels each: 3

Automatic armament

Secondary battery

Maximum range: 7.0 km

Mount: 152 mm HE Mk V
Maximum damage per hit: 2,150
Fire chance: 9.0 %
Rate of fire: 5.0 rounds/min
Muzzle velocity: 884 m/s

Mount: 113 mm HE 5crh
Maximum damage per hit: 1,700
Fire chance: 8.0 %
Rate of fire: 12.0 rounds/min
Muzzle velocity: 746 m/s

Underwater armament

Torpedoes

Torpedoes API rating 15

622 mm Mk I

Maximum range: 10.0 km
Maximum damage per hit: 29,366
Reload time: 55 s
Speed: 67 knots
Detectability: 1.7 km
180° turn time: 15.0 s

Torpedo-tube layout

Mount: 622 mm PR Mk II
Mounts: 2
Tubes each: 1

Anti-aircraft defence

AA defence API rating 75

Aura: 20 mm Oerlikon Mk.I on a Mk.IIA mount
Calibre: 20 mm
Mounts: 10

Aura: 40 mm/56 OQF Mk.1/2 on a Mk.IV mount
Calibre: 40 mm
Mounts: 10

Aura: 40 mm/39 Vickers QF Mk.VIII on a Mk.VII mount
Calibre: 40 mm
Mounts: 4

Aura: 113 mm/45 QF Mk.I/III on an RP10 Mark II BD mount
Calibre: 113 mm
Mounts: 8

Modules, hull and progressionTechnical data

Default hull

Hull hit points: 66,900
Main-battery barrels: 3
Secondary barrels: 14
Torpedo tubes: 2
AA mounts: 32

Engine

Published maximum speed: 32.0 knots

Fire control

Module research tree

Names, research prices and defaults are reported directly by the API.

622 mm Mk I

Default

Type: Torpedoes
Purchase: 1,500,000 credits

Mk IX mod. 1

Default

Type: Suo
Purchase: 1,500,000 credits
Next modules: 1

Mk IX mod. 2

Type: Suo
Research: 40,000 XP
Purchase: 3,400,000 credits

Duncan (A)

Default

Type: Hull
Purchase: 2,250,000 credits
Next modules: 1

Duncan (B)

Type: Hull
Research: 60,000 XP
Purchase: 5,100,000 credits
Next ships: 1

419 mm/45 Mk.I on a Mk.I mount

Default

Type: Artillery
Purchase: 1,500,000 credits

Propulsion: 160,000 hp

Default

Type: Engine
Purchase: 1,500,000 credits

Compatible upgrades

Official modernization descriptions and listed purchase prices. Effects still depend on the slot and configuration used in game.

Torpedo Tubes Modification 1

Modernization

Credits: 500,000

Concealment System Modification 1

Modernization

Credits: 2,000,000

Main Armaments Modification 1

Modernization

Credits: 125,000

Torpedo Tubes Modification 2

Modernization

Credits: 3,000,000

Aiming Systems Modification 1

Modernization

Credits: 500,000

Damage Control System Modification 2

Modernization

Credits: 1,000,000

Torpedo Lookout System

Modernization

Credits: 2,000,000

Main Battery Modification 3

Modernization

Credits: 3,000,000

Main Battery Modification 2

Modernization

Credits: 500,000

Damage Control System Modification 1

Modernization

Credits: 250,000

Steering Gears Modification 1

Modernization

Credits: 1,000,000

Secondary Battery Modification 1

Modernization

Credits: 500,000

Auxiliary Armaments Modification 1

Modernization

Credits: 125,000

Gun Fire Control System Modification 2

Modernization

Credits: 3,000,000

AA Guns Modification 1

Modernization

Credits: 500,000

Next ships

Research costs published in this ship's official progression data.

Ship: St. Vincent
Research cost: 255,000 XP

Available module groups: 10
Compatible upgrades: 15
Researchable next ships: 1
Upgrade slots: 6
Published battle levels: 9–11

Cross-nation comparison

Ships that fill a similar slot

Closest same-tier, same-class matches from other nations, ranked by published base statistics.

Pan-America

Los Andes

HP: 65,800
Speed: 30 kn
Guns: 17.8 km

Open comparison

France

Alsace

HP: 69,000
Speed: 30.4 kn
Guns: 18.4 km

Open comparison

U.S.A.

Illinois

HP: 68,100
Speed: 32.5 kn
Guns: 18.5 km

Open comparison