WesWorld

List of Weapons

5.1"
4.5"
4.33" (Chilean weapon)
4"
3.95"
3"
2.95"
1.57" (40mm)
37mm (Chilean weapon)
1" (25mm)
0.78" (20mm)

The Atlantean 5.1"/55 (130 mm) gun is the mainstay of the Atlantean navy. It replaced the 4" gun in 1928 the main armament on destroyers and as a secondary armament on newer battleships, aircraft carriers and some classes of heavy cruiser. The gun itself has changed little with only slight refinements to the breach mechanism. The biggest changes have been made in the gun mounts, turrets and hoists. The first guns were used on the H class destroyers in shielded ring base mounts hand loaded with a vertical breach block, while the latest guns are mounted in halfdeck turrets with improved hoists, rammers and loading mechanisms.

The 5.1" is made up of the following marks:

Mk 1/45 1928, shielded mount hand loaded, 12-16 rounds per minute
Users-
Atlantis: H class
Chile: Chiloe class CVL

Mk 2/45 1932, fully enclosed turret, manually loaded, power rammed, 15-20 rounds per minute
Users-
Atlantis: I/J/K class DD
Chile: Capitan Thompson, Almirante Lynch class DD
Colombia: Santander class BC, Cali class AC, Almirante Pidila/Buenaventura class CLAA, Pereira/Tunja/Yopal class CLAA, San Augustine/San Jacinto class DD

Mk 3/55 1936, fully enclosed half deck turret, manually loaded, power rammed, 18-20 rounds per minute
Users Atlantis: Neptune class BB, Vengeance class BC, Arcturus class CV, Nereus class CV, Perseus class CA, Medusa/Nemesis/Zerberus class CLAA, L,M and N class destroyers, Venture/Venerable class Tenders
Brazil: *Turrets only* Arara/Santos de Espar class DD's
Bulgaria: Sofia II class BB, Drazki class DD
Chile: Libertad, Patria class CV, Blanco Encalada, Capitan Prat class BC, Constitución class CA, Concepcion, Voluntario, Temerario, Capitan Eyzaguirre, Aldea class DD, Disembarkment of Pisagua class LSD
Colombia: Almirante Brión class CA, San Roque class DD
Irland: LÉ Connacht class DD
Turkey: Hizar Reis, Murat Reis class CA, Yar Hisar class DD

Mk 4/55 1940, fully enclosed half deck turret, autoloaded and rammed, 20-22 rounds per minute, first trialed in Chilean Battle class DD

Users-
Atlantis : Helios class CV, Phoenix class CA, Archer class DD
Bulgaria: Neustrashimi, Kyustendil class DD
Chile: Arica and Concepción class CLAA, Battle class DDL, Almirante Williams, Cerro Vitz Roy, Almirante Simpson, Chacabuco, Bolados class DD
may not be accurate for Chilean info*

There are two types of 4.5" gun in Atlantean service. The 4.5"/45 1918 quick firing gun and the 4.5"/45 1926 dual purpose gun.

The 4.5"/45 1918 gun was designed late in the great war as a gun that could combine the heavy hitting properties of a larger gun like the 5.5" with the rapid fire qualities of the 4" gun to allow installation on smaller warships, allowing cruisers to have a more homogenous armament (the Nereus class cruiser of 1910 had 6", 4" and 3" guns for various roles) and give destroyers and scouting cruisers heavier guns. The end of the war meant that a limited number of guns were produced, no new warships then building or planned were completed to incorporate the weapon and funding was limited for refits for ships already in service. In addition the 4" was produced in significant quantities and with the end of hostilities the Atlantean naval design bureau was reviewing future destroyer and cruiser designs based on wartime experience. The Cleito treaty also influenced how the design would be used in the future as a result of the treaty terms regarding cruiser displacement. The decision was made to use the gun on larger warships and design was mounted on the first treaty Class A cruisers, the Menelaus class (replacing the designs original planned outfit of 8 single 4" guns) for use as an anti-surface gun for smaller fast enemy warships. During the construction of the Menelaus class the gun design was modified to fulfill the Anti aircraft role but too late to be installed on the class. The gun would be known as the 4.5"/45 1926.

The 4.5/45 1926 gun was used on Class A cruisers until the adoption of the 3.95" gun as a dual purpose gun for both class A and B cruisers. It came in two turret types. The Mk 1 was a shielded mount while the Mk 2 was an enclosed turret, neither having hoists. The 4.5"45 1926 wasn't entirely satisfactory in the AA role due to its limited gun elevation. It was never mounted on light cruisers due to the decision to mount purely AA weapons (3"/45 1906) as a secondary armament. Only the Pioneer class light cruisers used this gun due to their 7.5" guns being removed. Curiously the Dent class destroyers were fitted with a fully enclosed mount and used modified 5.1" hoist mechanisms in one last attempt to use the weapon on smaller ships. The Philomedes class battleships were also equipped with similar weapons that were ultimately replaced by the 3.95" DP gun in their 1944 refits.

4.5"/45 1918 users: Atlantis only- Menelaus class CA
4.5"/45 1926 Mk 1 turret users: Atlantis only- Apollo, Dardanus class CA, Pioneer class CL, Cape Verde class training ship, Lamia, Upsurge class airship tenders
4.5"/45 1926 Mk 2 turret users: Atlantis only- Philomedes class BB, Torto class CAE, Dent class DD (with hoists)

The Chilean 4.33" quick firing gun was never mounted on warships in the Atlantean navy. However fifty one guns were obtained from the refits of the ex Chilean Volcan Osorno into Atlantean service (11 guns) and the Colombian (ex Chilean) Capitan Oyama class armored cruisers (40 guns). All have been put in storage for potential wartime installation on merchant ships, most are in good working order. This gun is a Nordish design manufactured in Chile.

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The Chilean 37mm gun was never used on Atlantean warships, having instead been acquired from the refits of the Volcan Osorno into Atlantean service (12 guns) and the Colombian Capitan Oyama class ships (48 guns), all in twin mounts totaling sixty guns. As with the Chilean 4.33" gun these weapons were put into storage for possible wartime emergency fitting on merchant ships or as possible replacements for the limited number still being used in the Colombian navy on their converted AA cruisers purchased from Argentina.

Future project is to go here

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