Fd. 5.5 Gun

The **Fd. 5.5 Gun** is a light artillery piece in service with the Imperial Navy, 10 cm in caliber. The original Fd. 5.5 Gun was introduced in 1900, the current models being the Modell 18 and the Modell 26, the latter in a dual-purpose mount enabling it to act both as an anti-surface and an anti-aircraft gun.

The Imperial Army uses a howitzer of a similar caliber, the Fd. 5.5 Howitzer. Neither gun uses similar ammunition. Modell 11 and Modell 18 guns use the same ammunition, while Modell 26 guns use a new type of shell.

## Design

### Modell 11

The Modell 11 is the successor to the original Modell 1900. As a quick-loading gun, it fired fixed 5.5 Faden (or 10 cm) shells of 17.5 kg over a distance of 13 km at 30 degrees of elevation - the gun can be elevated from -10 degrees to +35 degrees.

Currently, old Modell 11 guns and mounts are used up on auxiliary vessels and in coastal defenses.

### Modell 18

The Modell 18 was basically the same gun as the Modell 11, but in a new mount, which allowed the gun to be elevated to +75 degrees, technically a dual-purpose mount, but not yet. The Modell 18 is also used on submarines as a deck gun.

### Modell 26

The Modell 26 is a 3 ton heavy (barrel and breech) gun firing a 13 kg shell over a distance of 14 km or 11 km upwards effectively (the shells can reach ranges up to 20 km and 13 km respectively). The gun has a high muzzle velocity, shortening the service life of the 6.8 meter long barrel to between 350 and 400 effective full charges.

## Mounts

The Fd. 5.5 Gun is available in single and double mounts as secondary artillery for larger cruisers and battleships, as single-mount main artillery for destroyers and torpedo boats and in casemates for fortresses.

**Ships**

Battleships: Kayfer-class Fast Battleship, Eyckenbaum-class Battleship, Imperatrix Gundel class Battleship, Bucks-class Fast Battleship
Battlecruisers/"The heavy cavalry of the Fleet": Feuerreiter-class Battlecruiser, Tauläufer-class Battlecruiser, Furtenland-class Battlecruiser (decommissioned)
Aircraft Carriers: Feuerbergadler-class Aircraft Carrier (to be commissioned 1941-1944), Tiefbucht-class Light Aircraft Carrier (to be commissioned 1942-1945), Waldschatten-class Aircraft Carrier, Early Aircraft Carriers of the Imperial Navy

**Boats**

Cruisers/"The light cavalry of the Fleet": Prinz-class Cruiser, Prinzessin-class Cruiser, Stadt-class Scout Cruiser
Destroyers: Zerstörer 1935 (Z-211 to Z-240, 30 units), Zerstörer 1925 (Z-151 to Z-210, 60 units), Einheitszerstörer a.k.a. Zerstörer 1918 (Z-121 to Z-150, 30 units) and Zerstörer 1915 (Z-113 to Z-130, 18 units), Zerstörer 1910 (42 units, decommissioned, awaiting scrapping)
Frigates/Flottenbegleiter: Flottenbegleiter 1928
Torpedo Boats: Torpedoboot 1922
**Supply and Support Vessels**

Other: SIM Kloster Garremach (training ship), Unterstützungsboot 1917 (support boat)

**Other Equipment**

**Battleship Artillery:** Modell 24 Fd. 25 Gun (45.5 cm gun), Modell 22 Fd. 22 Gun (40 cm gun)
Fd. 19.5 Guns (35.5 cm guns): Modell 18 Fd. 19.5 Gun, Modell 28 Fd. 19.5 Gun
**Cruiser Artillery:** Modell 25 Fd. 8.25 Gun (15 cm gun)
Fd. 11 Guns (20 cm guns): Modell 10 Fd. 11 Gun, Modell 15 Fd. 11 Gun, Modell 21 Fd. 11 Gun, Modell 28 Fd. 11 Gun
**Destroyer Artillery:**
**Fd. 5.5 Guns** (10 cm guns): Modell 11 Fd. 5.5 Gun, Modell 18 Fd. 5.5 Gun, Modell 26 Fd. 5.5 Gun (dual purpose mount)
For destroyers with delusions of grandeur: Modell 25 Fd. 8.25 Gun
Anti-Aircraft Artillery: Modell 31 Fd. 2 Gun (36 mm AA-gun), Modell 20 Fd. 1.4 Gun (2.55 cm AA-gun), Modell 26 Fd. 5.5 Gun (10 cm gun, dual purpose mount)
Torpedoes: Fd. 24.7 Aerial Torpedo (450 mm torpedo), Fd. 33.5 Torpedo (610 mm torpedo)
Rockets: Rockets of the Imperial Navy
Mines: Naval mines of the Imperial Navy
Aircraft: List of Aircraft in service with the Imperial Armed Forces
Radar: *Present and accounted for*
Sonar: *Present and accounted for*

Also see: Women in the Imperial Armed Forces, Doctrine of the Imperial Navy, Structure of the Imperial Navy in 1930, Structure of the Imperial Navy in 1940, Marine-Schützen-Korps, Imperatorwerften Wahlerhaven.
Competitors: Shipclasses and equipment of the Sultan's Navy, Structure of the SDF-Navy in 1942, Structure of the Lutetiian Navy in 1942
Project 1940: Structure of the SDF-Navy in 1942, Structure of the Sultan's Navy in 1940, Structure of the Armed Forces of the Principality in 1940, Structure of the Lutetiian Navy in 1942, Structure of the Armed Forces of the Empire of Kupandukira in 1940