Ironcastle Airworks Iarrean

The **Ironcastle Airworks Iarrean**, marketed internationally as the **Ironcastle Airworks Ironbird** was a ground-attack aircraft developed and produced by Ironcastle Airworks for the SDF, where it was used by the SDF-Navy as a light and torpedo bomber, reconnaissance aircraft and liaison aircraft, while the SDF-Army used the aircraft as a light day bomber, ground-attack aircraft, target tug, reconnaissance and surveillance bomber, but also as a liaison aircraft.

The Iarrean made its first flight in 1936 and was introduced with the SDF in 1938. They replaced the Ironcastle Airworks Sleanna starting 1939. A number of Iarreans were exported over the course of the 1930s.

## Design

* single engine monoplane, low wing
	+ Wings with steel spars
	+ Mark I and Mark II have ailerons, elevators and rudder all metal-framed with fabric coverings, Mark III and Mark IV have entirely of metal
	+ trailing edge of metal
* clean design, oval-shaped fuselage
* crew of 3: pilot, observer/navigator and radio operator/air gunner
	+ Mark I, II and III: observer/navigator in prone position under pilot, also served as bomb aimer
	+ Mark IV: Observer/navigator dropped, additional fuel tanks, Mark IV more of a rocket and torpedo bomber
* robust, easy to fly
* self-sealing fuel tanks
* armoured cockpit
* In liaison role: liaison on air gunner seat, luggage on observer position
* service ceiling: 7,600 m

### Abroad

Machine Guns: Gabha R-22
Submachine Guns: Pistol, Automatic, Model 1923
Special Weapons: Rifle, Armour-Breaking, Model 1935
Sidearm: PSAM 1910
Ammunition: 8x57mm Gabha

**Artillery**
Heavy Artillery: Field Gun, 150mm, Model 1928
Light Artillery: Field Gun, 105mm, Model 1922, Field Gun, 76mm, Model 1930, Field Gun, 105mm, Model 1935
Mortars:
Anti-Tank Weapons: Gabha G-18 47mm Anti-Tank Gun
Anti-Aircraft Weapons: Ceantar C-44 40mm AA Gun, Gabha G-36 20mm Gun, Gabha G-91 135mm Gun (heavy anti-aircraft weapon)
Rockets: Rocket Barrage Anti-Aircraft System

**Vehicles**
Fast Tanks: Intaghi-Series/General Urtha's Lovelies (being phased out), Rian Fast Tank (being phased out), Urtha Fast Tank (under development, expected for 1943), Ruathar Fast Tank, Dobhareach Amphibious Tracked Vehicle (being introduced)
Half-Tracks: G 1 Caomnach (to be introduced in 1941), G 2 Cuachanach (being introduced)
Armoured Cars: Eireafada Armoured Car, Gadhar Armoured Car (expected for 1944)
Armoured Utility Vehicles: Colúr-Tankette
Unarmoured Utility Vehicles: FFR-Vehicles of the SDF
Self-Propelled Guns: Reilgire Gun Carrier (AT-SPG), Smiotaon Gun Carrier (AA-SPG)
Fighters: Shane Airworks Piongain (being phased out), Sciathán Léachtóir
Fighter-Bombers: Sciathán Sánnagh
Heavy Fighters: Sciathán Iolar
Bombers: M-22 Faoilean Medium Bomber
Torpedo Bombers (used as light bombers): LAF-3 (being phased out), Monarcha M-16 Giodróg Torpedo Bomber
Attack Aircraft: **Ironcastle Airworks Iarrean**, Ironcastle Airworks Sleanna
Reconnaissance and Maritime Patrol Aircraft: Shane Airworks Snámhán, Monarcha M-29 Prásóg
Transport Planes: Shane Airworks Lódálaí

Also see: Structure of the SDF-Army in 1940, List of Equipment of the SDF-Army, Equipment of the SDF-Navy in 1940

Light Cruisers: Rhiannon-class Light Cruiser, Cailleach-class Light Cruiser
Frigates: *Initial Equipment of the SDF-Navy*
Sloops: Miodóg-class Sloop
Torpedo Boats: Grey Wolf class Torpedo Boat, Reathaí-class Torpedo Boat
Aircraft Carrying Vessels: SDFS Faoileán (Seaplane Tender)
Submarines: F-1-class Submarine, F-5-class Submarine, F-10-class Submarine

**Amphibious Operations Vessels**

Attack Transport: Chromán-class Attack Transport
Vehicle Landing Ships: Crogall-class Vehicle Landing Ship

**Supply and Support Vessels**

Mine Warfare Vessels: Trádghaoth-class Mine Warfare Vessel
Tenders: Leaba-class Destroyer Tender,
Other: Survey Vessel SDFAS Dreaga, Type 6 Motorboat

**Aircraft:**
Fighters: Shane Airworks Piongain, Sciathán Léachtóir
Fighter-Bombers: Sciathán Sánnagh
Heavy Fighters: Sciathán Iolar
Bombers: M-22 Faoilean Medium Bomber
Torpedo Bombers: LAF-3M-16 Giodróg
Attack Aircraft: **Ironcastle Airworks Iarrean**, Ironcastle Airworks Sleanna
Reconnaissance and Maritime Patrol Aircraft: Shane Airworks Débheathach, Monarcha M-29 Prásóg, Shane Airworks Snámhán
Transport Planes: Shane Airworks Lódálaí

**Other Equipment**

**Artillery:** Gabha G-91 135mm Gun, Gabha G-23 76mm gun
**Anti-Aircraft Weapons:** Ceantar C-44 40mm AA Gun, Gabha G-36 20mm Gun, Gabha R-22 Machine Gun
**Torpedoes:** 533mm torpedoes, 450 mm aerial torpedoes (700 kg)
**Rockets:** Rocket Barrage Anti-Aircraft System
**Mines:** *Present and Accounted for*
**Radar:** *In Development*
**Sonar:** *Present and accounted for*

Also see: Naval Armament Program (1922) (ran out in 1937), Initial Equipment of the SDF-Navy, Auxiliary Freighter Group, Regiment of SDF-Navy Troopers, Maighdean-class Cruiser Proposal (abandoned by 1933), Equipment of the SDF-Army in 1940
Project 1940: Structure of the SDF-Navy in 1942, Structure of the Imperial 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
List of Kanmusu of the SDF-Navy