The Hiro Naval Arsenal (''Hiro Kaigun Kōshō'' or ''Dai-Jūichi Kaigun Kōkū-shō'' (11th Naval Arsenal), often abbreviated as ''Hiroshō'') at Kure (呉), Hiroshima prefecture, was a production facility for

seaplane A seaplane is a powered fixed-wing aircraft capable of takeoff, taking off and water landing, landing (alighting) on water.Gunston, "The Cambridge Aerospace Dictionary", 2009. Seaplanes are usually divided into two categories based on their tech ...

flying boat A flying boat is a type of seaplane with a hull, allowing it to land on water. It differs from a floatplane in having a fuselage that is purpose-designed for flotation, while floatplanes rely on fuselage-mounted floats for buoyancy. Though ...

s, and aero engines for the

Imperial Japanese Navy The Imperial Japanese Navy (IJN; Kyūjitai: Shinjitai: ' 'Navy of the Greater Japanese Empire', or ''Nippon Kaigun'', 'Japanese Navy') was the navy of the Empire of Japan from 1868 to 1945, Potsdam Declaration, when it was dissolved followin ...

before and during

World War II World War II or the Second World War (1 September 1939 – 2 September 1945) was a World war, global conflict between two coalitions: the Allies of World War II, Allies and the Axis powers. World War II by country, Nearly all of the wo ...

. It was largely destroyed in a raid by

B-29 Superfortress The Boeing B-29 Superfortress is a retired American four-engined Propeller (aeronautics), propeller-driven heavy bomber, designed by Boeing and flown primarily by the United States during World War II and the Korean War. Named in allusion to ...

es on 5 May 1945.

Aircraft

Designed and produced: * Hiro G2H - long-range bomber *

Hiro H1H The Hiro H1H (or Navy Type 15) was a 1920s Japanese bomber or reconnaissance biplane flying boat developed from the Felixstowe F.5 by the Hiro Naval Arsenal for the Imperial Japanese Navy. The aircraft were built by Hiro, the Yokosuka Naval Ar ...

- biplane flying boat developed from the Felixstowe F.5 *

Hiro H2H The Hiro H2H, or "Navy Type 89 Flying boat" (), was a Japanese patrol flying boat of the 1930s. Designed and built by the Hiro Naval Arsenal, it was a twin-engined biplane that was operated by the Imperial Japanese Navy. Design and development ...

- biplane flying boat developed from the Supermarine Southampton II * Hiro H4H - flying boat Prototypes and experimental aircraft: * Hiro R-3 - flying boat, 1 example built * Hiro H3H1 - flying boat, 1 example built * Hiro H10H - project only, never completed Aircraft designed by other manufacturers produced at Hiro: * Yokosuka B3Y * Nakajima B5N "Kate" * Aichi E13A "Jake" * Yokosuka D4Y "Judy"

Engines

* Hiro Type 14 * Hiro Type 61 * Hiro Type 91 *

Hiro Type 94 The Type 94 900 hp liquid-cooled in-line was a W-18 liquid-cooled aircraft engine. Two Type 94 engines were used to power the Imperial Japanese Navy Hiro G2H land-based bomber in 1933. The Type 94 engine was the eighteen-cylinder version o ...

References

* {{Authority control Defunct aircraft manufacturers of Japan Defunct aircraft engine manufacturers of Japan History of Hiroshima Prefecture Imperial Japanese Navy arsenals