Operators
Japan
| H4H | |
|---|---|
| Role | Patrol flying boat |
| National origin | Japan |
| Manufacturer | Hiro Naval Arsenal |
| First flight | 1931 |
| Introduction | 1933 |
| Primary user | IJN Air Service |
| Number built | 47 |
The Hiro H4H (or Hiro Navy Type 91 Flying Boat) was a 1930s Japanese bomber or reconnaissance monoplane flying boat designed and built by the Hiro Naval Arsenal for the Imperial Japanese Navy.
First appearing in 1931 the H4H1 was a twin-engined high-wing monoplane flying-boat. Powered by two 500 hp (597 kW) Hiro 91-1 engines strut-mounted above the wing it was produced by the Kawanishi company and entered service in 1933. [1]
An improved version of the design, the H4H2, followed into production two years later. The H4H2 has re-designed twin fins and rudders and was powered by two 800 hp (597 kW) Myojo radial engine. A total of 47 of both versions was produced. [1]
Both the H4H1 and H4H2 remained in front-line naval service through the 1930s.
Japan Data from [1]
General characteristics
Performance
Armament
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