H4H | |
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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.
Design and development[]
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.
Variants[]
- H4H1 (Hiro Navy Type 91 Model 1 Flying Boat)
- Variant powered by two 500hp (597kW) Hiro 91-1 engines.
- H4H2 (Hiro Navy Type 91 Model 2 Flying Boat)
- Variant powered by two 800hp (597kW) Myojo radial engines.
Operators[]
Specifications (H4H2)[]
Data from [1]
General characteristics
- Length: 54 ft 4¼ in (16.57 m)
- Wingspan: 76 ft 11½ in (23.46 m)
- Height: 20 ft 5 in (6.22 m)
- Wing area: 890.20 ft2 (82.70 m2)
- Empty weight: 10280 lb (4663 kg)
- Gross weight: 16534 lb (7500 kg)
- Powerplant: 2 × Myojo radial piston engine, 800 hp (597 kW) each
Performance
- Maximum speed: 145 mph (233 km/h)
- Range: 793 miles (1260 km)
- Service ceiling: 11880 ft (3620 m)
Armament
See also[]
References[]
Notes[]
Bibliography[]
- Illustrated Encyclopedia of Aircraft (Part Work 1982-1985). Orbis Publishing.
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The original article can be found at Hiro H4H and the edit history here.