Hiro H4H
{{Short description|Japanese flying boat}}
| {{Infobox Aircraft Begin
|name = H4H |image = Hiro Tipo 91 H4H-1.jpg |caption = }}{{Infobox Aircraft Type |type = Patrol flying boat |national origin=Japan |manufacturer = Hiro Naval Arsenal |designer = |first flight = 1931 |introduced = 1933 |retired = |status = |primary user = IJN Air Service |more users = |produced = |number built = 47 |unit cost = |variants with their own articles = }} |
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.
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 engines. A total of 47 of both versions was produced.
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
;{{JPN}}
Specifications (H4H2)
{{Aircraft specs
|ref=Orbis 1985, p 2173
|prime units? = imp
|length m=16.57
|length ft=54
|length in=4.25
|span m=23.46
|span ft=76
|span in=11.5
|height m=6.22
|height ft=20
|height in=5
|wing area sqm=82.70
|wing area sqft=890.20
|empty weight kg=4663
|empty weight lb=10280
|gross weight kg=7500
|gross weight lb=16534
|eng1 number=2
|eng1 name=Myojo radial piston engine
|eng1 kw=597
|eng1 hp=800
|max speed kmh=233
|max speed mph=145
|range km=1260
|range miles=793
|ceiling m=3620
|ceiling ft=11880
|armament = *1 × 7.7mm (0.303in) Machine Gun (mounted over bow cockpit)
- 2 × 7.7mm (0.303in) Machine Guns (mounted over midship cockpit)
- 2 × 250kg (551lb) bombs
}}
See also
{{aircontent|
|related=
|similar aircraft=
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References
{{Reflist}}
=Bibliography=
{{refbegin}}
- {{cite book|title=Illustrated Encyclopedia of Aircraft (Part Work 1982-1985)|publisher= Orbis Publishing}}
{{refend}}
External links
{{Commons category}}
{{Hiro Naval Arsenal}}
{{Japanese Navy short aircraft designations}}