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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.

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

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


 Japan

Specifications (H4H2)


Data from [1]

General characteristics

Performance

Armament


See also


Related lists


References



Notes


  1. Orbis 1985, p 2173

Bibliography



На других языках


- [en] Hiro H4H

[it] Hiro H4H

L'Hiro H4H, indicato anche come Idrovolante per la Marina Tipo 91 (九一式飛行艇?) in base alle convenzioni allora vigenti, fu un idrovolante a scafo centrale, bimotore monoplano ad ala alta, sviluppato in Giappone dall'ufficio tecnico dell'Undicesimo Arsenale Tecnico Aeronavale di Hiro nei primi anni trenta.

[ru] Hiro H4H

Hiro H4H (яп. 九一式飛行艇, летающая лодка морская Тип 91) — серийная летающая лодка Имперского флота Японии 30-х годов 20 века.



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