Hiro H4H

Hiro H4H / 広廠 H4H・九一式飛行艇

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Hiro H4H - an overview of the versions

九一式飛行艇 – Hiro maritime reconnaissance flying boat type 91

Allied code name: unassigned
Japanese name: ?

Label	the Design of the aeroplane - a description
Hiro H4H1	built 2 aircraft, engines Hiro Type 91
Hiro H4H2	produced 45 aircraft, engines Myojo 1

Manufacturer	production Period	Manufactured units
Dai-Junichi Kaigun Kokusho, Hiro, Kure	1934 – 1934	2 prototypes H4H1
	1933 – 1937	28 serial aircraft H4H2
Kawanishi Kokuki Kabushiki Kaisha, Nauro	06. 1933 - 1936	17 serial aircraft H4H2

sources:
Tadashi Nozawa, Encyclopedia of Japanese Aircraft 1900-1945, Vol.3. Kawanishi, Yokosuka Aircraft. Tokyo, Shuppan Kyōdōsha (出版協同社), 1981
Tadeusz Januszewski and Kryzysztof Zalewski, Japońskie samoloty marynarski 1912-1945, tiel 2, Lampart, 2000, ISBN 83-86776-00-05
author archive .

URL : https://www.valka.cz/Hiro-H4H-t33664#122655 Version : 0

History:
In 1931, at a time when it was tested třímotorový seaplane H3H1, enacted by the Kaigun Koku Hombu naval arsenals of Hirosho Dai-Juichi Kaigun Kokusho), to begin with the development of a twin-engined flying boat, which would replace the already obstarožně-looking Hiro H2H1 Type 89. Chief designer ing. Jun Okamura designed a modern interpretation of an all-metal monoplane powered by inline engines Hiro type 91-1. The development of the aeroplane, however, was disproportionately long (from 1931 until 1937), we can say that this type of vyvijel throughout the production. Kaigun Koku Hombu in 1937, the ministry issued specifications for a 9-Shi, that requested a replacement H4H Type 91. During the whole development, designers tried to achieve the best flight and navigational features, and so it was achieved that produced the aircraft was in its essence označitelná: "what a piece of - it original“.
Version H4H2 used star devítiválce with higher performance and reliability, but smaller výškovostí. The production also engaged the company Kawanishi Kokuki K. To., it delivered its first aircraft on 16. 06. 1933. Navy flying boats H4H both versions used during the war with China to patrol and to transport the mail from China to Japan and vice versa. At the time of the outbreak of war these aircraft were already very outdated.

sources:
Robert C. Mikesh and Shorzoe Abe, Japanese Aircraft 1910-1941, Naval Institute Press Annapolis, Maryland 21402, 1990, ISBN: 1-155750-563-2
Tadeusz Januszewski and Kryzysztof Zalewski, Japońskie samoloty marynarski 1912-1945, tiel 2, Lampart, 2000, ISBN 83-86776-00-05
author archive.

URL : https://www.valka.cz/Hiro-H4H-t33664#122657 Version : 0

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Hiro H4H

51 - Letadlo / Airplane

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