Jokosuka H5Y [Cherry]

Jokosuka H5Y - přehled verzí

Yokosuka H5Y - track version[/heading]
空技廠 九九式飛行艇 - Kūgishō kyū kyū shiki hikōtei - Yokosuka Navy Type 99 Flying Boat

Allied reporting name: "Cherry"


Label the Design of the aeroplane - a description
Yokosuka H5Y1 11 the first two prototypes, which was with rebukes accepted into armaments
Yokosuka H5Y2 12 mass-produced machines with slightly prolonged and reinforced hull



Manufacturer production Period Manufactured units
広海軍工廠 - Hiro Kaigun Kōshō (Hiroshō), Hiro (Hiro Naval Arsenal) 1936 2 prototypes H5Y1 intended for testing
第十一海軍航空廠 - Dai-Jūichi Kaigun Kōkū-shō (11th Naval Air Arsenal), Hiro 1939 – 1941 16 serial aircraft H5Y2
川西航空機株式会社 – Kawanishi Kōkūki Kabushiki Kaisha, Nauro 1941 2 serial aircraft H5Y2


sources:
René J. Francillon Ph. d., Japanese Aircraft of the Pacific War, Naval Institute Press, Annapolis Maryland, Reprinted 1990, ISBN-0-87021-313-X
William Green, Warplanes of the Second World War, Volume Five: Flying Boats, London, Macdonald & Co.(Publishers) Ltd., 1962, Revised and reprinted 1968, pp. 136-137, ISBN 356-01449-5.
Tadeusz Januszewski and Kryzysztof Zalewski, Japońskie samoloty marynarski 1912-1945, tiel 2, Lampart, 2000, ISBN 83-86776-00-05
http://www.combinedfleet.com/ijna/h5y.htm
http://www.airwar.ru/enc/sww2/h5y.html
http://military.sakura.ne.jp/ac/h5y.htm
author archive
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Yokosuka H5Y


空技廠 九九式飛行艇 - Kūgishō kyū kyū shiki hikōtei - Yokosuka Navy Type 99 Flying Boat

Allied reporting name: "Cherry"

History:
Japanese naval air force (海軍航空本部 - Kaigun Kōkū Hombu) in February 1934 lists the specifications of the development plan marked the 9-Shi, there have been formulated the technical conditions and requirements for the new aircraft, which the navy for the products of aviation technology was required. Kaigun Kōkū Hombu at the time requested by the following categories of aircraft:
on-board fighter aircraft – projects A5M1 and A5N1
on-board torpedo bomber – projects B4M1, B4N1 and B4Y1
ground attack bomber – there is a project G3M
a small reconnaissance float plane – there is a project E9W1
night reconnaissance float plane – projects E10A1 and E10K1
recon big flying boat – there is a project H6K
exploratory medium flying boat – there is a project H5Y

I have noted that the Japanese designation they had no idea between the float plane and the flying boat, so the label float plane and flying boat I used the rather for our easier reference, the Japanese have been using for more resolution then the size of the aeroplane, or the number of crew members.

Of the project to the latter the desired category, then in the middle a flying boat took 第一海軍航空技術廠 - the Dai-Ichi Kaigun Kōkū Gijutsu-shō or - 1. naval air technical arsenal in Jokosuce. The design team here drove 海軍少佐 - Kaigun-shōsa (Lt Cdr) - Jun Okamura, who has previously worked on the flying boats Hiro H3H1 and H4H. The newly designed plane is very similar to your greater současníku flying boat Kawanishi H6K Mavis. The aircraft was designed as an all-metal high-wing, the wing carried on struts above the fuselage, the form with the H6K was almost perfect, the most fundamental difference was in the number of engines, the big seaplane was powered by four engines, whereas the Okamurův the project counted with a two-drive čtrnáctiválcových engines Mitsubishi MK1A Shinten, each with an output of 1 200 hp. The engines were stored in the midsection of the wings away from each other. The submitted project was the navy approved, and was subsequently commissioned the construction of the two prototypes. Both prototypes were built in another maritime arsenal, this time in the Hiru (広海軍工廠 - Hiro Kaigun Kōshō (Hiroshō)), I couldn't figure out whether the chief designer Okamura to Hiro followed his project, or whether the project followed Okamuru. But it is certain that in 1936 they were both prototypes built, and without delay commenced their exams.

Completed prototypes didn't look at all bad, on the contrary, one could say that they were greatly elegant, but it ended with good news, the performances were weak and remained far behind the requirements of the Kaigun Kōkū Hombu, the culprit was the insufficient performance of both the consumed engine and the seaplane was podmotorovaný. Good were neither nautical characteristics of the ship hull and, moreover, its structure had considerable difficulties with structural strength. Kaigun Kōkū Hombu, despite considerable reservations, adopted the seaplane in their equipment under the shortened designation of H5Y1 11, but the Japanese more often use the full designation - "Flying boat Type 99 Model 11". The imperial naval air force, however, has pushed through some adjustments, when commissioned the construction of the additional eighteen machines. In an effort to improve the nautical and structural properties was slightly lengthened hull, the empty weight of the machine carried out the modifications increased by less than 300 kilograms, therefore, was humiliated payload. The modified aircraft was designated as H5Y2 12 and kidnapped two dvěstěpadesátikilové bombs, or four bombs half the caliber, the weapons were formed by couple of machine guns type 97 rifle caliber. One machine gun was in the front part of the trunk and shot out of the side windows, the other was in the gun turret under the elevator, some aircraft carried a third gun of the same type, that was in a large glazed cabin. The crew of the aircraft was six. Performances remain almost unchanged, i.e., the weak, the decent was the flight endurance, the aircraft endured in the air for 26 hours and could fly at a maximum distance of 4 700 km. It points to the protiponorkovému patrol, this task fulfills several seaplanes and then carried four depth charges. Because engineers failed to increase performance, other machines of this type have already Kaigun Kōkū Hombu commissioned this. The last flying boats the navy took over in 1941, when it was their production discontinued, relatively soon, however, came into the druholiniové service and used primarily for Takuma Kōkūtai as a transport or for training of new crews, before they were replaced by more powerful čtyřmotorovými Kawanishi H6K Mavis. One aircraft was used for weather survey, with the civilian registration J-AAMG.

The allied intelligence service, this machine has allocated the code name Cherry and wrongly of him assumed that it is used in much greater numbers.

sources:
René J. Francillon Ph. d., Japanese Aircraft of the Pacific War, Naval Institute Press, Annapolis Maryland, Reprinted 1990, ISBN-0-87021-313-X
William Green, Warplanes of the Second World War, Volume Five: Flying Boats, London, Macdonald & Co.(Publishers) Ltd., 1962, Revised and reprinted 1968, pp. 136-137, ISBN 356-01449-5.
Robert C. Mikesh and Shorzoe Abe, Japanese Aircraft 1910-1941, Annapolis, Naval Institute Press, 1990, ISBN 1-55750-563-2.
Tadeusz Januszewski and Kryzysztof Zalewski, Japońskie samoloty marynarski 1912-1945, tiel 2, Lampart, 2000, ISBN 83-86776-00-05
http://www.airwar.ru/enc/sww2/h5y.html
author archive
.
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