Yokosuka H5Y

From Wikipedia, the free encyclopedia

 This article or section is in need of attention from an expert on the subject.
Please help recruit one or improve this article yourself. See the talk page for details.
Please consider using {{Expert-subject}} to associate this request with a WikiProject
H5Y

Yokosuka H5Y Type 99 Flying Boat "Cherry"
Type Flying boat
Manufacturer Yokosuka
Maiden flight 1936
Introduced 1939
Primary user IJN Air Service
Produced 1938 - 1941
Number built 20

The Yokosuka H5Y (allied code name Cherry) was an Imperial Japanese Navy flying boat with a Japanese Navy designation of Type 99 Flying Boat (九九式飛行艇, 99shiki hikōtei). Only 20 were built between 1936 and 1941. Yokosuka arsenal contracted Dai-Juichi Kaigun Kokusho to perform the manufacturing.

Contents

[edit] Design and development

The H5Y was designed by Yokosuka to meet an Imperial Japanese Navy requirement for a twin engined maritime reconnaissance flying boat, which was intended to match the performance of contemporary four engined flying boats while being cheaper to build and easier to maintain. Two prototypes were built at the 11th Naval Arsenal, Hiro, being completed in 1936[1].

The H5Y was a twin engined parasol winged aircraft, and thus resembled a scaled down version of the Kawanishi H6K "Mavis". Performance was found to be poor however, with the aircraft underpowered and suffering from structural problems which delayed production [1][2].

[edit] Operational history

The H5Y was accepted for production in 1938 as the Type 99 Flying Boat, Model 11, production deliveries starting in 1939[1]. However, production was quickly cancelled owing to the poor performance, only 20 being built[3].

Although some were used for coastal anti submarine patrols early in World War II, they were quickly transferred to second line duties such as transport or training.[1]

[edit] Variants

Prototypes
2 examples constructed in Hiro Navy Arsenal
H5Y1 (Type 99 Navy Flying Boat, Model 11)
Production model, 18 built.

[edit] Operators

Flag of Japan Japan

[edit] Specifications (Yokosuka H5Y1)

Data from Warplanes of the Second World War, Volume Five: Flying Boats [1]

General characteristics

  • Crew: Six
  • Length: 20.53 m (67 ft 4 in)
  • Wingspan: 31.57 m (103 ft 7½in)
  • Height: 6.71 m (22 ft 0 in)
  • Wing area: 107.7 m² (1,159 ft²)
  • Empty weight: 7,070 kg (15,554 lb)
  • Max takeoff weight: 11,500 kg (25,353 lb)
  • Powerplant: 2× Mitsubishi MK1A Shinten-21 fourteen-cylinder air-cooled radials, 895 kW (1,200 hp) each

Performance

  • Maximum speed: 303 km/h (163 knots, 188 mph)
  • Range: 4,800 km (2,591 nm, 2,980 mi)
  • Service ceiling 5,200 m (17,000 ft)
  • Endurance: 26 hr
  • Climb to 3,000 m (9,850 ft): 24 min

Armament

[edit] References

[edit] Notes

  1. ^ a b c d e Green 1972, p. 136-137.
  2. ^ Francillon 1979, p. 495.
  3. ^ Donald, David (Editor) (1997). The Encyclopedia of World Aircraft. Aerospace Publishing. ISBN 1-85605-375-X. 

[edit] Bibliography

  • Francillon, René J. Japanese Aircraft of the Pacific War. London: Putnam & Company Ltd., 1970 (2nd edition 1979). ISBN 0-370-30251-6.
  • Green, William. Warplanes of the Second World War, Volume Five: Flying Boats. London: Macdonald & Co.(Publishers) Ltd., 1962 (5th impression 1972). ISBN 0-356-01449-5.

[edit] External links

[edit] See also

Wikimedia Commons has media related to:

Related lists

v • d • e
Japanese Navy Flying Boats designation series
H1H  • H2H  • H3H/H3K  • H4H  • H5Y  • H6K  • H7Y  • H8K  • H9A

HXC • HXD • HXP
v • d • e
Lists relating to aviation
General
Military
Accidents/incidents
Records
Image:Aero-stub img.svg  This article on an aircraft of the 1930s is a stub. You can help Wikipedia by expanding it.