Yokosuka H5Y
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| H5Y | |
|---|---|
 Yokosuka H5Y Type 99 Flying Boat "Cherry" |
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| 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.
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[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
[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
- 3 x 7.7 mm machine guns,
- 2 x 250 kg (550 lb)bombs
[edit] References
[edit] Notes
[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
Related lists
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