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Yokosuka K5Y

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Yokosuka K5Y

Yokosuka K5Y
K5Y1
Role Intermediate trainer
Manufacturer Various, see text
First flight 1933
Introduction 1934
Primary user Imperial Japanese Navy Air Service
Produced 1934-1945
Number built 5,770

The Yokosuka K5Y was a two-seat unequal-span biplane trainer (Allied reporting name: "Willow") that served in the Imperial Japanese Navy during World War II. Due to its bright orange paint scheme (applied to all Japanese military trainers for visibility), it earned the nickname "aka-tombo", or "red dragonfly", after a type of insect common throughout Japan. A K5Y of the Kamikaze Special Attack Corps 3rd Ryuko Squadron was credited with sinking the destroyer USS Callaghan on July 29, 1945, the last US warship lost to kamikaze attack during the war.

Design and development

The aircraft was based on the Yokosuka Navy Type 91 Intermediate Trainer, but stability problems led to a redesign by Kawanishi in 1933. It entered service in 1934 as Navy Type 93 Intermediate Trainer K5Y1 with fixed tail-skid landing gear, and remained in use throughout the war. Floatplane types K5Y2 and K5Y3 were also produced. After the initial 60 examples by Kawanishi, production was continued by Watanabe (556 aircraft built), Mitsubishi (60), Hitachi (1,393), First Naval Air Technical Arsenal (75), Nakajima (24), Nippon (2,733), and Fuji (896), for a total of 5,770. These aircraft were the mainstay of Imperial Japanese Navy Air Service's flight training, and as intermediate trainers, they were capable of performing demanding aerobatic maneuvers. Two further land-based versions, the K5Y4 with a 358 kW (480 hp) Amakaze 21A engine and the K5Y5 with a 384 kW (515 hp) Amakaze 15, were projected but never built.[1]

Variants

K5Y2
K5Y1
K5Y2
  • Floatplane version, with Amakaze 11 engine.
K5Y3
  • Floatplane, with 384 kW (515 hp) Amakaze 21.
K5Y4
  • Projected land-based version with 358 kW (480 hp) Amakaze 21A. Never built.
K5Y5
  • Projected land-based version with 384 kW (515 hp) Amakaze 15. Never built.

Operators

 Japan

Postwar

  • Indonesian People's Security Force (the precursor of Indonesian Air Force) operated derelict aircraft against Dutch colonial rule. On 29 July 1947, Indonesia beside using Guntei and Planned,Hayabusa.Indonesia also use 2 units Yokosuka K5Y(Called "Cureng/Churen" by Indonesian fighters) from Maguwo Air Force Base, Yogyakarta for bombing Dutch strategic positions in Ambarawa, Salatiga and Semarang. It is currently on display at Jakarta.

Specifications (K5Y1)

Data from Japanese Aircraft of the Pacific War[2]

General characteristics

Performance

Armament
  • Guns: 1× fixed, forward-firing 7.7 mm (.303 in) Type 89 machine gun and 1× flexible, rearward-firing 7.7 mm (.303 in) Type 92 machine gun
  • Bombs: Up to 100 kg (220 lb) of bombs on external racks

See also

Aircraft of comparable role, configuration and era

References

Notes
  1. ^ Francillon 1979, p. 446.
  2. ^ Francillon 1979, p. 448.
Bibliography
  • Collier, Basil. Japanese Aircraft of World War II. London: Sidgwick & Jackson, 1979. ISBN 0-283-98399-X.
  • Francillon, R.J. Japanese Aircraft of the Pacific War. London: Putnam & Company Ltd., 1970 (2nd edition 1979). ISBN 0-370-30251-6.
  • Mondey, David. The Concise Guide to Axis Aircraft of World War II. London: Chancellor Press, 1996. ISBN 1-85152-966-7.
  • Tagaya, Osamu. Imperial Japanese Naval Aviator, 1937-45. Botley, Oxfordshire, UK: Osprey Publishing, 2003. ISBN 1-84176-385-3.

External links

  • http://www.combinedfleet.com/ijna/k5y.htm
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