Yokosuka K5Y

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 九三式中間練習機 (Yokosuka K5Y kuusanshikichuukanrenshuuki) 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
K5Y3
K5Y4
K5Y5

Operators

 Japan

Postwar

A replica of a Yokosuka K5Y trainer at the Kawaguchiko Motor Museum, Yamanashi prefecture, Japan

Specifications (K5Y1)

Data from Japanese Aircraft of the Pacific War[2]

General characteristics

Performance

Armament

See also

Aircraft of comparable role, configuration and era

References

Notes
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.
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