Yokosuka K5Y


The Yokosuka K5Y was a two-seat unequal-span biplane trainer that served in the Imperial Japanese Navy during World War II. Due to its bright orange paint scheme, 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, Mitsubishi, Hitachi, First Naval Air Technical Arsenal, Nakajima, Nippon, and Fuji, 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 Amakaze 21A engine and the K5Y5 with a 384 kW Amakaze 15, were projected but never built.

Variants

;K5Y1:
;K5Y2:
;K5Y3:
;K5Y4:
;K5Y5: