TheYokosuka K1Y, also known as theNavy Type 13 Trainer, was a Japanese single-enginedbiplanetrainer of the 1920s. Designed by the Japanese Navy Arsenal atYokosuka, over 100 were built by several manufacturers and was used by theImperial Japanese Navy well into the 1930s.
In 1924, theYokosuka Naval Air Technical Arsenal was tasked with designing a replacement for the Imperial Japanese Navy'sYokosuka I-go Ko-gata andAvro 504floatplane trainers. The resultant design was a single-engined two-bay biplane of fabric-covered wooden construction. It was powered by a Gasuden-built 130 horsepower (97 kW) Benz six-cylinder water cooledinline engine and could be fitted with either aconventional landing gear or floats. It first flew in 1925 and was accepted into service as theNavy Type 13 Trainer,[nb 1] with theshort system designation E1Y.[2]
After acceptance in October 1925, about forty were built byNakajima,[3] with forty-eight more built byKawanishi from 1928-32,[4] and ten byWatanabe in 1933–34, which, together with six aircraft built by Yokosuka, gave a total of about 104.[2] The type remained the standard floatplane trainer of the Imperial Japanese Navy until it was replaced by theYokosuka K4Y from 1933,[5] although a few remained in use until the early years of theSecond World War.[2]
1 X as second letter is for experimental aircraft or imported technology demonstrators not intended for service,2 Hyphenated trailing letter (-J, -K, -L, -N or -S) denotes design modified for secondary role,3 Possibly incorrect designation, but used in many sources
