Yokosuka K1Y

In April 1924, the headquarters of the Imperial Fleet of Japan Aviation ordered the development of a training aircraft in the 1st arsenal of the fleet ( Yokosuka ) to replace the obsolete Avro 504K . No specific figures were given in the performance characteristics, only the possibility of replacing the wheeled chassis with a float was stipulated. The aircraft project was ready by the end of 1924, but since the factory workshops of the arsenal had not yet been rebuilt after the earthquake of 1923, prototyping began only in the summer of 1925. By the end of the year, 2 prototypes and 4 pre-production vehicles were built. The tests were successful, and the aircraft was put into service under the name "" “Training seaplane marine Type 13“ ”” (or K1Y1 - option with a wheeled chassis and K1Y2 - option with a pop-gear landing gear).

Since the arsenal did not have production facilities for the release of the aircraft, the order was transferred to the Nakajima company, which shortly before this was founded by the former arsenal officer Chukuhei Nakajima.

Under the contract, until 1928, 40 aircraft were produced - 20 K1Y1 and 20 K1Y2. But this number did not satisfy the fleet, especially since the float version of the Yokosuka K2Y was unsuccessful. Therefore, an additional order was issued for the construction of a float version of K1Y1. Until 1933, 48 aircraft were manufactured at the Kawanishi plants, and in 1933-1934, Watanabe built another 10 aircraft.

The K1Y aircraft turned out to be a generally successful machine. The only problem was with the engine - the Japanese industry of the 1920s could not ensure the proper production quality of the German Benz Bz III engine, which was licensed under the name Gasuden Benz. But, despite this, the K1Y aircraft served until the outbreak of World War II. Many deducted vehicles were used as civilian vehicles.

The aircraft, developed under the leadership of Masasuke Hashimoto, was a single - engine biplane with linen sheathing and two open cockpits. The seaplane version, in addition to the two main floats, had a tail support float. Such a scheme for the mid-1920s was already obsolete.

• K1Y1 - option with wheeled chassis
• K1Y2 - option with float chassis

Specifications

• Crew : 2
• Length : 8.68 m
• Wing span: 10.21 m
• Height : 3.47 m
• Wing Area: 32.65 m²
• Wing profile:
• Empty weight: 872 kg
• Curb weight: 1 056 kg
• Normal take-off weight:
• Maximum take-off weight:
• Engine Gasuden Benz
• Power : 1x 130 HP ^[one]

Flight performance

• Maximum speed : 130 km / h
  • by the ground:
  • at a height of m:
• Cruising speed : 106 km / h
• Practical range:
• Practical ceiling :
• Rate of climb : m / s
• Wing load: kg / m² ^[1]

• Tadeusz Januszewski, Krzysztof Zalewski. Japońskie samoloty marynarki 1912-1945 ISBN 83-86776-50-1

• E1Y (unspecified) . Corner of the sky: aviation encyclopedia. Date of treatment April 3, 2016.