Jokosuka E1Y

Yokosuka E1Y – track version[/heading]
一四式水上偵察機 - Džúsan-shik suidžó teisacuki – Maritime reconnaissance seaplane type 14

Allied code name: unassigned
Japanese name: unknown

Version	Description
Navy Type 14-1 Reconnaissance Seaplane (E1Y1)	made 90 seaplanes, engine Lorraine Dietrich-1,
Navy Type 14-2 Reconnaissance Seaplane (E1Y2)	produced 128 seaplanes, engine Lorraine Dietrich-2
Navy Experimental Type 14-2 Kai-1 Reconnaissance Seaplane	one modified seaplane, experimental adjustments to the previous carrying
Navy Type 14-3 Reconnaissance Seaplane (E1Y3)	made 102 seaplanes, engine Lorraine Dietrich-3 and adjustments of the tail area
Navy Type 14 Modified Transport Seaplane	since 1932 the adjustment already made seaplanes for civilian airline Nippon Koku Yuso Kenkyusho (cabin for 4 passengers).

Manufacturer	production Period	Manufactured units
海軍航空廠"空技廠 "- Kaigun Gijutsu Kenkyusho, Yokosuka	01. 1926 – 1928	prototypes and serial E1Y1 and E1Y2, a total of 23 seaplanes
愛知時計電機株式会社, Aichi Tokei Denki Seizo Kabushiki Kaisha, Funataka	01. 1926 - 1931	serial E1Y1 and E1Y2, a total of 148 seaplanes
	01. 1931 - 1934	serial E1Y3, a total of 102 seaplanes
中島飛行機株式会社 - Nakajima Hikōki Kabushiki Kaisha, Koizumi	1928 - 1929	serial E1Y2, made 47 seaplanes
total	01. 1926 - 1934	320

sources:
Robert C. Mikesh and Shorzoe Abe, Japanese Aircraft 1910-1941, Naval Institute Press, London, 1990, ISBN: 1-155750-563-2
Tadeusz Januszewski and Kryzysztof Zalewski, Japońskie samoloty marynarski 1912-1945, volume 1., Lampart, year 2000, ISBN: 83-86776-50-1
Famous Airplanes of the World, the Imperial Japanese Navy Reconnaissance, Well. 47, Bunrindo Co. Ltd., year 1994/7, ISBN4-89319-044-X
author archive

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Brief history:


In 1921, the Yokosuka Naval Arsenal began developing a floatplane reconnaissance aircraft to replace the archaic Jokosuka Ro-Go Ko-Gata. However, Japan at that time did not yet have its own designers experienced in building aircraft, so it sought help from abroad. British colleagues at the Short Brothers factory helped the designers in Yokosuka. This collaboration resulted in a two-seat biplane that was powered by a Lorraine-Dietrich 1 V12 inline-fork engine with 400 horsepower.
Initially two prototypes were completed in 1923, which were designated by the Navy as reconnaissance seaplane type 10, it was soon discovered that the aircraft was heavily underpowered. Following these two prototypes, a slightly modified Type 10 Model A was built in 1923, but the flight characteristics were not much improved.
It was not until 1925 that the reconnaissance seaplane type 10 model B was built, for which the designers had already managed to solve the problems of the aircraft's heavy weight and considerable instability. It was still a matter of building prototypes and pre-series production of a few units, these aircraft were not included in the armament of the Naval Air Force.

In the meantime, the Imperial Navy in 1923 restated its new requirements for a reconnaissance seaplane, and the naval arsenal at Yokosuka used its Type 10 reconnaissance seaplane. However, the aircraft underwent major design modifications, in which the wingspan was reduced by more than two metres (2,170 mm) and the empty weight was reduced by 252 kg (1,000 lb). The new aircraft was finally accepted into the armament of the naval air force under the designation of Type 14 reconnaissance seaplane (it was the 14th year of Emperor Taisho's reign (1925)), officially on 27 January 1926. In 1928, a new designation of aircraft was introduced in the navy and the Type 14 was given the short designation E1Y1 - reconnaissance seaplane, produced as the first in the naval arsenal in Yokosuka. The aircraft had a take-off weight of over 2,000 kg and therefore this type could not be catapulted by the old types of catapults used on Imperial Navy warships. The Type 14 reconnaissance seaplanes therefore overwhelmingly took off directly from the sea surface next to the mother vessel. This situation was only solved by the introduction of a new type of ship's catapults.


Used versions:


Reconnaissance seaplane type 14 model 1 (later E1Y1), was accepted into service in 1926, reaching a take-off weight of 2,600 kg and was a two or three-seater aircraft. It was powered by the same engine as the original Type 10 reconnaissance seaplane - a 400 hp Lorraine-Dietrich 1 V12 inline engine.


The Reconnaissance Seaplane Type 14 Model 2 (later E1Y2), was introduced into service with little delay, and was always three-seater compared to the previous version. It was powered by a more powerful version of the Lorraine-Dietrich 2 engine, this engine had cylinders arranged in a W shape and produced 450 hp. Take-off weight was up to 2750 kg.


The Reconnaissance Seaplane Type 14 Model 3 (later E1Y3), was inducted into service on 28 January 1931, replacing both older versions from the following year. It was powered by a Lorraine-Dietrich 3 engine with a four-bladed propeller, the shape and area of the tail surfaces were changed and the aircraft performed better, and was produced by the Aichi Tonkem Denki factory. which delivered 102 aircraft.


The Type 14 Model 2 reconnaissance seaplane served to develop another type in 1928, designated the Yokosuka E5Y.


Sources used.
Robert C. Mikesh and Shorzoe Abe, Japanese Aircraft 1910-1941, Naval Institute Press, London, 1990, ISBN: 1-155750-563-2
Tadeusz Januszewski and Kryzysztof Zalewski, Japanese Naval Aircraft 1912-1945, vol. 1, Lampart, 2000, ISBN: 83-86776-50-1
author's archive