Hi!
The Navy Type 10 Reconnaissance Seaplane
In 1921, the Yokosuka Navy Arsenal began designing a high-performance reconnaissance seaplane equipped with a 400hp class engine, which had higher performance than the Navy Type Yokosho Ro-Go-Ko gata reconnaissance seaplanet. The main person in the design group was Fletcher engineer at Short Company, who was visiting Japan at the time. This plane adopted a long-step type float, which was the first abolition of the tail float in Japan. Two prototypes were completed in 1923, but they were too heavy and not practical. The design was reviewed in 1924, and the A type was manufactured.
The A-type had slightly better performance than the prototype, but was not officially adopted. In 1925, the B type with reduced weight and improved stability was manufactured and showed good results, but it was not mass produced,too.
Engine : Lorraine water cooled V12, Nominal power : 400hp/1800r.p.m/S.L.
Span : 16. 882m ~ 16. 164m, Length : 12. 167m~11. 77m
Height : 4. 244m ~ 4. 308m, Wing Area : 74. 3m 2~66. 0m2
Empty Weight : 1920kg ~ 1912kg, Gross Weight : 3010kg ~ 2878kg
Maximum Speed : 79kt ~ 85kt, Time to altitude : 2500m/1hr, Endurance : 12. 5hr
Source : ENCYCLOPEDIA OF JAPANESE AIRCRAFT VOL.2 AICHI KUGISHO CONTENTS.