Tuesday, March 3, 2015
Yokosuka Navy 1-go Experimental Submarine-borne Reconnaissance Seaplane.
The Japanese Navy had a strong interest in the use of submarine-borne reconnaissance seaplanes, and one of several designs for this type was begun at the Yokosuka Naval Arsenal in 1925, based on a Heinkel U 1 submarine-borne seaplane designed by Carl Caspar, former owner of the Hanseatischen Flugzweugwerke in Germany. One of these aircraft, better known as the Caspar U 1, had been imported in 1923 and the Yokosho design was a near duplicate in layout and dimensions.
This Yokosho design was a cantilever biplane having one-piece upper and lower wings without interplane struts. The structure was of metal and wood, with light metal fuselage skinning and the wings were fabric covered. The twin-floats and wings were detachable from the fuselage and these components could be stowed in a tubelike hangar 7.4 m (24.7 ft) long and 1.7 m (5.5 ft) in diameter. The aircraft could be assembled in 4 min by 5 mechanics and became airborne in a total of 15 to 16 min. Dismantling was accomplished in 2 min by five mechanics.
Completed in 1927, this was the smallest aircraft in Japan. Although small, it was a rugged aircraft of good design with light-weight metal skinning. During 1927-28 it was tested aboard the submarine I-21 which was equipped with a hangar for this purpose, but the aircraft was not developed further. The experience gained with this project was useful in the later development of the Yokosho 2-go Reconnaissance Seaplane. Similar research at this time was being conducted in the United States and Great Britain, but none of the projects were developed to an operational level.
Manufacturer: Yokosuka Kaigun Ko-sho (Yokosuka Naval Arsenal).
Type: Single-engined carrier-borne reconnaissance seaplane.
Crew (1): Pilot in open cockpit.
Powerplant: One 80 hp Gasuden-built Le Rhone nine-cylinder rotary engine, driving a four-blade wooden propeller.
Dimensions: Span 7.20 m (23 ft 7 1/2 in); length 6.205 m (20 ft 4 1/4 in); height 2.39 m (7 ft 10 in); wing area 15.2 sq m (163.616 sq ft).
Weights: Empty 400 kg (881 lb); loaded 520 kg (1,146 lb); wing loading 34.2 kg/sq m (7 lb/sq ft); power loading 6.5 kg/hp (14.3 lb/hp).
Performance: Maximum speed 83 kt (95.57 mph); endurance 2 hr.
Production: A total of 1 1-go prototype was built by Yokosuka Kaigun Ko-sho in 1927.