Flight, July 1931
A JAPANESE LIGHT AIRCRAFT
THE Ishikawajima Aircraft Company have produced a two-seater single bay light aircraft somewhat reminiscent of the Moth and Avian called the R.3. This will be fitted with either the Cirrus III or Hermes II engines,
for both of which the same Company hold the manufacturing rights.
The chief designer, who is Mr. Yoshihara, claims that particular attention has been paid to high factors of safety, performance, exceptional flying qualities and low maintenance costs.
The machine is said to possess remarkable manoeuvrability, while the controls are so effective that any type of aerobatic evolution can be managed with ease. The take-off has received particular attention, since in Japan, landing fields, when existent at all, are of a very limited size.
During the next Spring the Tokio Student Union have arranged to send someone on a production model R.3 to Europe via Siberia. The proposed route being from Tokio via Siberia to Poland, Berlin, Brussels, London, Berlin and finishing in Rome.
Constructional Details. - The fuselage is built up of welded steel tubing and is wire braced, particular care having been taken that both pilot and passenger have ample cockpit space together with exceptional leg room. The engine mounting is attached to the fuselage by four bolts only, and is built up from Duralumin channels reinforced by a curved Duralumin plate underneath the engine, which also serves as cowling. The wings are all wood construction, with a three-ply leading edge, and are fabric-covered. The spars are all boxed spruce and three-ply. The ply leading edge is somewhat different to that usually used in this country, since it is also extended back underneath the wing to the bottom of the rear spar with fabric over it.
A patent held by the Ishikawajima Aircraft Co. also arranges that the aileron hinge points are fitted in such a manner which it is claimed, compensates for yaw and reduces rudder movement necessary in turning. The ailerons themselves are very light and are constructed of duralumin channel. The interplane struts are streamline steel tubing.
All tail surfaces are similarly constructed of Duralumin channel, and, though very light, are extremely rigid and well braced by tubular steel struts of streamline cross section. The landing gear uses oil and rubber discs in compression for shock absorbtion, and is of the open type without a cross axle. The tail skid is steerable and sprung with rubber discs in compression. The fuel supply is direct by gravity from two 14-gall. tanks of aluminium in the upper centre section.