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Tokugawa Kaishiki No.1
Japan’s very first Japanese-designed and manufactured aeroplane was the Kaishiki No. 1 (kaishiichigouki, 会式一号機), pusher aeroplane (propeller is behind the pilot, pushing the craft, as opposed to the puller type we commonly have nowadays that leads the aircraft) which was designed and flown by Captain Tokugawa Yoshitoshi (surname first), on October 13, 1911 at Tokorozawa in Saitama-ken (Saitama Prefecture).
The motor and propeller came from France, but everything else came from or was built in Japan. The aircraft’s frame was mostly made from hinoki (Japanese cypress), and was covered by two layers of silk glued together with sounds like liquid rubber.
All attachment fittings, bracing wires and turn buckles were purchased from iron works companies or bought from local hardware shops.
Differences from the Farman III design included a reduced wing area, which gave it more speed. The aerofoil had a larger front curve which was thought to provide better lift. Other differences between the Kaishiki No. 1 and the Farman III include the fact that ailerons were on the upper wing only, and the tail was simplified by having a single horizontal tail surface.
As well, the engine and propeller were mounted higher than in the original design, and therefore the undercarriage could be shortened. A windshield was added for the pilot.
When the aeroplane was constructed, it was called the Tokugawa Type, but was later officially identified as Kaishiki No.1 Aeroplane.
The aeroplane was moved to the Army facility and flying field at Tokorozawa where it made its first flight on October 13, 1911, piloted by Captain Tokugawa.
Captain Tokugawa Yoshitoshi
A later test flight on October 25, 1911 achieved an altitude of 50 meters (164 feet), reaching a top speed of 72 kilometers per hour (45 miles per hour).
Further testing had it reach 85 meters (278 feet) in altitude and flying a grand distance of 1,600 meters (1 mile).
Continued testing convinced the flight crew that the propeller ground clearance wasn’t high enough, as the blades would hit the grass below, slowing it down, causing the Kaishiki No. 1 to lose power.
Actually, it was only after the providing greater clearance that the aircraft was given the Kaishiki No.1 moniker.
More changes ensued, including changeable landing skids in case one broke; twin rudders replaced by a single and larger rudder which was part of the advantage of the gained from the propeller slipstream meaning improved directional control.
Longer interplane struts on the aircraft were added to provide more spacing between the two wings.
One other alteration from the Kaishiki‘s original design was the removal of the pilot windshield, while it did provide protection from bug’s flying in the pilot’s mouth while screaming for joy as he flies through the air, the team felt that pilot needed to feel the air so as to get a better sense of the aeroplane’s speed.
Kaishiki No.1
Engine: 1 × Gnome Omega 7-cylinder, 50 horsepower
Propeller: 2-bladed wooden Chauvière
Length: 11.5 m (37 ft 9 in)
Upper wingspan: 10.5 m (34 ft 5 in)
Lower wingspan: 8.0 m (26 ft 3 in)
Height: 3.90 m (12 ft 10 in)
Wing area: 41.0 sq.m (441 sq.ft)
Empty weight: 450 kg (992 lb)
Gross weight: 550 kg (1,213 lb)
Maximum speed: 72 kph (45 mph)
Endurance: 3 hr
Crew: 2

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