R.Mikesh, A.Shorzoe Japanese Aircraft, 1910-1941 (Putnam)
Tetsusaburo Tsuzuku of Komagome, Hongo-ku, Tokyo, began his direct involvement in aviation with scale models. Between 30 January and 19 February, 1911, he made experiments with a one-tenth scale model aeroplane towed behind a car at the Yoyogi Military Parade Grounds in Tokyo. It was at Yoyogi the month before, that the first manned flight took place in Japan. His efforts led to a patent he applied for on 15 November, 1910, and which was granted on 4 December, 1911, as No.21147. This patent and aeroplane concept interested a Tokyo businessman, Reizo Yamashina, in organizing an association for building a full-size Tsuzuku Aeroplane.
Tsuzuku No.1 Aeroplane
With this financial support, a 50hp Anzani engine was bought from France and construction of the aeroplane begun. It was a Bleriot-type monoplane but with twin-pusher propellers having a drive system from the single engine much like that of the Wright brothers' aeroplane. The Tsuzuku aeroplane was completed in August 1911 and put on exhibition on 6 August at Takenodai, Ueno, Tokyo. Tsuzuku's theory was that a monoplane with pusher twin-propellers was the most efficient design for aeroplanes of the future.
The first attempts to fly this aeroplane took place at Tokorozawa on 13 March, 1912 . However, because of the loss through the transmission system, insufficient power was available to sustain flight, and the aeroplane could only make repeated hops. After adjustments were made to the chain-drive system, the aeroplane became airborne on 5 May, 1912, at Tokorozawa Airfield, making two circuits on the first flight. On that same day, a second flight resulted in four circuits and a height of 20 to 30m (65 to 100ft). That afternoon, Tsuzuku took off once again to circle the airfield, but at approximately 40ft he encountered a strong wind and felt it prudent to make an immediate landing. Children were playing in the area, and in making a very low turn to avoid them, he collided with a fence. He was thrown out of the aeroplane with slight injuries but the aeroplane was destroyed.
Single-engine, twin-pusher-propeller high-wing monoplane. Wooden structure with fabric-covered wings and empennage. Pilot in open structure.
One 50hp Anzani five-cylinder aircooled radial engine, driving two two-bladed wooden propellers.
Span 13m (42ft 8in); length 9.20m (30ft 2 1/4in); height 2.70m (8ft 10 1/4in); wing area 21sq m (226.04sq ft).
Empty weight 300kg (661Ib); loaded weight 450kg (992Ib).
One built in August 1911.