The Avro Type D was an aircraft built in 1911 by the pioneer British aircraft designer A.V. Roe. Roe had previously built and flown several aircraft at Brooklands, most being tractor layout triplanes. The Type D was his first biplane.
The Kawasaki KDC-2 was a 1920s Japanese light civil transport which Kawasaki developed from its Kawasaki Army Type 88 Reconnaissance Aircraft. Two were built and flown in 1928 and flew both regular and irregular services; the last retired in 1935.
The Fokker C.VIII was a reconnaissance aircraft built in the Netherlands in the late 1920s. Intended primarily for the photographic reconnaissance role, it was a larger machine than other Fokker reconnaissance types of the period, with space for a third crew member, who acted as camera operator. It was also Fokker's first aircraft of this type to be built as a monoplane, a parasol wing configuration. The construction, however, was in the familiar Fokker style with wooden wings covered with plywood and fabric, and a steel-tube fuselage, also fabric-covered.
The Heinkel HD 25 was a two-seat shipboard biplane reconnaissance floatplane developed in Germany during the 1920s for production in Japan.
The Nakajima P-1 was a 1930s Japanese single engine, single seat biplane intended for night mail flights, derived from the Nakajima E4N3 Naval reconnaissance seaplane. Nine were built.
The Aichi F1A was a prototype Japanese floatplane of the 1930s. A single-engined biplane, the F1A was intended as a short-range observation aircraft suitable for operation off the Imperial Japanese navy's warships, but only two were built, the Mitsubishi F1M being selected instead.
The Mitsubishi MC-1 was a 1920s Japanese single-engined biplane airliner designed and built by the Mitsubishi Aircraft Company.
The Caproni Ca.125 was a single-engine, tandem two-seat, touring biplane built in Italy in 1933. It could be operated either as a landplane or seaplane.
The Caudron C.39 was a French three-engined biplane with a cabin for six passengers when the aircraft was equipped as a landplane or four passengers when on floats. It was flown with some success in competitions in 1920 and 1921.
The SET 2 or Proto-SET 2 was a 1920s Romanian prototype reconnaissance and day-bomber aircraft.
The Potez 24 A.2 was a mid-1920s French biplane intended to replace the Potez 15 as an army observation aircraft. The further improved and larger Potez 25 was preferred for production.
The Dewoitine 14 was a mid-1920s French civil transport, capable of carrying mixture of passengers and freight. The sole example was used in commercial trials.
The Tokyo Koku Aiba-Tsubame or Tokyo Aviation Aiba-Swallow was a 1930s Japanese civil transport with seats for three passengers. It was intended to be cheap to produce so, although its fuselage was a new design, its wings and undercarriage were those of another Japanese aircraft. Two were built and flew taxi services and joyrides.
The Tokyo Koku Aiba 11 was a 1940s Japanese civil transport aircraft derived from the Tokyo Koku Aiba 10 trainer. Its cabin accommodated three passengers on taxi or sight-seeing flights. Though well-regarded, developing military demands prevented its production.
The Kawanishi K-6 was a passenger-carrying biplane floatplane, built in Japan in the 1920s. The sole example took part in an around Japan flight then flew as a transport with Japan Aviation.
The Kawanishi K-3 was a Japanese, fast, multi-purpose civil transport aircraft from the early 1920s. Despite its good performance it was eclipsed by the release of Army surplus machines and only one was built.
The Itoh Emi 3 was the first Japanese civil passenger carrying seaplane, flown in 1917 and used for commercial demonstrations and passenger flights.
The Itoh Emi 29 Taihoku-go was a 1920s Japanese civil transport with its two passengers in a enclosed cabin. It was the first of this "limousine" type to be built in Japan; the only example flew the Osaka-Tokyo route for a while.
The Itoh Emi 30 was a small, single-engined, sports biplane built in Japan in 1922. Though it attracted attention by being the smallest Japanese aircraft of its time, the sole example was mostly used as an aerobatics trainer.
The Huff-Daland HD.8A was a small civil transport biplane carrying two passengers built in the U.S. in 1922. The otherwise identical HD-9A offered an alternative engine.
