The Bartel BM.4 was a Polish biplane primary trainer aircraft used from 1929 to 1939 by the Polish Air Force and Polish civilian aviation, manufactured in the Samolot factory in Poznań. It was the first plane of Polish design put into production.
The de Havilland DH.42 Dormouse and its two variants the de Havilland DH.42A Dingo I and II were two-seat single-engined biplanes designed for fighter-reconnaissance and army cooperation roles. They did not achieve production.
The Fairey G.4/31 was a British single-engined, two-seat biplane contender for an Air Ministry specification for a multi-role or general purpose aircraft. Unsuccessful, only one was built.
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 Perry Beadle T.1 was a single-seat, single engine biplane built and flown in the United Kingdom in 1913. In 1914 it flew with a more powerful engine and other modifications as the Perry Beadle T.2, which was acquired by the Royal Navy Air Service at the outbreak of World War I.
The Hispano-Suiza E-34, later renamed Hispano HS-34, was a Spanish single engine, tandem seat biplane, designed as a basic trainer. Twenty five were ordered by the Aeronáutica Naval, but only five had been completed when the Spanish Civil War intervened.
The Morane-Saulnier MS.341 was a single engine parasol wing training and touring aircraft built in France in the mid-1930s. It had two open cockpits in tandem and was sold to private owners, clubs and the Armée de l'Air.
The Pander P-1 and P-2 were close to-identical single engine Dutch sports aircraft with tandem seats and a parasol wing, first flying in 1929. Only two were built.
The Koolhoven F.K.47 was a 1930s one-off two seat biplane designed and built in the Netherlands for an individual customer as a sport and touring aircraft.
The Gerner G.I or Gerner G I, was a small, low powered, two seat biplane of steel tube construction, built in Germany in 1928. Only one was produced but the design led to the more successful Gerner G II R.
The Potez VIII was a French training aircraft which first flew in 1920. Originally it had a very unusual vertical inline engine and a four-wheeled undercarriage, though the production version was more conventional.
The Bloch MB.90 was the first all-metal French light aircraft. Only two aircraft were completed, making their first flights in 1932, though there were several variants.
The Caudron Type O was a French single seat air racing biplane first flown in 1914.
The Caudron Types M and N were small, fast French sports monoplanes, flown 1911–13 under a wide range of engine powers. There was also a military version.
The Caudron Type B was a 1911 development of the earliest Caudron type, the Caudron Type A, with a nacelle style fuselage and more powerful engine. Initially an equal span biplane, it was modified into a sesquiplane.
The Caudron Type B Multiplace was a large French biplane designed to carry up to five passengers in a cross-country time trial of 1912. It was destroyed early in the event.
The Caudron Type D was a French pre-World War I single seat, twin-boom tractor biplane, a close but slightly smaller relative of the two seat Caudron Type C. More than a dozen were completed, one exported to the United Kingdom, where they may also have been licence built, and three to China.
The VIH Holland H.1 was a Dutch two seat, low-powered biplane. Only one was built.
The Raab-Katzenstein RK.9 Grasmücke (Hedge-sparrow) was a 1920s German two-seat touring, advertising and training biplane. It was one of many designs from several countries aiming to provide low cost flying and was quite successful, with about twenty built.
The Wallace Touroplane was a late 1920s U.S. three seat, high wing cabin monoplane. About 20 were built.
