The Lublin R-VIII was a Polish bomber, reconnaissance aircraft and seaplane designed in the late 1920s by the Plage i Laśkiewicz factory in Lublin. It was the first in-house design of Plage i Laśkiewicz, and the first with the name Lublin.
The Breda Ba.25 was an Italian two-seat biplane trainer designed and built by the Breda company. It was the most widely used Italian basic trainer of the 1930s.
The Fiat CR.1 was an Italian biplane fighter aircraft of the 1920s. Of wood-and-fabric construction, it was designed by Celestino Rosatelli, from whom it gained the 'CR' designation. Its most distinctive feature was that the lower wings were longer than the upper ones.
The Breda A.7 was a reconnaissance aircraft developed in Italy for use by the Regia Aeronautica in 1929. It was a braced parasol monoplane of conventional configuration with tailskid undercarriage. The pilot and observer sat in tandem, open cockpits. A single prototype of a long-range example, originally designated A.7 Raid and later A.16 was also constructed, but the air force showed no interest in it.
The Breda A.9 was a biplane trainer produced in Italy in 1928 for the Regia Aeronautica. Conventional in design, it featured a single-bay, unstaggered wing cellule and fixed tailskid undercarriage. The student and instructor sat in tandem, open cockpits. A slightly smaller version, designated A.9-bis was developed for use in Italy's aeroclubs.
The Caproni Ca.100 was the standard trainer aircraft of the Regia Aeronautica in the 1930s. Large numbers of this tandem, two-seat, biplane were built, powered by different engines.
The Vickers Vendace was a 1920s British trainer aircraft. It was originally designed as a floatplane trainer for the Royal Air Force.
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 Gourdou-Leseurre GL.30 was a racing aircraft built in France in 1920 which formed the basis for a highly successful family of fighter aircraft based on the same design.
The Savoia-Marchetti S.57 was an Italian single-engine biplane flying boat intended for aerial reconnaissance, built by Savoia-Marchetti for Regia Aeronautica after World War I.
The Keystone K-55 Pronto was a mail plane developed in the United States in the late 1920s.
The Lioré et Olivier LeO 25 was a bomber aircraft produced in France in the late 1920s.
The Bellanger-Denhaut 22 was a twin-engined bomber/reconnaissance flying boat designed by François Denhaut the technical director for seaplanes for the car manufacturer Bellanger.
The Romano R.90 was a prototype single-seat French floatplane fighter of the 1930s. A single example of the R.90 was built, but the type did form the basis of the Romano R.83 and Romano R.92 fighters which were built in secret for the Spanish Republicans during the Spanish Civil War.
The Breda A.14 was a prototype three-engined biplane, designed by Società Italiana Ernesto Breda as a night bomber in 1928.
The Sage Type 4 was a prototype British floatplane of the First World War. It was a designed as a two-seat reconnaissance aircraft for the Royal Naval Air Service, but was chosen for service as a floatplane trainer, although the end of the war resulted in production being cancelled.
The Port Victoria P.V.5 was a British single-engined floatplane fighter aircraft of the First World War. A single example was built and flown at the Royal Naval Air Service's Port Victoria Marine Experimental Aircraft Depot on the Isle of Grain in 1917. Despite demonstrating good manoeuvrability and handling, no production followed, with the Royal Naval Air Service instead using landplanes for the fighter role.
The TNCA Series C Microplano was a single-engine, single-seat fighter designed and built in Mexico during World War I.
The Macchi M.C.77 was a reconnaissance bomber flying boat built by Macchi in the thirties and remained at the prototype stage.
The IMAM Ro.26, sometimes called the Romeo Ro.26, was a single-engine biplane trainer aircraft produced by the Italian aeronautical company IMAM in the early 1930s. Only one example was built.
