The Albatros L 75 Ass was a German trainer biplane of the 1920s. Of conventional configuration, it seated the pilot and instructor in separate, open cockpits. The wings were single-bay, equal-span, and had a slight stagger. Production continued after Albatros was absorbed by Focke-Wulf.
The Arado S I was a biplane trainer built in Germany in 1925. The first of three prototypes was powered by a Bristol Lucifer radial engine, while the other two Arado S.Ia aircraft were fitted with the Siemens-Halske Sh 12. The Siemens-Halske Sh 11 powered the Arado S III, a virtually identical aircraft of which only a single prototype was constructed and sold to Turkey.
The Arado W 2 was a two-seat twin-engine seaplane trainer developed for the DVS in 1928. It was a cantilever monoplane with a fabric-covered steel tube fuselage that accommodated the pilot and instructor in tandem open cockpits. The undercarriage consisted of two pontoons carried on steel struts.
The Avia BH-26 was a two-seat armed reconnaissance aircraft built in Czechoslovakia in 1927. It was a single-bay unstaggered biplane with equal-span wings and a fixed tailskid undercarriage. Both upper and lower wings featured long-span ailerons, which were dynamically balanced by a small auxiliary airfoil mounted to the upper surface of the lower ailerons. Its design was typical of this type of aircraft built during World War I and the years following; pilot and observer sat in tandem open cockpits with the observer armed with a machine gun on a ring mount. As with many other Avia designs, the BH-26 originally had no fixed fin, only a rudder, but this was changed in service.
The Bergamaschi C-1 and C-2 were Italian single-engined light trainers built by Cantieri Aeronautici Bergamaschi for the Bergamo flying school.
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 CAMS 46 was a flying boat trainer aircraft built in France in the mid-1920s, essentially an updated version of the CAMS 30 that had flown in 1922. While retaining that aircraft's basic form, CAMS offered the French Navy two new versions with aerodynamic refinements over the earlier aircraft: the CAMS 46 E primary trainer, and the CAMS 46 ET intermediate trainer. Only the latter was selected for production and was built in quantity to supply one escadrille at the Naval training station at Hourtin.
The Savoia-Marchetti SM.62 was an Italian single-engine maritime patrol flying boat produced from 1926. It served with the Regia Aeronautica and with a number of foreign users, and was licence-produced in Spain and the Soviet Union. Some of the Spanish aircraft were still in service during the Spanish Civil War
The SET XV was a fighter aircraft developed in Romania in the mid-1930s. It was a conventional single-bay biplane with staggered wings of unequal span braced by N-struts. It was fitted with fixed tailwheel undercarriage with spatted mainwheels. The cockpit was fully enclosed, and the engine was fitted with a NACA cowl. Construction throughout was fabric-covered metal.
The International F-17 Sportsman was a 1920s American three-seat open-cockpit biplane designed and manufactured by the International Aircraft Corporation in Long Beach, California and Cincinnati, Ohio. 107 aircraft were built, 77 of them at Cincinnati.
The Focke-Wulf A 20 Habicht was an airliner developed in Germany in the late 1920s. It was a high-wing cantilever monoplane with fixed tailskid undercarriage. The fuselage was deep and seated four passengers in a fully enclosed cabin. The type was not bought by the airlines and only a few examples were built.
The Focke-Wulf S 2 was a trainer aircraft built in Germany in the late 1920s. It was a conventional parasol-wing monoplane with fixed tailskid undercarriage. The pilot and instructor sat side by side in an open cockpit. Only a single example was built.
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 Lederlin 380L is an unconventional light aircraft developed in France in the 1960s, and marketed for homebuilding.
The Morane-Saulnier MS.138 was a military trainer aircraft produced in France in the late 1920s,
The IMAM Ro.5 was a sport aircraft designed by Alessandro Tonini and produced by IMAM in Italy in the late 1920s.
The SABCA S.2 was an airliner built in Belgium in 1926.
The Lioré et Olivier LeO H-180 was a 1920s French two-seat flying-boat built by Lioré et Olivier.
The Skandinaviska Aero BHT-1 Beauty is a 1940s Swedish single-seat light monoplane designed by E. Bratt, K.E. Hilfing and B.Törnblom and built by Skandinaviska Aero of Stockholm.
The Breda A.14 was a prototype three-engined biplane, designed by Società Italiana Ernesto Breda as a night bomber in 1928. The aircraft was proposed to the Regia Aeronautica, but failed assessments, and was abandoned. The aircraft was designed to solve the flight problems experienced on the A.8. The A.14 was tested in 1928, powered by three 340 kW (450 hp) Alfa Romeo Jupiter engines. Although performance was improved, the Regia Aeronautica decided not to accept the A.14. To make up for the costs, it was suggested that a demilitarised version be sold to civilians, but a lack of civilian interest resulted in the abandonment of the project.
