The Curtiss NC was a flying boat built by Curtiss Aeroplane and Motor Company and used by the United States Navy from 1918 through the early 1920s. Ten of these aircraft were built, the most famous of which is the NC-4, the first airplane to make a transatlantic flight. The NC-4 is preserved in the National Museum of Naval Aviation, at NAS Pensacola, Florida.
The Caproni Ca.4 was an Italian heavy bomber of the World War I era.
The Ilyushin Il-30 was a Soviet turbojet-powered tactical bomber designed as a higher-performance, swept wing version of the Ilyushin Il-28, in the late 1940s. Its thin wing and engine nacelles necessitated the use of tandem landing gear, the first Soviet aircraft to do so. It was apparently canceled before the prototype made its first flight, although sources disagree with this.
The Kawanishi H3K, also known as Navy Type 90-2 Flying Boat (九〇式二号飛行艇), was a Japanese biplane military flying boat from the interwar period. The H3K was a development of the Short S.8/8 Rangoon. The first of the H3Ks was built by Short Brothers and the remaining four by Kawanishi in Japan.
The Loening M-8 was a 1910s American fighter monoplane designed by Grover Loening and built by his Loening Aeronautical Engineering Company. An order of 5000 for the United States Army Air Corps was canceled when the First World War ended.
The Gotha WD.11 was a torpedo bomber seaplane developed in Germany during World War I. When the general configuration of the Gotha WD.7 proved promising, Gotha set to work designing a much larger and more powerful aircraft along the same general lines. Like its predecessor, it was a conventional biplane with twin engines mounted tractor-fashion on the lower wing. The pilot and observer sat in tandem, open cockpits and the landing gear consisted of twin pontoons. 12 examples were built for the Imperial German Navy.
The Macchi M.8 was an Italian reconnaissance/bomber flying boat designed by Alessandro Tonini and built by Macchi. It was used by the Italian Naval Aviation and was later flown by crews from the United States Navy.
The Avro 529 was a twin-engined biplane long-range bomber of the First World War. Two prototypes were built but no production ensued.
The Rumpler G.I was a bomber aircraft produced in Germany during World War I, together with refined versions known as the G.II and G.III.
The Bristol Type 6 T.T.A was a British two-seat, twin-engine biplane, designed in 1915 as a defence fighter. Two prototypes were built, but the T.T.A. did not go into production.
The Vickers F.B.11 was a prototype British three-seat escort fighter of the First World War. A large single-engined biplane, it carried one gunner in a nacelle mounted on the upper wing to give an allround field of fire. Only a single example was completed.
The Sopwith Long Range Tractor Triplane (L.R.T.Tr) was a prototype British long-range three-seat triplane escort fighter of the First World War. Its unusual layout had a small gunner's nacelle mounted on the upper wing for an all-round field of fire. Only a single example was built, as other, smaller fighters proved more practicable.
The Westland Westbury was a British twin-engined fighter prototype of 1926. Designed by Westland Aircraft it never entered service but played a useful role in the testing of the COW 37 mm gun. Only the two prototypes were completed.
The Parnall Possum was an experimental triplane, with a single, central engine driving wing-mounted propellers via shafts and gears. Two of these British aircraft were built in the mid-1920s.
The Albatros C.II was a 1910s German military pusher reconnaissance biplane designed and built by Albatros Flugzeugwerke. Only one aircraft was built and the type did not enter production.
The Curtiss C-1 Canada was a twin-engined bomber aircraft of the First World War which was designed by Curtiss of America to be built by their Canadian subsidiary for the British Royal Naval Air Service and Royal Flying Corps. Although large orders were placed, only twelve were built, the type being rejected in favour of more capable aircraft such as the Handley Page O/100.
The Royal Aircraft Factory F.E.3 (also known as the A.E.1 was a British experimental single-engined pusher biplane built prior to the First World War. It was intended to be fitted with a shell-firing gun, but was quickly abandoned, being found to be structurally unsound.
The Daimler G.I, originally designated Daimler R.I, was a bomber aircraft designed and built in Germany from early in 1915.
The Blériot 117 or B-117 was a large, twin-engined French aircraft from the mid-1920s. Heavily armed with three gun positions, it was designed to defend bomber formations against fighter attack. It did not reach production but was developed into the more successful Blériot 127.
The Caproni Ca.66 and Caproni Ca.67 were Italian night bomber aircraft designed to re-equip the post-World War I Regia Aeronautica.
