The 1911 Curtiss Model D was an early United States pusher aircraft with the engine and propeller behind the pilot's seat. It was among the first aircraft in the world to be built in any quantity, during an era of trial-and-error development and equally important parallel technical development in internal combustion engine technologies.
The Curtiss F6C Hawk was a late 1920s American naval biplane fighter aircraft. It was part of the long line of Curtiss Hawk airplanes built by the Curtiss Aeroplane and Motor Company for the American military.
The Curtiss F7C Seahawk was a carrier-capable biplane fighter aircraft of the United States Navy Marine Corps in the late 1920s and early 1930s.
The Hansa-Brandenburg W.12 was a German biplane fighter floatplane of World War I. It was a development of Ernst Heinkel's previous KDW, adding a rear cockpit for an observer/gunner, and had an unusual inverted tailfin/rudder in order to give an uninterrupted field of fire.
The SPAD S.A was a French two-seat tractor biplane first flown in 1915. It was used by France and Russia in the early stages of the First World War in the fighter and reconnaissance roles. It was a unique aircraft that carried its observer in a nacelle ahead of wing, engine and propeller.
The Curtiss T-32 Condor II was a 1930s American biplane airliner and bomber aircraft built by the Curtiss Aeroplane and Motor Company. It was used by the United States Army Air Corps as an executive transport.
The Curtiss CR was a racing aircraft designed for the United States Navy in 1921 by Curtiss. It was a conventional single-seater biplane with a monocoque fuselage and staggered single-bay wings of equal span braced with N-struts. Two essentially similar landplane versions were built as the CR-1 and CR-2, which were both eventually converted to seaplanes as the CR-3 in 1923 and CR-4 in 1924. A refined version was developed for the US Army Air Service under the designation R-6. These latter two aircraft featured refined aerodynamics included surface-mounted radiators.
The Curtiss HS was a single-engined patrol flying boat built for the United States Navy during World War I. Large numbers were built from 1917 to 1919, with the type being used to carry out anti-submarine patrols from bases in France from June 1918. It remained in use with the US Navy until 1928, and was also widely used as a civil passenger and utility aircraft.
The Curtiss Model R was a utility aircraft produced for the United States Army and Navy during World War I. It was a conventional, two-bay biplane with slightly staggered wings of unequal span. The aircraft was provided with two open cockpits in tandem and fixed tailskid undercarriage, but many were built for the Navy with twin floats replacing the wheels. During the course of the war, Model Rs were used for general liaison and communication duties, as well for observation, training, and as air ambulances. In practice, the Curtiss powerplants supplied with these aircraft proved insufficient and were mostly replaced with Liberty engines. The Navy's Model R-3 floatplane had extended-span, three-bay wings, and was intended for use as a torpedo bomber. Some of these were later fitted with wheeled undercarriage and transferred to the Army as bombers under the designation Model R-9.
The Dunne D.8 of 1912 was a tailless swept wing biplane, designed by J. W. Dunne to have inherent stability. One example was supplied to RAE Farnborough. License-built Burgess-Dunne models were used by the US Signal Corps and United States Navy and the short-lived Canadian Aviation Corps. It was the latter's first and only warplane.
The Burnelli CB-16, also known as the Uppercu-Burnelli CB-300, was a passenger aircraft designed by the American company Burnelli in 1928. It was the first twin-engined aircraft to have retractable landing gear. Only one was built.
The Burnelli RB-1 was a US twin engine biplane airliner prototype from 1920, incorporating a lifting body fuselage.
The Curtiss Model 22 Cox Racers were two specialised racing aircraft built by the American Curtiss Aeroplane and Motor Company. The type was flown as a monoplane, biplane and triplane.
The Gallaudet D-1 was a prototype American biplane observation aircraft built by the Gallaudet Aircraft Company during World War I for the United States Navy. The aircraft was completed in 1916.
The Deperdussin Seagull was a seaplane developed by the British Deperdussin Company which was the English subsidiary of French company Société Pour les Appareils Deperdussin.
The Cooke 1913 Tractor Biplane was an experimental tandem biplane aircraft built by the Cooke Aeroplane Company in 1913.
The 1929 Curtiss Model 53 Condor, also known as the Curtiss Model 53 Condor 18 or the Curtiss CO Condor, was a civil passenger version of the Model 52 Condor bomber. A twin-engined biplane, it carried 18 passengers.
The Cairns A was a low wing, two tandem seat monoplane with a metal structure and stressed metal skin. It first flew late in 1931 with a 90 hp (67 kW) engine but was later fitted with more powerful engines including a 185 hp (138 kW) radial.
The Gallaudet D-2 was a prototype American biplane observation aircraft built by the Gallaudet Aircraft Company during World War I for the United States Army. Based on the earlier Gallaudet D-1, the D-2 had more powerful engines and had other improvements. The first prototype was completed in 1917, but crashed before it was accepted so Gallaudet had to build a replacement at its own expense. Two aircraft were completed in 1918, but further development ceased after the last one crashed with the death of the pilot.
The Duesenberg 16-valve straight-4 aero engine was based on the company's earlier engine of a similar configuration used for automotive racing. Completed in 1916, the first two engines were delivered to the Gallaudet Aircraft Company for use in their D-1 maritime patrol aircraft later that year.
