The Airco DH.9 was a British reconnaissance bomber of mixed biplane design with fixed landing gear. The drive was provided by one BHP or Wright Liberty 12 engine with a capacity of 230 and 400 hp. in accordance. The flight of the prototype took place in 1917. Approximately 3,200 examples of this successful aircraft were produced during series production in the period 1917-1918. Airco DH.9 armament with 3 7.69 mm or 7.7 mm machine guns and up to 210 kg of bombs. The Airco DH.9 was created as a result of demands from British Air Force officers fighting in France who reported the need for a new bomber and multi-role aircraft to replace the DH.4. The Airco factory radically changed the design of the DH.4 (using a new engine, changing the size of the fuselage and airfoil, a different airfoil profile, relocating the cockpit and observer), which reduced the time to introduction of series production. The aircraft proved to be very successful, but in 1918 the Airco DH.9A version was introduced, which had a more powerful engine and a larger wingspan. Airco DH.9 passed its baptism of fire in March 1918. Until the end of the First World War, machines of this type fought over France, in the Mediterranean and in the Middle East. In 1920, about 20 planes also reached Poland. They were withdrawn from British aviation in the late 1920s.
