Airco DH.9A

The Airco DH.9A was a British single-engined light bomber designed and first used shortly before the end of the First World War. It was a development of the unsuccessful Airco DH.9 bomber, with a strengthened structure, and crucially, replacing the underpowered and unreliable Siddeley Puma engine of the DH.9 with the American Liberty engine.

Colloquially known as the "Ninak" (from the designation nine-A), it served on in large numbers for the Royal Air Force following the end of the war, both at home and overseas, where it was used for colonial policing in the Middle East, finally being retired in 1931. Over 2,400 examples of an unlicensed version, the Polikarpov R-1 was also built in the Soviet Union, the type serving as the standard Soviet light bomber and reconnaissance aircraft through the 1920s.