Airco DH.9A

DH.9A
Airco D.H.9A
Role	Light bomber/General purpose Type of aircraft
Manufacturer	Airco
First flight	March 1918
Introduction	1918
Retired	1931
Primary users	Royal Air Force Soviet Air Forces Royal Australian Air Force
Number built	1,997 + 2,400+ as R.1
Developed from	Airco DH.9
Variants	Westland Walrus de Havilland DH.15

The Airco DH.9A is a British single-engined light bomber that was designed and first used shortly before the end of the First World War. It was a development of the unsuccessful Airco DH.9 bomber, featuring a strengthened structure and, crucially, replacing the under-powered and unreliable inline 6-cylinder Siddeley Puma engine of the DH.9 with the American V-12 Liberty engine.

Colloquially known as the "Ninak" (from the phonetic alphabet treatment of 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, were built in the Soviet Union, the type serving as the standard Soviet light bomber and reconnaissance aircraft through the 1920s.