The Airco DH.9 - also known after 1920 as the de Havilland DH.9 - was a British bomber used in the First World War. A single-engined biplane it was a development of Airco's earlier highly successful DH.4 and was ordered in very large numbers for Britain's Royal Flying Corps and Royal Air Force.
Made by Airco.
Airco DH.9 is the predecessor of the Airco DH.9A.Airco DH.9C.Westland Walrus.