W.Green, G.Swanborough The Complete Book of Fighters

HANRIOT HD.9 France

   A single-seat reconnaissance fighter derived from the two-seat HD.3, the HD.9 was placed in the broad category of Avions de Corps d'Armee (thus being the HD.9 Apl) and its armament consisted of a single synchronised 7,7-mm Vickers machine gun. The airframe was basically that of the HD.3 and the installation of the 260 hp Salmson 9Z radial engine was identical, but fuel capacity was considerably increased. The first example of the HD.9 was completed in November 1918 as the initial aircraft built against an order for 10 machines. However, its career was cut short by the Armistice and there is no evidence that all nine remaining aircraft were completed.

Max speed, 137 mph (220 km/h) at sea level.
Range, 497 mis (800 km).
Empty weight, 1,565 lb (710 kg).
Span, 29 ft 6 1/4 in (9,00 m).
Length, 22 ft 9 1/2 in (6,95 m).
Wing area, 274.49 sq ft (25,50 m2).