Designed by Pierre Dupont, the Hanriot HD.1 biplane was small but agile. It was rejected by the French Air Service in late 1916 but found favor with the air services of Belgium and Italy, becoming the standard Italian fighter during World War I. Though not as fast as the Albatros scouts or the Hansa-Brandenburg D.I, it was sturdy, reliable and very maneuverable. Entering service during the summer of 1917, the HD.1 proved its worth throughout the war. On 26 December 1917, Italian pilots equipped with the Hanriot HD.1 engaged and destroyed eleven German reconnaissance aircraft at Istrana without incurring a single loss. Willy Coppens, Belgium's consummate balloon-buster, scored most of his victories flying this aircraft.
Hanriot HD.I Specifications
Société Anonyme des Appareils d'Aviation Hanriot
831 in Italy by Macchi
125 in France
Le Rhône 9JB, 9 cylinder, air cooled rotary, 120 hp