History
HD. The 8 was a prototype single-seat, single-engine biplane fighter developed by the French Hanriot during the First World War (1914-1918). It was mated to a new 180hp Le Rhone 9R series 9-cylinder air-cooled rotary engine, resulting in only one example of the aircraft being completed, mainly due to problems with the experimental engine. Flight tests of the full form took place in March-April 1918 - the last year of the war.
However, the troublesome engine never proved satisfactory, which in turn led to the official end of the program.
Finished (and flown), the aircraft borrows proven biplane qualities from previous Hanriot designs starting in HD. June 1, 1916, evolved through the mighty HD. June 3, 1917. With a biplane wing configuration, the sole pilot is located below and behind the upper wing member.
The engine typically drives a twin-blade propeller unit in the nose, and a conventional rear tow landing gear configuration is used for ground operations. Dimensions include an overall length of 20.1 feet and a wingspan of 31.5 feet. Curb weight is 1,060 lbs and MTOW is 1,520 lbs.
Using its Le Rhone engine, the plane was tested at 125 miles per hour and was able to stay in the air for about two hours on internal fuel.
Specification
Basic
Production
Roles
- Fighter
- Reconnaissance (RECCE)
- X-Plane / Development
Dimensions
20.18 ft (6.15 m)
9.6m
Weight
480 kg
700 kg
Performance
Performance
124 mph (200 km/h; 108 knots)
249 miles (400 km; 216 nautical miles)
Armor
Accept:
2 x 7.7mm Vickers machine guns mounted on fixed forward mounts above the nose and fired synchronously by rotating propeller blades.
Changes
HD. 8 - Name of the basic series; single, airworthy prototype completed.

