Donnet-Denhaut D.D.9

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Donnet-Denhaut D.D.9
Role Flying Boat
Manufacturer Donnet-Denhaut
Introduction 1918[1]
Primary users Roundel of the French Air Force before 1945.svg France
US Army Air Roundel.svg U.S.A.
Number built ~100 [2][1]
Engine 200hp Hispano-Suiza 8Ba vee or
260hp Hispano-Suiza 8Fb or
300hp Canton-Unné Z9[note 1]
Armament 2×front flexible Lewis
2×rear flexible Lewis
Crew 3-4
Max Speed 140 km/h (87 mph)[3]
Climb 1,000 m (3,280 ft) in 6:30[3]
2,000 m (6,560 ft) in 18:00[3]
3,000 m (9,840 ft) in 27:00 [3]
Range 200 km (120 mi)[3]

French flying boats had seen significant losses to German seaplane-fighters, so the responded with the Donnet-Denhaut D.D.9, and enlarged Donnet-Denhaut D.D.8 with twin machine guns forward and aft. About one hundred were built and they were used as escorts by both Aviation Maritime and the US Navy.[3]

For more information, see Wikipedia:Donnet-Denhaut flying boat.


  1. Planes with this engine were designated the Donnet-Denhaut 300hp.
  1. 1.0 1.1 Nowarra, p.130.
  2. Davilla, p.195.
  3. 3.0 3.1 3.2 3.3 3.4 3.5 Davilla, p.196.
  • Dr. James J. Davilla and Arthur M. Soltan. French Aircraft of the First World War. Flying Machines Press, 1997. ISBN 0-9637110-4-0.
  • Heinz J. Nowarra, Bruce Robertson, and Peter G. Cooksley. Marine Aircraft of the 1914-1918 War. Letchworth, Herts, England: Harleyford Publications Limited, 1966. ISBN 0900435070