Kellett KD-1

Kellett KD-1
Kellett XR-3 modification of YG-1B (KD-1) of U.S. Army preserved at Yanks Air Museum, Chino airfield California, in February 2016
General information
TypeAutogyro
National originUnited States
ManufacturerKellett Autogiro Company
Primary usersUnited States Army Air Forces
History
First flight1934
Developed intoKayaba Ka-1/Ka-2

The Kellett KD-1 is a 1930s American autogyro built by the Kellett Autogiro Company. It had the distinction of being the first practical rotary-wing aircraft used by the United States Army and inaugurated the first scheduled air-mail service using a rotary-wing aircraft.

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