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, on February 2016
Role	Autogyro Type of aircraft
National origin	United States
Manufacturer	Kellett Autogiro Company
First flight	1934
Primary users	United States Army Air Forces Eastern Airlines
Developed into	Kayaba 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.