Overview
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.
Specifications
Figures are compiled from public sources and may be approximate; they can vary by variant and configuration.
Photos
Photo 1: FlugKerl2 / Wikimedia Commons · CC BY-SA 3.0
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