This is a list of aviation-related events from 1920: == Events == Juan de la Cierva y Cordoniu invents the autogyro. His first autogyro, the Cierva C.1, fails to become airborne, but is the first aircraft to demonstrate the principle of autorotation as it taxis on the ground.
This is a list of aviation-related events from 1920: == Events == Juan de la Cierva y Cordoniu invents the autogyro. His first autogyro, the Cierva C.1, fails to become airborne, but is the first aircraft to demonstrate the principle of autorotation as it taxis on the ground.
Source: Wikipedia "1920 in aviation" · CC BY-SA 4.0
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