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The Cierva C.4 was an experimental autogyro built by Juan de la Cierva in Spain in 1922 which early the following year became the first autogyro to fly successfully. The failures of Cierva's previous designs the C.2 and C.3 had led him to understand that he needed to overcome the problem of dissymmetry of lift in order to get an autogyro to fly without rolling over.

The Cierva C-4, brainchild of Spaniard, Juan De La Cierva and his first demonstrably successful autogiro.1

Made by Juan de la Cierva.

Cierva C.4 Autogyro built by flybuddy Jerry Sigur from Steve Tillson plans.... O.S LA.40 power.2
Designer
Juan de la Cierva
Number Built
1
Manufacturer
Juan de la Cierva
First Flight
January 1923
Category
Autogyros
Spanish experimental aircraft 1920-1929

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