Cierva C.3

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Role experimental autogyro
Manufacturer Juan de la Cierva
Designer Juan de la Cierva
Number built 1

The Cierva C.3 was an experimental autogyro built by Juan de la Cierva in Spain in 1921.[citation needed] It was based on the fuselage of a Sommer monoplane, and was actually completed and tested before that aircraft. The C.3 utilised a single, three-bladed rotor in place of the coaxial double rotor tested on the C.1. A few short hops were achieved in testing and Cierva noted a tendency for the machine to want to roll over, thus alerting him to the problem of dissymmetry of lift that he would have to overcome in order to build a successful rotary-wing aircraft. The C.3 was damaged and rebuilt four times before being abandoned without having flown, la Cierva returning to work on the C.2.


  • Taylor, Michael J. H. (1989). Jane's Encyclopedia of Aviation. London: Studio Editions. p. 254.
  • World Aircraft Information Files. London: Bright Star Publishing. pp. File 891 Sheet 28.
  • Leishman, J. Gordon (2006). Principles of Helicopter Aerodynamics. Cambridge: Cambridge University Press. p. 699.

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