18th September 1928: Juan De La Cierva (1895 – 1936) sitting in a Cierva C-19 autogiro. Engineer Cierva, who developed the autogiro, achieved the first successful flight in 1923. (Photo by Crouch/Topical Press Agency/Getty Images)
Cierva Autogiro
18th September 1928: Juan De La Cierva (1895 – 1936) sitting in a Cierva C-19 autogiro. Engineer Cierva, who developed the autogiro, achieved the first successful flight in 1923. (Photo by Crouch/Topical Press Agency/Getty Images)