Thursday, January 13, 2011

Cierva, Juan de la

Cierva, Juan de la (hwän dā lä thyār'vä) [key], 18951936, Spanish aeronautical engineer, inventor of a rotary-wing aircraft called an autogiro. He flew his first autogiro in 1923 and crossed the English Channel in an improved model in 1928.
See his Wings of Tomorrow (1931).

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