Juan de la Cierva invented which aircraft in the 1920s?
Answer and explanation
Correct answer: C. The autogyro
- Step 1: According to the official source: Juan de la Cierva y Codorníu, 1st Count of la Cierva ( [ ˈxwan de la ˈθjeɾβaj koðoɾˈni.u ] ; 21 September 1895 – 9 December 1936), was a Spanish civil engineer, pilot and a self-taught aeronautical engineer. ... His most famous accomplishment was the invention in 1920 of a rotorcraft called Autogiro, a single-rotor type of aircraft that came to be called autogyro in the English language. Answer: The autogyro. Why not the others: The seaplane, The glider, and The airship were developed earlier by other international aviation pioneers, whereas Juan de la Cierva invented the autogyro.
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